Document:

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS
WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR REGISTERED OR QUALIFIED
FOR SALE UNDER ANY STATE OR FOREIGN SECURITIES LAWS. THEY MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED, OR HYPOTHECATED UNLESS (I)
A REGISTRATION STATEMENT COVERING SUCH SHARES IS EFFECTIVE UNDER THE ACT AND IS QUALIFIED UNDER APPLICABLE STATE AND FOREIGN LAW
OR (II) THE TRANSACTION IS EXEMPT FROM THE REGISTRATION AND PROSPECTUS DELIVERY REQUIREMENTS UNDER THE ACT AND THE QUALIFICATION
REQUIREMENTS UNDER APPLICABLE STATE AND FOREIGN LAW AND AN OPINION SATISFACTORY TO THE COMPANY TO SUCH EFFECT HAS BEEN RENDERED
BY COUNSEL.

 

WARRANT AGREEMENT

 

To Purchase Shares
of Preferred Stock of

 

GLORI ENERGY INC.

 

Dated as of June 11,
2012 (the “Effective Date”)

 

WHEREAS, Glori Energy Inc., a Delaware corporation
(the “Company”), Glori California Inc., a Delaware corporation, Glori Holdings Inc., a Delaware corporation
and Glori Oil (Argentina) Limited, a Delaware corporation have entered into a Loan and Security Agreement of even date herewith
(the “Loan Agreement”) with Hercules Technology Growth Capital, Inc., a Maryland corporation (the “Warrantholder”);

 

WHEREAS, the Company desires to grant to
Warrantholder, in consideration for, among other things, the financial accommodations provided for in the Loan Agreement, the right
to purchase shares of its Preferred Stock pursuant to this Warrant Agreement (this “Agreement”);

 

NOW, THEREFORE, in consideration of the
Warrantholder executing and delivering the Loan Agreement and providing the financial accommodations contemplated therein, and
in consideration of the mutual covenants and agreements contained herein, the Company and Warrantholder agree as follows:

 

SECTION 1.          GRANT
OF THE RIGHT TO PURCHASE PREFERRED STOCK.

 

For value received, the Company hereby grants
to the Warrantholder, and the Warrantholder is entitled, upon the terms and subject to the conditions hereinafter set forth, to
subscribe for and purchase, from the Company, the Designated Warrant Number (as defined below) of fully paid and non-assessable
shares of the Preferred Stock (as defined below) at the Exercise Price (as defined below). The number and Exercise Price of such
shares are subject to adjustment as provided in Section 8. As used herein, the following terms shall have the following meanings:

 

“Act” means the Securities Act
of 1933, as amended.

 

“Affiliate” of a person means any
other person that directly or indirectly, through one or more intermediaries, controls, is controlled by, or is under common control
with, such person. The term “control” (including the terms “controlled by” and “under common control
with”) means the possession, directly or indirectly, of the power to direct or cause the direction of the management and
policies of a person, whether through the ownership of voting securities, by contract or otherwise. The term “person”
as used in this Agreement means an individual, corporation, partnership, joint venture, limited liability company, trust, association
or other entity.

 

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“Business Day”
means any day, except a Saturday, Sunday or legal holiday, on which banking institutions in Houston, Texas or Palo Alto,
California are authorized or obligated by law or executive order to close.

 

“Charter” means the Company’s
Certificate of Incorporation or other constitutional document, as may be amended, restated or amended and restated from time to
time.

 

“Common Stock” means the Company’s
common stock, $0.0001 par value per share.

 

“Designated Warrant Number” means
the quotient of the Warrant Coverage divided by the Exercise Price, which quotient, if not a whole number, shall be rounded down
to the nearest whole number.

 

“Excluded Issuances” means any
issuance or sale by the Company after the Effective Date of: (a) shares of Preferred Stock or Common Stock issued upon the exercise
of this Agreement; (b) shares of Preferred Stock, Common Stock or securities (directly or indirectly) convertible into or exchangeable
for Preferred Stock or Common Stock, including warrants or other rights or options to subscribe for or purchase Common Stock or
Preferred Stock, issued (i) to persons in connection with a joint venture, strategic alliance or other commercial relationship
with such person (including persons that are customers, suppliers and strategic partners of the Company) relating to the operation
of the Company's business and not for the primary purpose of raising equity capital, (ii) in connection with a transaction in which
the Company, directly or indirectly, acquires another business or its tangible or intangible assets, or (iii) to lenders as equity
kickers in connection with debt financings of the Company, in each case where such transactions have been approved by the Board
of Directors of the Company; (c) shares of Preferred Stock, Common Stock or securities (directly or indirectly) convertible into
or exchangeable for Preferred Stock or Common Stock, including warrants or other rights or options to subscribe for or purchase
Common Stock or Preferred Stock issued to the lessor or vendor in any office lease or equipment lease or similar equipment financing
transaction in which the Company obtains the use of such office space or equipment for its business; or (d) shares of Preferred
Stock, Common Stock or securities (directly or indirectly) convertible into or exchangeable for Preferred Stock or Common Stock,
including warrants or other rights or options to subscribe for or purchase Common Stock or Preferred Stock, that is covered by
Section 8 of this Agreement.

 

“Exercise Price” means a purchase
price of any of the following, as applicable: (a) if the Warrant is exercised with respect to Series C Preferred Stock, the lower
of (i) $2.741 per share, or (ii) the Subsequent Round Securities Price Per Share (whether such Subsequent Round is with respect
to Series C Preferred Stock or another Subsequent Round, at Warrantholder’s option), or (b) if the Warrant is exercised with
respect to another Subsequent Round, the Subsequent Round Securities Price Per Share.

 

“Initial Public Offering” means
the initial underwritten public offering of the Company’s Common Stock pursuant to a registration statement under the Act,
which public offering has been declared effective by the Securities and Exchange Commission (“SEC”).

 

“Merger Event” means a merger or
consolidation involving the Company in which the Company is not the surviving entity, or in which the outstanding shares of the
Company’s capital stock are otherwise converted into or exchanged for shares of capital stock of another entity.

 

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“Preferred Stock” means, at the
Warrantholder’s option, (a) the Series C Preferred Stock of the Company, or (b) shares of any other series of preferred stock
of the Company issued in a Subsequent Round prior to the Initial Public Offering. In the case of each of (a) and (b), upon and
after the occurrence of an event which results in the automatic or voluntary conversion, redemption or retirement of all (but not
less than all) of the outstanding shares of such Preferred Stock, including, without limitation, the consummation of an Initial
Public Offering of the Common Stock in which such a conversion occurs, into shares of Common Stock (any such event referred to
herein as a “Conversion Event”) then from and after the date upon which such outstanding shares are so converted,
redeemed or retired, “Preferred Stock” shall mean such Common Stock. If a Conversion Event occurs with respect to a
series of Preferred Stock, then in lieu of such shares of Preferred Stock that the Warrantholder would have been entitled to purchase
pursuant to this Agreement prior to such Conversion Event, the Warrantholder shall thereafter be entitled to purchase such number
of shares of Common Stock that the Warrantholder would have been entitled to had it exercised this Agreement with respect to such
shares of Preferred Stock immediately prior to such Conversion Event and then participated in the Conversion Event.

 

“Purchase Price” means, with respect
to any exercise of this Agreement, an amount equal to the Exercise Price as of the relevant time multiplied by the number of shares
of Preferred Stock requested to be exercised under this Agreement pursuant to such exercise.

 

“Subsequent Round” means the closing
of any Company financing involving the sale of Preferred Stock for cash which becomes effective after the Effective Date but before
an Initial Public Offering. Subsequent Round shall exclude the Excluded Issuances.

 

“Subsequent Round Securities Price Per Share”
means the lowest price per share paid by investors paying cash for Preferred Stock issued and sold by the Company in the Subsequent
Round.

 

“Warrant Coverage” means $400,000.

 

SECTION 2.          TERM
OF THE AGREEMENT.

 

Except as otherwise provided for herein,
the term of this Agreement and the right to purchase Preferred Stock as granted herein (the “Warrant”) shall
commence on the Effective Date and shall be exercisable for a period ending at 5:00 p.m., Houston, Texas time, on the tenth anniversary
of the Effective Date, or if such day is not a Business Day, on the next preceding Business Day.

 

SECTION 3.          EXERCISE
OF THE PURCHASE RIGHTS.

 

(a)         Exercise. The purchase rights
set forth in this Agreement are exercisable by the Warrantholder, for all or any part of the Warrant Coverage, at any time, or
from time to time, prior to the expiration of the term set forth in Section 2, by tendering to the Company at its then principal
executive offices this Agreement and a notice of exercise in the form attached hereto as Exhibit I (the “Notice
of Exercise”), duly completed and executed and payment in full of the Purchase Price in accordance with the terms set
forth below. Promptly upon receipt of the Notice of Exercise and the payment of the Purchase Price in accordance with the terms
set forth below, and in no event later than five (5) Business Days thereafter, the Company shall issue to the Warrantholder a
certificate for the number of shares of Preferred Stock purchased and shall execute the acknowledgment of exercise in the form
attached hereto as Exhibit II (the “Acknowledgment of Exercise”) indicating the Warrant Coverage amount
which remains subject to future purchases, if any.

