Document:

exv10w1

Exhibit 10.1

Execution Version

REGISTRATION RIGHTS AGREEMENT

     THIS REGISTRATION RIGHTS AGREEMENT (this “Agreement”) is made and entered into as of June 22,
2010, by and between Oasis Petroleum Inc., a Delaware corporation (the “Company”), and OAS Holding
Company LLC, a Delaware limited liability company (“Holding”).

W I T N E S S E T H :

     WHEREAS, the Company and Holding have entered into a Contribution Agreement dated the date
hereof (the “Contribution Agreement”) pursuant to which, among other things, Holding will
contribute to the Company 100% of the membership interests in Oasis Petroleum LLC in exchange for
common stock of the Company, $0.01 per share par value (“Common Stock”);

     WHEREAS, Holding would not enter into the transactions contemplated by the Contribution
Agreement without this Agreement which requires the Company to register for resale to the public
the Common Stock that it receives in the transactions contemplated by the Contribution Agreement.

     NOW, THEREFORE, in consideration of the premises and the mutual covenants of the parties
hereto, and for other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, the parties hereto hereby agree as follows:

1. Definitions. Unless otherwise defined herein, as used in this Agreement, the
following terms shall have the following meanings:

     “Affiliate” means, as to any specified Person, (i) any Person that directly, or indirectly
through one or more intermediaries, controls or is controlled by, or is under common control with,
the specified Person, (ii) any executive officer, director, trustee or general partner of the
specified Person and (iii) any legal entity for which the specified Person acts as an executive
officer, director, trustee or general partner. For purposes of this definition, “control”
(including the correlative meanings of the terms “controlled by” and “under common control with”),
as used with respect to any Person, means the possession, directly, or indirectly through one or
more intermediaries, of the power to direct or cause the direction of the management and policies
of such Person, whether by contract, through the ownership of voting securities, partnership
interests or other equity interests or otherwise.

     “Agreement” is defined in the introductory paragraph of this Agreement.

     “Business Day” means each Monday, Tuesday, Wednesday, Thursday and Friday that is not a day on
which banking institutions in New York, New York are authorized or obligated by applicable law,
regulation or executive order to close.

     “Commission” means the Securities and Exchange Commission.

 

 

     “Common Stock” is defined in the recitals of this Agreement.

     “Company” is defined in the introductory paragraph of this Agreement, and includes any
successor thereto.

     “Controlling Person” is defined in Section 5(a).

     “Demand Date” is the date that Holding demands mandatory shelf registration rights pursuant to
Section 2(a).

     “End of Suspension Notice” is defined in Section 4(b).

     “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and
regulations promulgated by the Commission pursuant thereto.

     “FINRA” means the Financial Industry Regulatory Authority.

     “Free Writing Prospectus” means a free writing prospectus, as defined in Rule 405 under the
Securities Act.

     “Holding” is defined in the recitals of this Agreement.

     “Indemnified Party” is defined in Section 5(c).

     “Indemnifying Party” is defined in Section 5(c).

     “Issuer Free Writing Prospectus” means an issuer free writing prospectus, as defined in Rule
433 under the Securities Act.

     “Liabilities” is defined in Section 5(a).

     “Lock-up Expiration Date” is defined in Section 2(a).

     “Mandatory Shelf Registration Statement” is defined in Section 2(a).

     “No Objections Letter” is defined in Section 3(t).

     “Permitted Free Writing Prospectus” is defined in Section 3.

     “Person” means an individual, limited liability company, partnership, corporation, trust,
unincorporated organization, government or agency or political subdivision thereof, or any other
legal entity.

     “Piggyback Registration Statement” is defined in Section 2(b).

     “Prospectus” means the prospectus included in any Registration Statement, including any
preliminary prospectus, and all other amendments and supplements to any such prospectus,

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including post-effective amendments, and all material incorporated by reference or deemed to be incorporated
by reference, if any, in such prospectus.

     “Purchaser Indemnitee” is defined in Section 5(a).

     “Registrable Shares” means the shares of Common Stock issued to Holding in connection with the
Transaction, and any shares or other securities issued in respect of such Registrable Shares
because of or in connection with any stock dividend, stock distribution, stock split, purchase in
any rights offering or in connection with any exchange for or replacement of such Registrable
Shares or any combination of shares, recapitalization, merger or consolidation, or any other equity
securities issued pursuant to any other pro rata distribution with respect to the Common Stock,
until, with respect to a Registrable Share, the earliest to occur of:

     (i) the date on which it has been sold pursuant to a Registration Statement or
eligible for sale pursuant to Rule 144 (or any successor provision) under the
Securities Act without restriction pursuant to such rule on the volume of securities
that may be sold in any single transaction; or

     (ii) the date on which it is sold to the Company or its subsidiaries.