 

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The Purchase Price may be paid at the Warrantholder's
election either (i) by cash or check, or (ii) by surrender of all or a portion of the Warrant for shares of Preferred Stock to
be exercised under this Agreement and, if applicable, an amended Agreement representing the remaining number of shares purchasable
hereunder, as determined below (“Net Issuance”). If the Warrantholder elects the Net Issuance method, the Company
will issue Preferred Stock in accordance with the following formula:

 

	 	 	X = Y(A-B)	 
	 	 	A	 
	 	 	 	 
	Where:	X =	the number of shares of Preferred Stock to be issued to the Warrantholder.
	 	 	 	 
	 	 	Y =         the number of shares of Preferred Stock requested to be exercised under this Agreement.
	 	 	A =        the fair market value of one (1) share of Preferred Stock at the time of issuance of such shares of Preferred Stock.
	 	 	 
	 	B =	the Exercise Price.

 

For purposes of the above calculation, current
fair market value of Preferred Stock shall mean with respect to each share of Preferred Stock:

 

(i)
         if the exercise is in connection with an Initial Public Offering, and if the Company's Registration Statement relating to
such Initial Public Offering has been declared effective by the SEC and the Initial Public Offering has closed, then the fair
market value per share shall be the product of (x) the initial “Price to Public” of the Common Stock specified in
the final prospectus with respect to the offering and (y) the number of shares of Common Stock into which each share of Preferred
Stock is convertible at the time of such exercise;

 

(ii)         if
the exercise is after, and not in connection with an Initial Public Offering, and:

 

(A) if
the Common Stock is traded on a securities exchange, the fair market value shall be deemed to be the product of (x) the average
of the closing prices over a five (5) day period ending three days before the day the current fair market value of the securities
is being determined and (y) the number of shares of Common Stock into which each share of Preferred Stock was convertible at the
time of the Initial Public Offering; or

 

(B) if
the Common Stock is traded over-the-counter, the fair market value shall be deemed to be the product of (x) the average of the
closing bid and asked prices quoted on the NASDAQ system (or similar system) over the five (5) day period ending three days before
the day the current fair market value of the securities is being determined and (y) the number of shares of Common Stock into which
each share of Preferred Stock was convertible at the time of the Initial Public Offering;

 

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(iii)        if
at any time the Common Stock is not listed on any securities exchange or quoted in the NASDAQ National Market or the over-the-counter
market, the current fair market value of Preferred Stock shall be the product of (x) the highest price per share which the Company
could obtain from a willing buyer (not a current employee or director) for shares of Common Stock sold by the Company, from authorized
but unissued shares, as determined in good faith by its Board of Directors, unless the Company shall become subject to a Merger
Event, in which case the fair market value of Preferred Stock shall be deemed to be the per share value received by the holders
of the Company's Preferred Stock on a common equivalent basis pursuant to such Merger Event, and (y) the number of shares of Common
Stock into which each share of Preferred Stock is convertible at the time of such exercise; provided, however, that if such exercise
occurs on or after the time of a Conversion Event, the number of shares of Common Stock into which each share of Preferred Stock
is converted shall be the number of shares of Common Stock into which each share of Preferred Stock was convertible at the time
of the Conversion Event.

 

Upon partial exercise of the Warrant,
the Company shall promptly issue an amended Agreement representing the remaining Warrant Coverage hereunder. All other terms and
conditions of such amended Agreement shall be identical to those contained herein, including, but not limited to the Effective
Date hereof.

 

(b)         Exercise Prior to Expiration.
To the extent this Agreement is not previously exercised as to all Preferred Stock subject hereto, and if the fair market value
of one share of the Preferred Stock is greater than the Exercise Price then in effect, this Agreement shall be deemed automatically
exercised pursuant to Section 3(a) (even if not surrendered) immediately before its expiration. For purposes of such automatic
exercise, the fair market value of one share of the Preferred Stock upon such expiration shall be determined pursuant to Section
3(a). To the extent this Agreement or any portion thereof is deemed automatically exercised pursuant to this Section 3(b), the
Company agrees to promptly notify the Warrantholder of the number of shares of Preferred Stock, if any, the Warrantholder is to
receive by reason of such automatic exercise.

 

SECTION 4.          RESERVATION
OF SHARES.

 

During the term of this Agreement, the Company
will at all times have authorized and reserved a sufficient number of shares of its Preferred Stock to provide for the exercise
of the rights to purchase Preferred Stock as provided for herein, and shall have authorized and reserved a sufficient number of
shares of its Common Stock to provide for the conversion of the Preferred Stock available hereunder; provided, however, that if
at any time the number of authorized but unissued shares of Preferred Stock or Common Stock shall not be sufficient or shall not
be sufficient to effect the conversion of the Preferred Stock available hereunder, the Company shall take such corporate action
as may be necessary to increase its authorized but unissued shares of Preferred Stock or Common Stock, as applicable, to such number
of shares as shall be sufficient for such purposes, including, without limitation, engaging in commercially reasonable best efforts
to obtain the requisite stockholder approval of the necessary amendment to the Certificate of Incorporation.

 

SECTION 5.          NO FRACTIONAL SHARES OR
SCRIP.

 

No fractional shares or scrip representing
fractional shares shall be issued upon the exercise of this Agreement, but in lieu of such fractional shares the Company shall
make a cash payment therefor upon the basis of the Exercise Price then in effect.

 

SECTION 6.          NO RIGHTS AS SHAREHOLDER/STOCKHOLDER.

 

This Agreement does not entitle the Warrantholder
to any voting rights or other rights as a stockholder of the Company prior to the exercise of this Agreement.

 

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SECTION 7.          WARRANTHOLDER REGISTRY.

 

The Company shall maintain a registry showing
the name and address of the registered holder of this Agreement. Warrantholder's initial address, for purposes of such registry,
is set forth below Warrantholder's signature on this Agreement. Warrantholder may change such address by giving written notice
of such changed address to the Company.

 

SECTION 8.          ADJUSTMENT RIGHTS.

 

The Exercise Price and the number of shares
of Preferred Stock purchasable hereunder are subject to adjustment, as follows:

 

(a)          Merger
Event. If at any time there shall be Merger Event, then, as a part of such Merger Event, lawful provision shall be made so
that the Warrantholder shall thereafter be entitled to receive, upon exercise of this Agreement, the number of shares of preferred
stock or other securities or property of the successor corporation resulting from such Merger Event that would have been issuable
if Warrantholder had exercised this Agreement immediately prior to the Merger Event. In any such case, appropriate adjustment (as
determined in good faith by the Company's Board of Directors) shall be made in the application of the provisions of this Agreement
with respect to the rights and interests of the Warrantholder after the Merger Event to the end that the provisions of this Agreement
(including adjustments of the Exercise Price and number of shares of Preferred Stock purchasable) shall be applicable in their
entirety, and to the greatest extent possible. Without limiting the foregoing, in connection with any Merger Event, upon the closing
thereof, the successor or surviving entity shall assume the obligations of this Agreement. Notwithstanding anything to the contrary
contained herein, with respect to any Merger Event, the Warrantholder shall have the right to elect prior to the consummation of
such Merger Event, to give effect to the exercise rights contained in Section 3 of this Agreement instead of giving effect to the
provisions contained in this Section 8(a) with respect to this Warrant.

 

(b)          Reclassification
of Shares. Except as set forth in Section 8(a), if the Company at any time shall, by combination, reclassification, exchange
or subdivision of securities or otherwise, change any of the securities as to which purchase rights under this Agreement exist
into the same or a different number of securities of any other class or classes, this Agreement shall thereafter represent the
right to acquire such number and kind of securities as would have been issuable as the result of such change with respect to the
securities which were subject to the purchase rights under this Agreement immediately prior to such combination, reclassification,
exchange, subdivision or other change.

 

(c)          Subdivision
or Combination of Shares. If the Company at any time shall combine or subdivide its Preferred Stock, (i) in the case of a subdivision,
the Exercise Price shall be proportionately decreased, or (ii) in the case of a combination, the Exercise Price shall be proportionately
increased.

 

(d)          Stock
Dividends. If the Company at any time while this Agreement is outstanding and unexpired shall:

 

(i)          pay
a dividend with respect to the Preferred Stock payable in Preferred Stock, then the Exercise Price shall be adjusted, from and
after the date of determination of stockholders entitled to receive such dividend or distribution, to that price determined by
multiplying the Exercise Price in effect immediately prior to such date of determination by a fraction (A) the numerator of which
shall be the total number of shares of Preferred Stock outstanding immediately prior to such dividend or distribution, and (B)
the denominator of which shall be the total number of shares of Preferred Stock outstanding immediately after such dividend or
distribution; or

 

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(ii)
        make any other distribution with respect to Preferred Stock (or stock into
which the Preferred Stock is convertible), except (i) any distribution specifically provided for in any other clause of this Section
8 and (ii) any accruing dividends set forth in Article FOURTH, Section B. 1. of the Company’s Charter or any comparable
provision contained in the Company’s Charter for any other series of Preferred Stock issued after the Effective Date (“Accruing
Dividends”), then, in each such case, provision shall be made by the Company such that the Warrantholder shall receive
upon exercise or conversion of this Warrant a proportionate share of any such distribution as though it were the holder of the
Preferred Stock (or other stock for which the Preferred Stock is convertible) as of the record date fixed for the determination
of the stockholders of the Company entitled to receive such distribution.

 

(e) Antidilution Rights. The Company
shall promptly provide the Warrantholder with any restatement, amendment, modification or waiver of the Charter. The Company shall
provide Warrantholder with prior written notice of any Subsequent Round to occur after the Effective Date of this Agreement, which
notice shall include (a) the price at which such stock or security is to be sold, (b) the number of shares to be issued, and (c)
such other information as necessary for Warrantholder to determine if a dilutive event has occurred.

 

(f) Notice of Adjustments. If: (i)
the Company shall declare any dividend or distribution upon its stock, whether in stock, cash, property or other securities (and
until termination of the Loan Agreement, assuming Warrantholder consents to a dividend involving cash as contemplated by Section
7.7 of the Loan Agreement); (ii) the Company shall offer for subscription prorata to the holders of any class of its Preferred
Stock or other convertible stock any additional shares of stock of any class or other rights; (iii) there shall be any Merger Event;
(iv) there shall be an Initial Public Offering; (v) the Company shall sell, lease, license or otherwise transfer all or substantially
all of its assets; or (vi) there shall be any voluntary dissolution, liquidation or winding up of the Company; then, in connection
with each such event, the Company shall send to the Warrantholder: (A) at least twenty (20) days' prior written notice of the date
on which the books of the Company shall close or a record shall be taken for such dividend, distribution, subscription rights (specifying
the date on which the holders of Preferred Stock shall be entitled thereto) or for determining rights to vote in respect of such
Merger Event, dissolution, liquidation or winding up; (B) in the case of any such Merger Event, sale, lease, license or other transfer
of all or substantially all assets, dissolution, liquidation or winding up, at least twenty (20) days' prior written notice of
the date when the same shall take place (and specifying the date on which the holders of Preferred Stock shall be entitled to exchange
their Preferred Stock for securities or other property deliverable upon such Merger Event, dissolution, liquidation or winding
up); and (C) in the case of an Initial Public Offering, the Company shall give the Warrantholder at least twenty (20) days' written
notice prior to the effective date thereof.

 

Each such written notice shall set forth,
in reasonable detail, (i) the event requiring the notice, and (ii) if any adjustment is required to be made, (A) the amount of
such adjustment, (B) the method by which such adjustment was calculated, (C) the adjusted Exercise Price (if the Exercise Price
has been adjusted), and (D) the number of shares subject to purchase hereunder after giving effect to such adjustment, and shall
be given by first class mail, postage prepaid, or by reputable overnight courier with all charges prepaid, addressed to the Warrantholder
at the address for Warrantholder set forth in the registry referred to in Section 7.

 

(g) Timely Notice. Failure to timely
provide such notice required by subsection (f) above shall entitle Warrantholder to retain the benefit of the applicable notice
period notwithstanding anything to the contrary contained in any insufficient notice received by Warrantholder. For purposes of
this subsection (g), the notice period shall begin on the date Warrantholder receives a written notice in accordance with Section
12(g) containing all the information required to be provided in such subsection (f).

 

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SECTION 9.          REPRESENTATIONS,
WARRANTIES AND COVENANTS OF THE COMPANY.

 

(a)  Reservation of Preferred
Stock. The Preferred Stock issuable upon exercise of the Warrantholder's rights hereunder as of the Effective Date has been
duly and validly reserved and, when issued in accordance with the provisions of this Agreement, will be validly issued, fully paid
and non-assessable, and will be free of any taxes, liens, charges or encumbrances of any nature whatsoever; provided, that the
Preferred Stock issuable pursuant to this Agreement may be subject to restrictions on transfer under state and/or federal securities
laws. On or prior to the Effective Date, the Company has made available to the Warrantholder true, correct and complete copies
of its Charter and current bylaws. The issuance of certificates for shares of Preferred Stock upon exercise of this Agreement shall
be made without charge to the Warrantholder for any issuance tax in respect thereof, or other cost incurred by the Company in connection
with such exercise and the related issuance of shares of Preferred Stock; provided, that the Company shall not be required
to pay any tax which may be payable in respect of any transfer and the issuance and delivery of any certificate in a name other
than that of the Warrantholder, and no such issuance or delivery shall be made unless and until the person requesting such issuance
has paid to the Company the amount of any such tax, or has established to the satisfaction of the Company that such tax has been
paid.

 

(b)  Due Authority. The
execution and delivery by the Company of this Agreement and the performance of all obligations of the Company hereunder, including
the issuance to Warrantholder of the right to acquire the shares of Preferred Stock and the Common Stock into which it may be converted,
have been duly authorized by all necessary corporate action on the part of the Company. This Agreement: (1) does not violate the
Company's Charter or current bylaws; (2) does not contravene any law or governmental rule, regulation or order applicable to it;
and (3) does not and will not contravene any provision of, or constitute a default under, any indenture, mortgage, contract or
other instrument to which it is a party or by which it is bound, other than, in the case of (2) and (3) above, any such violation
or contravention that would not have a material adverse affect on the business or financial condition of the Company. This Agreement
constitutes a legal, valid and binding agreement of the Company, enforceable in accordance with its terms, except as limited by
applicable bankruptcy, insolvency, reorganization, moratorium, fraudulent conveyance, and any other laws of general application
affecting enforcement of creditors’ rights generally, and as limited by laws relating to the availability of specific performance,
injunctive relief, or other equitable remedies.

 

(c)  Consents and Approvals.
No consent or approval of, giving of notice to, registration with, or taking of any other action in respect of any state, federal
or other governmental authority or agency is required with respect to the execution, delivery and performance by the Company of
its obligations under this Agreement, except for the filing of notices pursuant to Regulation D under the Act and any filing required
by applicable state securities law, which filings will be effective by the time required thereby.

 

(d)  Issued Securities.
All issued and outstanding shares of Common Stock, Preferred Stock or any other securities of the Company have been duly authorized
and validly issued and are fully paid and nonassessable. All outstanding shares of Common Stock, Preferred Stock and any other
securities were issued in full compliance with all federal and state securities laws. In addition, as of the date immediately preceding
the date of this Agreement:

 

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(i)          The
authorized capital of the Company consists of (A)100,000,000 shares of Common Stock, of which 3,066,663 shares are issued and outstanding,
and (B) 10,719,511 shares of Preferred Stock, of which 521,852 are designated as Series A Preferred Stock, 2,901,052 are designated
as Series B Preferred Stock and 7,296,607 are designated as Series C Preferred Stock. The following shares of Preferred Stock are
issued and outstanding: 475,541 shares of Series A Preferred Stock; 2,901,052 shares of Series B Preferred Stock and 7,296,607
shares of Series C Preferred Stock.

 

(ii)         The
Company has reserved 5,453,740 shares of Common Stock for issuance under its Glori Oil Limited Amended and Restated 2006 Stock
Option and Grant Plan, under which 4,608,226 options are outstanding. There are no other options, warrants, conversion privileges
or other rights presently outstanding to purchase or otherwise acquire any authorized but unissued shares of the Company's capital
stock or other securities of the Company, except for a warrant issued to Silicon Valley Bank dated August 5, 2008 and a warrant
issued to GTI Glori Oil Fund I L.P. dated November 30, 2006. The Company has no outstanding loans to any employee, officer or director
of the Company, and the Company agrees not to enter into any such loan or otherwise guarantee the payment of any loan made to an
employee, officer or director by a third party.

 

(iii)        No
stockholder of the Company has preemptive rights to purchase new issuances of the Company's capital stock, other than as set forth
in Section 4 of the Third Amended and Restated Investors’ Rights Agreement, dated as of December 30, 2011, among the Company
and the investors named therein, as amended by the First Amendment to the Third Amended and Restated Investors’ Rights Agreement,
dated as of January 19, 2012, among the Company and the investors named therein (the “Investors’ Rights Agreement”).

 

(e)          Insurance.
As of the Effective Date, the Company has in full force and effect insurance policies, with extended coverage, insuring the Company
and its property and business against such losses and risks, and in such amounts, as are customary for corporations engaged in
a similar business and similarly situated and as otherwise may be required pursuant to the terms of any other contract or agreement.

 

(f)          Other
Commitments to Register Securities. Except as set forth in the Investors’ Rights Agreement, the Company is not, pursuant
to the terms of any other agreement in existence as of the Effective Date, under any obligation to register under the Act any of
its presently outstanding securities or any of its securities which may hereafter be issued.

 

(g)          Exempt
Transaction. Subject to the accuracy of the Warrantholder's representations in Section 10, the issuance of the Preferred Stock
upon exercise of this Agreement, and the issuance of the Common Stock upon conversion of the Preferred Stock, will each constitute
a transaction exempt from (i) the registration requirements of Section 5 of the Act, in reliance upon Section 4(2) thereof, and
(ii) the qualification requirements of the applicable state securities laws.