     “Registration Expenses” means any and all expenses incident to the performance of or
compliance with this Agreement, including: (i) all Commission, securities exchange, FINRA
registration, listing, inclusion and filing fees, (ii) all fees and expenses incurred in connection
with compliance with international, federal or state securities or blue sky laws (including any
registration, listing and filing fees and reasonable fees and disbursements of counsel in
connection with blue sky qualification of any of the Registrable Shares and the preparation of a
blue sky memorandum and compliance with the rules of FINRA), (iii) all expenses of any Persons in
preparing or assisting in preparing, word processing, duplicating, printing, delivering and
distributing any Registration Statement, any Prospectus, any amendments or supplements thereto, any
underwriting agreements, securities sales agreements, certificates and any other documents relating
to the performance under and compliance with this Agreement, (iv) all fees and expenses incurred in
connection with the listing or inclusion of any of the Registrable Shares on the New York Stock
Exchange pursuant to Section 3(n), (v) the fees and disbursements of counsel for the
Company and of the independent public accountants of the Company (including the expenses of any
special audit and “cold comfort” letters required by or incident to such performance) and (vi) any
fees and disbursements customarily paid in issues and sales of securities (including the fees and
expenses of any experts retained by the Company in connection with any Registration Statement),
provided, however, that Registration Expenses shall exclude brokers’ or underwriters’
discounts and commissions and transfer taxes, if any, relating to the sale or disposition of
Registrable Shares by Holding and the fees and disbursements of any counsel to Holding other than
as provided for in clause (v) above.

     “Registration Statement” means any Mandatory Shelf Registration Statement or Piggyback
Registration Statement.

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     “Rule 144”, “Rule 158”, “Rule 415”, or “Rule 424”, respectively, means such specified rule
promulgated by the Commission pursuant to the Securities Act, as such rule may be amended from time
to time, or any similar rule or regulation hereafter adopted by the Commission as a replacement
thereto having substantially the same effect as such rule.

     “Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations
promulgated by the Commission thereunder.

     “Suspension Event” is defined in Section 4(b).

     “Suspension Notice” is defined in Section 4(b).

     “Underwriting Agreement” is defined in Section 2(a).

     “Underwritten Offering” means a sale of securities of the Company to an underwriter or
underwriters for reoffering to the public.

2. Registration Rights.

     (a) Mandatory Shelf Registration Rights. At any time after the expiration of the
restrictions set forth in Section 3 of the Underwriting Agreement (the “Underwriting Agreement”),
dated June 16, 2010, by and among the Company, Holding, and the Underwriters party thereto (the
“Lock-up Expiration Date”), Holding may demand that the Company file with the Commission a shelf
registration statement on Form S-1 or such other form under the Securities Act then available to
the Company providing for the resale of the Registrable Shares pursuant to Rule 415 of the
Securities Act from time to time by Holding (including the Prospectus, amendments and supplements
to such registration statement or Prospectus, including pre- and post-effective amendments, all
exhibits thereto and all material incorporated by reference or deemed to be incorporated by
reference, if any, in such registration statement, the “Mandatory Shelf Registration Statement”).
If the Company has an effective Mandatory Shelf Registration Statement on Form S-1 under the
Securities Act and becomes eligible to use Form S-3 or such other short-form registration statement
form under the Securities Act, the Company shall promptly give notice of such eligibility to
Holding and may, in its sole discretion, convert such Mandatory Shelf Registration Statement on
Form S-1 to a registration statement on Form S-3 or such other short-form registration statement by
means of a post-effective amendment or otherwise, unless Holding notifies the Company within 10
Business Days of receipt of the Company notice that such conversion would interfere with its
distribution of Registrable Shares already in progress and provides a reasonable explanation
therefor, in which case the Company will delay the conversion of the Mandatory Shelf Registration
Statement for a reasonable time after receipt of the first such notice, not to exceed 30 days in
the aggregate.