 

(h)          Compliance
with Rule 144. If the Warrantholder proposes to sell Preferred Stock issuable upon the exercise of this Agreement, or the Common
Stock into which it is convertible, in compliance with Rule 144 promulgated under the Act and if the Company is a reporting issuer
as described in Rule 144(c)(1) promulgated under the Act, then, upon Warrantholder's written request to the Company, the Company
shall furnish to the Warrantholder, within ten days after receipt of such request, a written statement confirming the Company's
compliance with the filing requirements set forth in Rule 144(c)(1) promulgated under the Act, as such Rule may be amended from
time to time.

 

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(i)          Information
Rights. From the Effective Date until the date a registration statement is declared effective in connection with an Initial
Public Offering, Warrantholder shall be entitled to the information rights contained in Section 7.1 of the Loan Agreement, and
Section 7.1 of the Loan Agreement is hereby incorporated into this Agreement by this reference as though fully set forth herein,
provided, however, that the Company shall not be required to deliver a Compliance Certificate once all Indebtedness (as defined
in the Loan Agreement) owed by the Company to Warrantholder has been repaid. Notwithstanding anything to the contrary contained
herein, only Hercules Technology Growth Capital, Inc. and its Affiliates shall be entitled to the rights set forth in this Section
9(i) for so long as Warrantholder or an Affiliate is a Warrantholder and no other assignee or transferee of this Warrant or any
of the rights hereunder shall be entitled to the information rights set forth in this Section 9(i).

 

SECTION 10.         REPRESENTATIONS
AND COVENANTS OF THE WARRANTHOLDER.

 

This Agreement has been entered into by
the Company in reliance upon the following representations and covenants of the Warrantholder:

 

(a)  Investment
Purpose. The right to acquire Preferred Stock or the Preferred Stock issuable upon exercise of the Warrantholder's rights contained
herein or the Common Stock issuable upon conversion of the Preferred Stock will be acquired for investment for the Warrantholder’s
own account and not with a view to the sale or distribution of any part thereof, and the Warrantholder has, and at the time of
exercise will have, no present intention of selling or engaging in any public distribution of the same except pursuant to registration
or exemption under the Act.

 

(b)  Private
Issue. The Warrantholder understands (i) that the Preferred Stock (and the Common Stock issuable upon conversion of the Preferred
Stock) issuable upon exercise of this Agreement is not registered under the Act or qualified under applicable state securities
laws on the ground that the issuance contemplated by this Agreement will be exempt from the registration and qualifications requirements
thereof, (ii) that this Warrant and the Preferred Stock (and the Common Stock issuable upon conversion of the Preferred Stock)
to be issued upon exercise hereof are “restricted securities” under the federal securities laws inasmuch as they are
being acquired from the Company in a transaction not involving a public offering and that, under such laws and applicable regulations,
such securities may be resold without registration under the Act only in certain limited circumstances, and (iii) that the Company's
reliance on such exemption is predicated on the representations set forth in this Section 10.

 

(c)  Financial
Risk. The Warrantholder has such knowledge and experience in financial and business matters as to be capable of evaluating
the merits and risks of its investment, and has the ability to bear the economic risks of the investment in this Warrant. The Warrantholder
has had an opportunity to ask questions and receive answers from the Company regarding the terms and conditions of the offering
of the Warrant and the business, properties, prospects and financial condition of the Company.

 

(d)  Risk of No Registration.
The Warrantholder understands that if the Company does not register with the SEC pursuant to Section 12 of the Securities Exchange
Act of 1934 (the “1934 Act”), or file reports pursuant to Section 15(d) of the 1934 Act, or if a registration
statement covering the securities under the Act is not in effect when it desires to sell (i) the rights to purchase Preferred
Stock pursuant to this Agreement or (ii) the Preferred Stock issuable upon exercise of the right to purchase, it may be required
to hold such securities for an indefinite period. The Warrantholder also understands that any sale of (A) its rights hereunder
to purchase Preferred Stock or (B) Preferred Stock issued or issuable hereunder which might be made by it in reliance upon Rule
144 promulgated under the Act may be made only in accordance with the terms and conditions of that Rule.

 

    	10

    	 

    

 

(e)  Accredited
Investor. Warrantholder is an “accredited investor” within the meaning of the Rule 501 of Regulation D promulgated
under the Act, as presently in effect.

 

(f)  Authorization.
The Warrantholder has full power and authority to enter into this Agreement. This Agreement constitutes a legal, valid and binding
agreement of the Warrantholder, enforceable in accordance with its terms.

 

(g) Agreement
to Comply with the Securities Act; Legend. The Warrantholder, by acceptance of this Warrant, agrees to comply in all respects
with the provisions of this Section 10(g) and the restrictive legend requirements set forth on the face of this Warrant and further
agrees that such Warrantholder shall not offer, sell or otherwise dispose of this Warrant or any shares of Preferred Stock or Common
Stock to be issued upon exercise hereof except under circumstances that will not result in a violation of the Act. This Warrant
and all Preferred Stock and Common Stock issued upon exercise of this Warrant (unless registered under the Act) shall be stamped
or imprinted with a legend in substantially the form set forth on the first page of this Agreement.

 

(h)  Voting
Agreement. Notwithstanding anything to the contrary contained herein, if this Warrant is exercised in whole or in part during
the term of the Third Amended and Restated Voting Agreement, dated as of December 30, 2011, among the Company, each holder of the
Company’s preferred stock and the holders of Common Stock named therein, as amended by the First Amendment to the Third Amended
and Restated Voting Agreement, dated as of January 19, 2012, among the Company, each holder of the Company’s preferred stock
and the holders of Common Stock named therein (as such agreement may be amended or amended and restated from time to time, the
“Voting Agreement”), the Warrantholder shall become a party to the Voting Agreement by executing an Adoption
Agreement or a counterpart signature page to the Voting Agreement agreeing to be bound by and subject to the terms of the Voting
Agreement and any other documents required to be executed and delivered by the Voting Agreement, all in accordance with Section
6.1 of the Voting Agreement, as such provision may be amended or amended and restated from time to time. Compliance with this Section
10(h) shall be a precondition to the exercise of this Warrant and the issuance by the Company of any securities hereunder.

 

(i)   Lock-up
Agreement. On or prior to the Effective Date, the Warrantholder shall enter into a lockup agreement in favor of the underwriters
in connection with the Company’s contemplated initial public offering, as described in the Company’s Registration Statement
on Form S-1 (333-177172), as amended, filed with the SEC.

 

SECTION 11. TRANSFERS.

 

In connection with a collateral arrangement
arising out of Warrantholder’s borrowing arrangements with its lenders, each taker and holder of this Agreement, by taking
or holding the same, consents and agrees that this Agreement, when endorsed in blank (and subject to the other transfer requirements
set forth in this Section 11), shall be deemed negotiable, and that the holder hereof, when this Agreement shall have been so endorsed
and its transfer recorded on the Company’s books, shall be treated by the Company and all other persons dealing with this
Agreement as the absolute owner hereof for any purpose and as the person entitled to exercise the rights represented by this Agreement.
Subject to compliance with applicable federal and state securities laws, the transfer conditions referred to in the legend endorsed
hereon and the transfer conditions set forth in this Section 11, this Warrant and all rights hereunder are transferable, in whole
or in part, by the Warrantholder without charge to the Warrantholder, upon surrender of this Warrant to the Company at its then
principal executive offices with a properly completed and duly executed notice of transfer in the form attached hereto as Exhibit
III (the “Transfer Notice”), together with funds sufficient to pay any transfer taxes described in Section 9(a)
in connection with the making of such transfer. Upon such compliance, surrender and delivery and, if required, such payment, the
transfer of the Warrant shall be recorded on the books of the Company and the Company shall execute and deliver a new Warrant in
the name of the assignee or assignees and in the denominations specified in such Transfer Notice, and shall issue to the assignor
a new Warrant evidencing the portion of this Warrant, if any, not so assigned and this Warrant shall promptly be cancelled. The
Warrantholder shall not transfer the Warrant or any of the rights hereunder without the prior written approval of the Company,
which approval shall not be unreasonably withheld, to any individual, person, corporation, partnership or other entity that is
a direct competitor of the Company. Notwithstanding anything to the contrary contained herein, no assignee or transferee of this
Warrant or any of the rights hereunder (except any Affiliate of Warrantholder) shall be entitled to the information rights set
forth in Section 9(i) of this Agreement or any other non-public information relating to the Company.

 

    	11

    	 

    

 

SECTION 12. MISCELLANEOUS.

 

(a)          Effective
Date. The provisions of this Agreement shall be construed and shall be given effect in all respects as if it had been executed
and delivered by the parties hereto on the date hereof. This Agreement shall be binding upon any successors and assigns of the
Company and the successors and permitted assigns of the Warrantholder.

 

(b)          Remedies.
In the event of any default hereunder, the non-defaulting party may proceed to protect and enforce its rights either by suit in
equity and/or by action at law, including but not limited to an action for damages as a result of any such default, and/or an action
for specific performance for any default where such party will not have an adequate remedy at law and where damages will not be
readily ascertainable. Each party to this Agreement expressly agrees that it shall not oppose an application by the other party
or any other person entitled to the benefit of this Agreement requiring specific performance of any or all provisions hereof or
enjoining the breaching party from continuing to commit any such breach of this Agreement.

 

(c)          No
Impairment of Rights. The Company will not, by amendment of its Charter or through any other means, avoid or seek to avoid
the observance or performance of any of the terms of this Agreement, but will at all times in a commercially reasonable manner
assist in the carrying out of all such terms.

 

(d)          Additional
Documents. The Company, upon execution of this Agreement, shall provide the Warrantholder with certified resolutions relating
to (i) the reservation of the Preferred Stock issuable upon exercise of the Warrantholder’s rights hereunder as of the Effective
Date and (ii) the authorization of the execution and delivery by the Company of this Agreement and the performance of all obligations
of the Company hereunder, including the issuance to the Warrantholder of the right to acquire the shares of Preferred Stock and
the Common Stock into which it may be converted.

 

(e)          Attorney's
Fees. In any litigation, arbitration or court proceeding between the Company and the Warrantholder relating hereto, the prevailing
party shall be entitled to attorneys' fees and expenses and all costs of proceedings incurred in enforcing this Agreement. For
the purposes of this Section 12(e), attorneys' fees shall include without limitation fees incurred in connection with the following:
(i) contempt proceedings; (ii) discovery; (iii) any motion, proceeding or other activity of any kind in connection with an insolvency
proceeding; (iv) garnishment, levy, and debtor and third party examinations; and (v) post-judgment motions and proceedings of any
kind, including without limitation any activity taken to collect or enforce any judgment.

 

    	12

    	 

    

 

(f)          Severability.
In the event any one or more of the provisions of this Agreement shall for any reason be held invalid, illegal or unenforceable,
the remaining provisions of this Agreement shall be unimpaired, and the invalid, illegal or unenforceable provision shall be replaced
by a mutually acceptable valid, legal and enforceable provision, which comes closest to the intention of the parties underlying
the invalid, illegal or unenforceable provision.

 

(g)          Notices.
Except as otherwise provided herein, any notice, demand, request, consent, approval, declaration, service of process or other communication
that is required, contemplated, or permitted under this Agreement or with respect to the subject matter hereof shall be in writing,
and shall be deemed to have been validly served, given, delivered, and received upon the earlier of: (i) the day of transmission
by facsimile or hand delivery if transmission or delivery occurs on a Business Day at or before 5:00 pm in the time zone of the
recipient, or, if transmission or delivery occurs on a non-Business Day or after such time, the first Business Day thereafter,
or the first Business Day after deposit with an overnight express service or overnight mail delivery service; or (ii) the third
calendar day after deposit in the United States mails, with proper first class postage prepaid, and shall be addressed to the party
to be notified as follows:

 

If to Warrantholder:

 

HERCULES TECHNOLOGY GROWTH CAPITAL, INC.

Legal Department

Attention: Chief Legal Officer and Manuel Henriquez

400 Hamilton Avenue, Suite 310

Palo Alto, CA 94301

Facsimile: 650-473-9194

Telephone: 650-289-3060

 

With a copy to:

 

SIDLEY AUSTIN LLP

Attn: Pamela J. Martinson

1001 Page Mill Road, Bldg. 1

Palo Alto, CA 94304

Facsimile: 650-565-7100

Telephone: 650-565-7044

 

(i)          If
to the Company:

 

GLORI ENERGY INC.

Attention: Victor M. Perez, Chief Financial
Officer

4315 South Drive

Houston, Texas 77053

Facsimile: 713-237-8585

Telephone: 832-412-1432

 

With a copy to:

 

FULBRIGHT & JAWORSKI L.L.P.

Attn: Charles D. Powell

Fulbright Tower

1301 McKinney, Suite 5100

Facsimile: 713-651-5246

Telephone: 713-651-5431

 

    	13

    	 

    

 

or to such other address as each party may designate for itself
by like notice.

 

(h)          Entire
Agreement; Amendments. This Agreement constitute the entire agreement and understanding of the parties hereto in respect of
the subject matter hereof, and supersede and replace in their entirety any prior proposals, term sheets, letters, negotiations
or other documents or agreements, whether written or oral, with respect to the subject matter hereof (including Lender's revised
proposal letter dated March 16, 2012). None of the terms of this Agreement may be amended except by an instrument executed by each
of the parties hereto.

 

(i)          Headings.
The various headings in this Agreement are inserted for convenience only and shall not affect the meaning or interpretation of
this Agreement or any provisions hereof.

 

(j)          Advice
of Counsel. Each of the parties represents to each other party hereto that it has discussed (or had an opportunity to discuss)
with its counsel this Agreement and, specifically, the provisions of Sections 12(m), 12(n), 12(o), 12(p) and 12(r).

 

(k)          No
Strict Construction. The parties hereto have participated jointly in the negotiation and drafting of this Agreement. In the
event an ambiguity or question of intent or interpretation arises, this Agreement shall be construed as if drafted jointly by the
parties hereto and no presumption or burden of proof shall arise favoring or disfavoring any party by virtue of the authorship
of any provisions of this Agreement.

 

(l)          No
Waiver. No omission or delay by a party to this Agreement at any time to enforce any right or remedy reserved to it, or to
require performance of any of the terms, covenants or provisions hereof by the other party to this Agreement at any time designated,
shall be a waiver of any such right or remedy, nor shall it in any way affect the right of such party to enforce such provisions
thereafter.

 

(m)         Survival.
Except as otherwise provided herein, all agreements set forth in Sections 10(g), 10(h) and 12(r) hereof and all representations
and warranties contained in this Agreement shall survive the execution and delivery of this Agreement and the expiration or other
termination of this Agreement.

 

(n)          Governing
Law. This Agreement has been negotiated and delivered to Warrantholder in the State of California, and shall have been accepted
by Warrantholder in the State of California. Delivery of Preferred Stock to Warrantholder by the Company under this Agreement is
due in the State of California. This Agreement shall be governed by, and construed and enforced in accordance with, the laws of
the State of California, excluding conflict of laws principles that would cause the application of laws of any other jurisdiction.

 

(o)          Consent
to Jurisdiction and Venue. All judicial proceedings arising in or under or related to this Agreement may be brought in any
state or federal court located in the State of California. By execution and delivery of this Agreement, each party hereto generally
and unconditionally: (i) consents to nonexclusive personal jurisdiction in Santa Clara County, State of California; (ii) waives
any objection as to jurisdiction or venue in Santa Clara County, State of California; and (iii) agrees not to assert any defense
based on lack of jurisdiction or venue in the aforesaid courts. Service of process on any party hereto in any action arising out
of or relating to this Agreement shall be effective if given in accordance with the requirements for notice set forth in Section
12(g), and shall be deemed effective and received as set forth in Section 12(g). Nothing herein shall affect the right to serve
process in any other manner permitted by law or shall limit the right of either party to bring proceedings in the courts of any
other jurisdiction.

 

    	14

    	 

    

 

(p)         Mutual
Waiver of Jury Trial/Judicial Reference.

 

(i)          Because disputes arising in connection
with complex financial transactions are most quickly and economically resolved by an experienced and expert person and the parties
wish applicable state and federal laws to apply (rather than arbitration rules), the parties desire that their disputes be resolved
by a judge applying such applicable laws. EACH OF THE COMPANY AND WARRANTHOLDER SPECIFICALLY WAIVE ANY RIGHT IT MAY HAVE TO TRIAL
BY JURY OF ANY CAUSE OF ACTION, CLAIM, CROSS-CLAIM, COUNTERCLAIM, THIRD PARTY CLAIM OR ANY OTHER CLAIM (COLLECTIVELY, “CLAIMS”)
ASSERTED BY THE COMPANY AGAINST WARRANTHOLDER OR ITS ASSIGNEE OR BY WARRANTHOLDER OR ITS ASSIGNEE AGAINST THE COMPANY. This waiver
extends to all such Claims, including Claims that involve Persons other than the Company and Warrantholder; Claims that arise out
of or are in any way connected to the relationship between the Company and Warrantholder; and any Claims for damages, breach of
contract, specific performance, or any equitable or legal relief of any kind, arising out of this Agreement.

 

(ii)          If the waiver of jury trial set forth
in Section 12(p)(i) is ineffective or unenforceable, the parties agree that all Claims shall be resolved by reference to a private
judge sitting without a jury, pursuant to Code of Civil Procedure Section 638, before a mutually acceptable referee or, if the
parties cannot agree, a referee selected by the Presiding Judge of the Santa Clara County, California. Such proceeding shall be
conducted in Santa Clara County, California, with California rules of evidence and discovery applicable to such proceeding.

 

(iii)        In the event Claims are to be resolved
by judicial reference, either party may seek from a court identified in Section 12(o), any prejudgment order, writ or other relief
and have such prejudgment order, writ or other relief enforced to the fullest extent permitted by law notwithstanding that all
Claims are otherwise subject to resolution by judicial reference.

 

(q)          Counterparts.
This Agreement and any amendments, waivers, consents or supplements hereto may be executed in any number of counterparts, and by
different parties hereto in separate counterparts, each of which when so delivered shall be deemed an original, but all of which
counterparts shall constitute but one and the same instrument.

 

(r)          Specific
Performance. The parties hereto hereby declare that it is impossible to measure in money the damages which will accrue to Warrantholder
by reason of the Company’s failure to perform any of the obligations under this Agreement and agree that the terms of this
Agreement shall be specifically enforceable by Warrrantholder. If Warrantholder institutes any action or proceeding to specifically
enforce the provisions hereof, any person against whom such action or proceeding is brought hereby waives the claim or defense
therein that Warrantholder has an adequate remedy at law, and such person shall not offer in any such action or proceeding the
claim or defense that such remedy at law exists.

 

[Remainder of Page Intentionally Left Blank]

 

    	15

    	 

    

 

IN WITNESS WHEREOF, the parties hereto have
caused this Agreement to be executed by its officers thereunto duly authorized as of the Effective Date.

 

	COMPANY:	GLORI ENERGY INC.
	 	 	 	 
	 	 	By:	/s/ Victor M. Perez
	 	 	 	Victor M. Perez
	 	 	 	Chief Financial Officer 

 

	WARRANTHOLDER:	HERCULES TECHNOLOGY GROWTH CAPITAL, INC.
	 	 	 	 
	 	 	By:	/s/ K. Nicholas Martitsch
	 	 	 	 
	 	 	 	K. Nicholas Martitsch
	 	 	Title:	Associate General Counsel

 

    	16

    	 

    

 

EXHIBIT I

 

NOTICE OF EXERCISE

 

		To:	[____________________________]

 

		(1)	The undersigned Warrantholder hereby elects to purchase
[_______] shares of the Series [__] Preferred Stock of [_________________], pursuant to the terms of the Agreement dated the [___]
day of [______, _____] (the “Agreement”) between [_________________] and the Warrantholder, and [CASH PAYMENT: tenders
herewith payment of the Purchase Price in full, together with all applicable transfer taxes, if any.] [NET ISSUANCE: elects pursuant
to Section 3(a) of the Agreement to effect a Net Issuance.]

 

		(2)	Please issue a certificate or certificates representing
said shares of Series [__] Preferred Stock in the name of the undersigned or in such other name as is specified below and that
Warrant Coverage in the amount of $[         ] remains under the Agreement.

 

		(3)	In connection with the exercise of the Warrant, the Warrantholder
hereby confirms that each of the representations and warranties made by the Warrantholder in Section 10(a) through Section 10(e)
of the Agreement are accurate in all respects as of the date of this Notice of Exercise as if made on the date hereof.

 

	 	 
	 	(Name) 
	 	 
	 	 
	 	(Address) 

 

WARRANTHOLDER:           HERCULES TECHNOLOGY GROWTH CAPITAL,
INC.

 

	 	By:	 
	 	 	 
	 	Title:	 
	 	 	 
	 	Date:	 

 

    	17

    	 

    

 

EXHIBIT II

 

ACKNOWLEDGMENT OF EXERCISE

 

The undersigned [____________________________________], hereby
acknowledge receipt of the “Notice of Exercise” from Hercules Technology Growth Capital, Inc. to purchase [____] shares
of the Series [__] Preferred Stock of [_________________], pursuant to the terms of the Agreement, and further acknowledges that
[$______] of Warrant Coverage remains subject to the terms of the Agreement.

 

	COMPANY:	GLORI ENERGY, INC. 
	 	 	 
	 	By:	 
	 	 	 
	 	Title:	 
	 	 	 
	 	Date:	 

 

    	18

    	 

    

 

EXHIBIT III

 

TRANSFER NOTICE

 

(To transfer or assign the foregoing Agreement execute this
form and supply required information. Do not use this form to purchase shares.)

 

FOR VALUE RECEIVED, the foregoing Agreement and all rights evidenced
thereby are hereby transferred and assigned to

 

_________________________________________________________________

(Please Print)

 

whose address is___________________________________________________

 

_________________________________________________________________

 

Dated: ____________________________________

 

Holder's Signature:    _______________________________

 

Holder's Address:     _______________________________

 

_____________________________________________________

 

Signature Guaranteed: ____________________________________________

 

NOTE: The signature to this Transfer Notice must correspond
with the name as it appears on the face of the Agreement, without alteration or enlargement or any change whatever. Officers of
corporations and those acting in a fiduciary or other representative capacity should file proper evidence of authority to assign
the foregoing Agreement.

 

    	19Execution Version 

 

CONVERTIBLE NOTE PURCHASE AGREEMENT

 

This Convertible
Note Purchase Agreement (the “Agreement”) is made and entered into as of May 31, 2011, by
and among Glori Energy Inc. (f/k/a Glori Oil Limited), a Delaware corporation (the “Company”), and Energy Technology
Ventures, LLC, a Delaware limited liability company (the “Purchaser”).

 

A.            The
Company currently requires funds for product development and other general corporate purposes.

 

B.             The
Purchaser is willing to advance funds to the Company in exchange for the issuance to it of a convertible promissory note evidencing
the Company’s obligation to repay the Purchaser’s loan of the advanced funds, all as provided in this Agreement.

 

NOW THEREFORE, the parties hereby agree
as follows:

 

ARTICLE 1

 

PURCHASE, SALE AND TERMS OF NOTE

 

1.01         The
Note. The Company has authorized the issuance and sale to the Purchaser of the Company’s Convertible Promissory Note,
in the original aggregate principal amount of $1,500,000, in the form attached hereto as Exhibit A (the “Note”).

 

1.02         Purchase
and Sale of the Note.

 

(a)     The
Closing. The Company agrees to issue and sell to the Purchaser, and, subject to and in reliance upon the representations,
warranties, covenants, terms and conditions of this Agreement, the Purchaser agrees to purchase the Note in the principal amount
of $1,500,000 (such amount, the “Purchase Price”). Such purchase and sale shall take place at a closing (the
“Closing”) to be held at the Washington D.C. offices of Goodwin Procter LLP, on the date hereof at 12:00
p.m., local time, or at such other time or place as may be mutually agreed upon by the Company and the Purchaser. At the Closing,
the Purchaser will deliver to the Company, as payment in full for the Note to be purchased by the Purchaser at the Closing, an
amount equal to the Purchase Price by wire transfer of immediately available funds to the Company. At the Closing, the Company
will issue and deliver to the Purchaser the duly executed Note. The Company shall send the Note to the Purchaser at the address
furnished to the Company for that purpose.

 

    	 

    	 

    

 

1.03         No
Usury. Each of this Agreement and the Note issued pursuant to the terms of this Agreement is hereby expressly limited so that
in no event whatsoever, whether by reason of deferment or advancement of loan proceeds, acceleration of maturity of the loan evidenced
hereby, or otherwise, shall the amount paid or agreed to be paid to the Purchaser hereunder for the loan, use, forbearance or
detention of money exceed the maximum interest rate permitted by the laws of the State of New York. If at any time the performance
of any provision hereof or any Note involves a payment exceeding the limit of the price that may be validly charged for the loan,
use, forbearance or detention of money under applicable law, then automatically and retroactively, ipso facto, the agreed upon
interest rate as set forth in the Note shall be reduced to such limit, it being the specific intent of the Company and the Purchaser
hereof that all payments by the Company under the Note shall be applied first to any fees and expenses due and payable thereunder,
then to the accrued interest due and payable thereunder and the remainder, if any, to the outstanding principal. All payments
by the Company under the Note shall be made without set-off or counterclaim and be free and clear and without any deduction or
withholding for any taxes or fees of any nature whatever, unless the obligation to make such deduction or withholding is imposed
by law.

 

ARTICLE 2

 

CONDITIONS TO THE PURCHASER’S OBLIGATIONS

 

The obligations of the Purchaser to purchase
and pay for the Note to be purchased by it at the Closing are subject to the fulfillment or waiver, on or before the Closing, of
each of the following conditions:

 

2.01         Representations
and Warranties. Each of the representations and warranties of the Company set forth in Article 3 hereof shall be true in all
material respects on the date of the Closing.

 

2.02         Performance
by the Company. The Company shall have performed and complied in all material respects with all agreements, obligations and
conditions contained in this Agreement that are required to be performed or complied with by it on or before the Closing and shall
have obtained all approvals, consents and qualifications necessary to complete the purchase and sale described herein.

 

2.03         Delivery
of Note. The Company shall have executed and delivered to the Purchaser the Note, in the form attached hereto as Exhibit
A.

 

ARTICLE 3

 

REPRESENTATIONS AND WARRANTIES OF THE
COMPANY

 

The Company represents and warrants to the
Purchaser as follows, each of which representation and warranty is true and correct as of the date hereof:

 

(a)     The Company
is a corporation duly organized, validly existing, and in good standing in the State of Delaware.

 

(b)     The Company
has the corporate power and authority to own and operate its properties and to carry on its business as now conducted and as currently
proposed to be conducted.

 

    	2

    	 

    

 

(c)     The Company
has all requisite legal and corporate power and authority to execute and deliver this Agreement and the Note and to carry out and
perform its obligations under the terms of this Agreement and the Note.

 

(d)     The execution
and delivery of this Agreement and the Note by the Company and the consummation of the transactions contemplated hereby and thereby
have been duly authorized by all requisite corporate action on the part of the Company. Each of this Agreement and the Note has
been duly executed and delivered by the Company and constitutes the valid and binding obligation of the Company, enforceable against
the Company in accordance with its terms, except to the extent that such enforcement may be subject to applicable bankruptcy, insolvency,
reorganization, moratorium, or other laws of general application relating to or affecting enforcement of creditors’ rights
and laws concerning equitable remedies. The execution and delivery of this Agreement and the Note by the Company and the consummation
of the transactions contemplated hereby and thereby will not (i) result in a material violation of any provision of law, any order
of any court or other agency of government, the certificate of incorporation or bylaws of the Company, (ii) result in a material
violation of any provision of any indenture, agreement or other instrument to which the Company, or any of its properties or assets
is bound, or result in a material breach of or constitute (with due notice or lapse of time or both) a default under any such indenture,
agreement or other instrument, or result in the creation or imposition of any lien, charge, restriction, encumbrance, or, to the
Company’s knowledge, claim of any nature whatsoever upon any of the properties or assets of the Company, or (iii) require
the consent or approval of any third party. 

 

ARTICLE 4 

 

REPRESENTATIONS AND WARRANTIES OF THE
PURCHASER 

 

4.01         Representations
of the Purchaser. The Purchaser represents and warrants to the Company as follows, each of which representation and warranty
is true and correct as of the date hereof: 

 

(a)     The Purchaser
has full power and authority to enter into and perform this Agreement in accordance with its terms, and it was not organized for
the specific purpose of acquiring the Note or any securities issuable upon conversion of the Note. 

 

(b)     This Agreement
has been duly executed and delivered by it and constitutes the legal, valid and binding obligation of it, enforceable in accordance
with the terms of the Agreement. 

 

(c)     The Purchaser
is an “accredited investor” as that term is defined in Rule 501 promulgated under the Securities Act of 1933, as amended.

 

(d)     The Note
is being acquired by the Purchaser, and any securities issuable upon conversion of the Note will be acquired by the Purchaser,
for investment for the Purchaser’s own account, not as a nominee or agent, and not with a view to the resale or distribution
of any part thereof, and that the Purchaser has no present intention of selling, granting any participation in, or otherwise distributing
the same. The Purchaser further represents that the Purchaser does not presently have any contract, undertaking, agreement or arrangement
with any person to sell, transfer or grant participations to such person or to any third person, with respect to any securities
issuable upon conversion of the Note.

 

    	3

    	 

    

 

(e)     The
Purchaser has had an opportunity to discuss the Company’s business, management, financial affairs and the terms and conditions
of the issuance of the Note with the Company’s management and has had an opportunity to review the Company’s facilities.

 

(f)      The Purchaser
understands that any securities issuable upon conversion of the Note have not been, and will not be, registered under the Securities
Act, by reason of a specific exemption from the registration provisions of the Securities Act which depends upon, among other things,
the bona fide nature of the investment intent and the accuracy of the Purchaser’s representations as expressed herein. The
Purchaser understands that any securities issuable upon conversion of the Note are “restricted securities” under applicable
U.S. federal and state securities laws and that, pursuant to these laws, the Purchaser must hold any securities issuable upon conversion
of the Note indefinitely unless they are registered with the Securities and Exchange Commission and qualified by state authorities,
or an exemption from such registration and qualification requirements is available. The Purchaser acknowledges that the Company
has no obligation to register or qualify any securities issuable upon conversion of the Note for resale except as set forth in
the Rights Agreement (as defined below).

 

(g)     The Purchaser
understands that no public market now exists for any securities issuable upon conversion of the Note, and that the Company has
made no assurances that a public market will ever exist for any such securities.

 

(h)     The Purchaser
understands that any securities issuable upon conversion of the Note, may bear one or all of the following legends, or legends
to the following effect:

 

(A)      “THE SECURITIES REPRESENTED
BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED OR QUALIFIED UNDER THE SECURITIES ACT OF 1933 OR APPLICABLE STATE SECURITIES LAWS.
SUCH SECURITIES MAY NOT BE TRANSFERRED OR OTHERWISE DISPOSED OF UNLESS THEY HAVE BEEN SO REGISTERED AND QUALIFIED OR PURSUANT TO
AN EXEMPTION FROM SUCH REGISTRATION OR QUALIFICATION. THE COMPANY SHALL BE ENTITLED TO REQUIRE AN OPINION OF COUNSEL REASONABLY
SATISFACTORY TO IT WITH RESPECT TO COMPLIANCE OF ANY PROPOSED SALE OR TRANSFER WITH THE REQUIREMENTS OF THE SECURITIES ACT.”

 

(B)      Any legend required by the securities
laws of any state to the extent such laws are applicable to any securities issuable upon conversion of the Note represented by
the certificate so legended.

 

    	4

    	 

    

 

 

ARTICLE 5 

 

COVENANTS OF THE COMPANY 

 

5.01         Affirmative
Covenants. Until the Note is converted pursuant to the provisions of Section 3 of the Note or all obligations thereunder are
repaid in full, the Company hereby covenants to do the following:

 

(a)     Notice of
Default. The Company shall provide to the Purchaser, within five (5) business days of becoming aware of the occurrence thereof,
notice of any Event of Default (as defined in Article 6).

 

(b)     Hiring of
Chief Financial Officer or Controller. The Company shall use its commercially reasonable efforts, on or before the Maturity
Date (as defined in the Note), to hire a Chief Financial Officer or Controller who is reasonably acceptable to the Company’s
Board of Directors.

 

(c)     Pilot Project
Updates. The Company shall track the performance and costs of its active pilot projects and deliver a report of such performance
and costs (the “Pilot Project Report”) to the Board of Directors of the Company within thirty (30) calendar
days after the end of each fiscal quarter, and the Company shall deliver the Pilot Project Report to the Purchaser within ten
(10) calendar days after the delivery of the Pilot Project Report to the Board of Directors of the Company.

 

(d)     Insurance.
The Company shall maintain in full force and effect insurance coverage that is adequate by industry standards for similarly situated
businesses.

 

(e)     Information
and Inspection Rights. The Company shall (i) deliver the same reports to the Purchaser as are required to be delivered to
Major Investors (as such term is defined in that certain Second Amended and Restated Investors’ Rights Agreement, dated
as of October 15, 2009, by and among the Company and the Purchasers named therein, as amended by that certain Amendment No. 1,
dated as of the same date hereof (such agreement, as amended, the “Rights Agreement”) pursuant to Section 3.1
of the Rights Agreement, and (ii) provide the Purchaser with the same visitation and inspection rights that are provided to Major
Investors (as such term is defined in the Rights Agreement) pursuant to Section 3.2 of the Rights Agreement.

 

(f)      Maintain
Existence. The Company shall reserve and keep in full force and effect its existence as a corporation in good standing and
its right to conduct its business in all jurisdictions in which it conducts business except to the extent that the failure to
do so would not have a material adverse effect on the Company.

 

(g)     Licenses.
The Company shall keep all licenses needed to operate the Company’s business valid and in full force and effect except to
the extent that the failure to do so would not have a material adverse effect on the Company.

 

(h)     Compliance
with Laws. The Company will comply in all material respects with the requirements of all applicable laws, rules, regulations
and orders of any governmental authority.

 

    	5

    	 

    

 

(i)      Tax.
The Company will timely file any and all tax returns and timely pay any and all taxes; provided, however, that the Company will
not be required to pay any such tax so long as (i) such tax is not yet due and payable without penalty or interest, or (ii) the
legality of such tax will be contested in good faith and the Company has established adequate reserves with respect to such contested
tax.

 

5.02         Negative
Covenants. Until the Note is converted or all obligations thereunder are repaid in full, the Company hereby covenants that,
from the period beginning on the date hereof and ending on the Maturity Date (as defined in the Note) or any earlier conversion
or permitted repayment of the Note in full, neither the Company nor any of its subsidiaries shall, without obtaining the Purchaser’s
prior written consent, which such consent shall not be unreasonably withheld, delayed or conditioned, become a party to any other
instrument or agreement that evidences or otherwise incurs indebtedness for borrowed money that is senior or pari passu to the
indebtedness evidenced by the Note excluding trade payables and other obligations incurred in the ordinary course of business.

 

ARTICLE 6 

 

EVENTS OF DEFAULT 

 

6.01        Events
of Default. The occurrence of any of the following events shall constitute an “Event of Default” under
this Agreement:

 

(a)     The Company
shall fail to pay all principal and interest due at the Maturity Date (as defined in the Note);

 

(b)     There shall occur
any failure by the Company to perform any of its obligations under this Agreement or the Note promptly when due which failure
(i) cannot be cured or (ii) if curable, is not cured by the Company within sixty (60) days after written notice thereof is delivered
by the Purchaser to the Company describing such failure in reasonable detail (provided, that notwithstanding the foregoing,
any failure by the Company to perform its obligations under Section 5.02 hereof shall automatically be deemed to be an
“Event of Default” without any period for cure; provided, further, no Event of Default pursuant
to Section 6.1(a) above shall be subject to cure);

 

(c)     There shall
be any material breach or inaccuracy of the representations and warranties of the Company contained in this Agreement or contained
in that certain First Amendment to Series B Preferred Stock Purchase Agreement, dated as of the same date hereof, by and among
the Company and the Purchasers named therein.

 

(d)     The Company
shall (i) voluntarily terminate operations or apply for or consent to the appointment of, or the taking of possession by, a receiver,
custodian, trustee or liquidator of it or of all or substantially all of its assets, (ii) be generally unable to pay its debts
as the debts become due, (iii) make a general assignment for the benefit of its creditors, (iv) commence a voluntary case under
the Federal Bankruptcy Code of the United States as now or hereafter in effect (the “Bankruptcy Code”), (v)
file a petition seeking to take advantage of any other law relating to bankruptcy, insolvency, reorganization, winding-up, or composition
or adjustment of debts, (vi) fail to controvert within ninety (90) days, or acquiesce in writing to, any petition filed against
it in an involuntary case under the Bankruptcy Code or other applicable bankruptcy law or (vii) take any corporate action for the
purpose of effecting any of the foregoing;

 

    	6

    	 

    

 

(e)     Without
its application, approval or consent, a proceeding shall be commenced, in any court of competent jurisdiction, seeking in respect
of the Company the liquidation, reorganization, dissolution, winding up, or composition or readjustment of debt, the appointment
of a trustee, receiver, liquidator or the like of such entity or of all or any substantial part of its assets, or other like relief
in respect of such entity under any law relating to bankruptcy, insolvency, reorganization, winding-up, or composition or adjustment
of debts; and, if the proceeding is being contested in good faith by such entity, the same shall continue undismissed, or unstayed
and in effect for any period of sixty (60) consecutive days, or an order for relief against such entity shall be entered in any
case under the Bankruptcy Code or other applicable bankruptcy law; or

 

(f)      Any material
default or event of default under any other instrument or agreement to which the Company or any subsidiary is a party that evidences
indebtedness in excess of $250,000 that has not otherwise been forgiven or cured within 30 days of the date of such default or
event of default.

 

ARTICLE 7 

 

MISCELLANEOUS 

 

7.01         No
Waiver; Cumulative Remedies. No failure or delay on the part of any party to this Agreement in exercising any right, power
or remedy hereunder shall operate as a waiver hereof; nor shall any single or partial exercise of any such right, power or remedy
preclude any other or further exercise thereof or the exercise of any other right, power or remedy hereunder. The remedies herein
provided are cumulative and not exclusive of any remedies provided by law.

 

7.02         Amendments,
Waivers and Consents. Any provision in this Agreement to the contrary notwithstanding, changes in or additions to this Agreement
or the Note may only be made, and compliance with any covenant or provision herein or therein set forth may only be omitted or
waived, in writing signed by the Company and the Purchaser. Any amendment or waiver effected in accordance with this Section
7.02 shall be binding upon the holder of Note then outstanding and any future holder of the Note, and the Company.

 

7.03         Addresses
for Notices. Any notice required or permitted hereunder shall be given in writing and shall be conclusively deemed effectively
given upon personal delivery or delivery by courier, or on the first business day after transmission if sent by confirmed facsimile
transmission, or four (4) business days after deposit in the United States mail, by registered or certified mail, postage prepaid,
addressed to the address set forth below the Company’s and the Purchaser’s name on the signature page of this Agreement,
or at such other address as the Company or the Purchaser may designate by advance written notice to the other party hereto.

 

    	7

    	 

    

 

For purposes of this Section 7.03, a “business
day” means a weekday on which banks are open for general banking business in New York City, New York.

 

7.04         Binding
Effect; Assignment. The terms and conditions of this Agreement shall be binding upon and inure to the benefit of the Company
and the Purchaser and their respective heirs, successors and assigns.

 

7.05         Headings;
Interpretation. In this Agreement, (i) the meaning of defined terms shall be equally applicable to both the singular and plural
forms of the terms defined; (ii) the captions and headings are used only for convenience and are not to be considered in construing
or interpreting this Agreement and (iii) the words “including,” “includes” and “include” shall
be deemed to be followed by the words “without limitation”. All references in this Agreement to sections, paragraphs,
exhibits and schedules shall, unless otherwise provided, refer to sections and paragraphs hereof and exhibits and schedules attached
hereto, all of which exhibits and schedules are incorporated herein by this reference.

 

7.06         No
Finder’s Fees. Each party represents that it neither is nor will be obligated for any finder’s or broker’s
fee or commission in connection with the transactions contemplated by this Agreement. The Purchaser agrees to indemnify and to
hold harmless the Company from any liability for any commission or compensation in the nature of a finder’s or broker’s
fee (and any asserted liability) for which the Purchaser or any of its directors, officers, partners, members, employees or representatives
is responsible. The Company agrees to indemnify and hold harmless the Purchaser from any liability for any commission or compensation
in the nature of a finder’s or broker’s fee (and any asserted liability) for which the Company or any of its officers,
employees or representatives is responsible.

 

7.07         Survival
of Representations and Warranties. All representations and warranties made in this Agreement or the Note, or made in any other
instrument or document delivered in connection herewith or therewith, shall survive the execution and delivery hereof or thereof,
and the Closing, and shall in no way be affected by any investigation of the subject matter thereof made by or on behalf of the
Purchaser or the Company, as the case may be.

 

7.08         Prior
Agreements. This Agreement and the Note (including any provisions of other agreements specifically referred to herein or therein)
constitute the entire agreement between the parties and supersedes any other prior understandings or agreements concerning the
subject matter hereof.

 

7.09         Severability.
The invalidity or unenforceability of any provision hereof shall in no way affect the validity or enforceability of any other
provision.

 

7.10         Governing
Law. This Agreement shall be governed by, and construed in accordance with, the Delaware General Corporation Law as to matters
within the scope thereof, and as to all other matters shall be governed by, and construed in accordance with, the internal laws
of the State of New York, without reference to principles of conflict of laws or choice of laws.

 

7.11         Payment
of Fees. At the Closing, all reasonable and documented expenses, including legal fees and out of pocket expenses of the counsel
for the Purchaser, related to the financing to which this Agreement and the Note relate, incurred by the Purchaser, up to an aggregate
maximum amount of $10,000, shall be paid by the Company.

 

    	8

    	 

    

 

7.12         Counterpart;
Facsimile Signatures. This Agreement may be executed in any number of counterparts, each of which shall be deemed an original,
but all of which taken together shall constitute one and the same instrument, and any of the parties hereto may execute this Agreement
by signing any such counterpart. This Agreement may be executed and delivered by facsimile, or by e-mail in portable document
format (.pdf) or other electronic means, and delivery of the signature page by such method shall be deemed to have the same effect
as if the original signature had been delivered to the other parties.

 

7.13         Entire
Agreement. This Agreement, together with all exhibits hereto and the Note, constitutes the entire agreement and understanding
of the parties with respect to the subject matter hereof and supersede any and all prior negotiations, correspondence, agreements,
understandings, duties or obligations between the parties with respect to the subject matter hereof.

 

7.14         Further
Assurances. From and after the date of this Agreement, upon the request of the Purchaser or the Company, the Company and the
Purchaser shall execute and deliver such instruments, documents or other writings as may be reasonably necessary or desirable
to confirm and carry out and to effectuate fully the intent and purposes of this Agreement.

 

[REMAINDER OF THIS PAGE INTENTIONALLY LEFT
BLANK]

 

    	9

    	 

    

 

IN WITNESS WHEREOF, the parties hereto have executed this Agreement
on the day, month and year first above written.

 

	 	Company:

	 	 
	 	By:	/s/ Stuart Page 
	 	 	Stuart Page 
	 	 	Chief Executive Officer
	 	 	 
	 	Address:  4315 South drive
	 	                 Houston, Tx 77053
	 	 	 
	 	ENERGY TECHNOLOGY VENTURES, LLC
	 	 	 
	 	By:	/s/ Patrick Goff
	 	Name:	Patrick Goff
	 	Title:	Senior Vice President
	 	 
	 	Address:
	 	 
	 	c/o GE Capital, Equity
	 	Attn: Account Manager, Equity
	 	201 Merritt 7
	 	Norwalk, CT 06851
	 	Fax: (203) 956-4005
	 	 
	 	With a copy to (which shall not constitute notice):
	 	 
	 	c/o GE energy Financial Services
	 	Attn: Portfolio Manager, VC
	 	800 Long Ridge Road
	 	Stamford, CT 06927
	 	Fax: (203) 585-0758

 

Signature Page to Glori Oil Note Purchase
Agreement

 

    	 

    	 

    

 

Exhibit A

 

Form of Convertible Promissory Note

 

    	A-1

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