          (i) Effectiveness and Scope. The Company shall use its commercially reasonable
efforts to cause the Mandatory Registration Statement to be declared effective by the Commission
within 120 days following the Demand Date and to remain effective until the date on which all
Shares in respect thereof cease to be Registrable Shares. The Mandatory Shelf Registration
Statement shall provide for the resale from time to time, and pursuant to any method
or combination of methods legally available (including an Underwritten Offering, a direct sale
to

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purchasers, a sale through brokers or agents, or a sale over the internet), by Holding, as
agreed to by Holding and its counsel.

          (ii) Underwriting. If Holding proposes to conduct an Underwritten Offering under the
Mandatory Shelf Registration Statement, Holding shall advise the Company of the managing
underwriters for such proposed Underwritten Offerings. In such event, the Company shall enter into
an underwriting agreement in customary form with the managing underwriters, which shall include,
among other provisions, indemnities to the effect and to the extent provided in Section 5
and shall take all such other reasonable actions as are requested by the managing underwriter in
order to expedite or facilitate the registration and disposition of the Registrable Shares included
in such Underwritten Offering; provided, however, that the Company shall be required to
cause appropriate officers of the Company or its Affiliates to participate in a “road show” or
similar marketing effort being conducted by such underwriter with respect to such Underwritten
Offering only if Holding and any other Persons, if any, who are participating in the Underwritten
Offering reasonably anticipate gross proceeds from such Underwritten Offering of at least $20
million; provided, further, the Company shall not be required to cause such officers of the
Company or its Affiliates to participate in a “road show” or similar marketing effort being
conducted by such underwriter with respect to such Underwritten Offering more than twice in a 365
day period. If Holding proposes to distribute its Registrable Shares through such Underwritten
Offering, it shall enter into an underwriting agreement in customary form with the managing
underwriters selected for such underwriting and complete and execute any questionnaires, powers of
attorney, indemnities, securities escrow agreements and other documents reasonably required under
the terms of such underwriting, and furnish to the Company such information in writing as the
Company may reasonably request for inclusion in the Registration Statement; provided,
however, that Holding shall not be required to make any representations or warranties to or
agreements with the Company or the underwriters other than representations, warranties or
agreements as are customary and reasonably requested by the underwriters. Notwithstanding any other
provision of this Agreement, with respect to an Underwritten Offering in connection with the
Mandatory Shelf Registration Statement, if the managing underwriters determine in good faith that
marketing factors require a limitation on the number of shares to be included in such Underwritten
Offering, then the managing underwriters may exclude shares (including Registrable Shares) from the
Underwritten Offering, and any shares included in the Underwritten Offering shall be allocated to
Holding to the extent of its requested amount of Registrable Shares to be included in the
Underwritten Offering.

     (b) Piggyback Registration Rights.

          (i) Piggyback Registration. If, after the date hereof, the Company proposes (A) to
file a registration statement under the Securities Act providing for a public offering of the
Company’s equity securities, other than a registration statement on Form S-8 or Form S-4 or any
similar form hereafter adopted by the Commission as a replacement therefor (including the
Prospectus, amendments and supplements to such registration statement or Prospectus, including pre-
and post-effective amendments, all exhibits thereto and all material incorporated by reference or
deemed to be incorporated by reference, if any, in such registration statement, the “Piggyback
Registration Statement”) or (B) conduct and Underwritten Offering pursuant to a Piggyback
Registration Statement, the Company will notify Holding of the proposed filing and
Holding shall be given an opportunity to include in such Piggyback Registration Statement or

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Underwritten Offering, as applicable, all or any part of Holding’s Registrable Shares;
provided, however, that the Company shall not be required to provide such notice and
Holding shall not be given an opportunity to include in such Piggyback Registration Statement to
the extent Company has been advised by the managing underwriter of such Underwritten Offering that
the inclusion of any Registrable Shares for sale for the benefit of Holding will have a materially
adverse effect on the price, timing, marketing or distribution of the Common Stock. If EnCap
Energy Capital Fund VI, L.P. (“EnCap”) has an Affiliate who is an officer or director of the
Company, within ten (10) Business Days after delivery of the above-described notice by the Company,
Holding has the right to notify the Company in writing of its intention to include Registrable
Shares in the Piggyback Registration Statement or Underwritten Offering, as applicable, and, in
such notice, shall inform the Company of the number of Registrable Shares Holding wishes to include
in such Piggyback Registration Statement or Underwritten Offering, as applicable, and provide, as a
condition to such inclusion, such information regarding itself and its Registrable Shares as is
required pursuant to Regulation S-K promulgated under the Securities Act to effect the registration
of the Registrable Shares; provided, however, if EnCap does not have an Affiliate who is an
officer or director of the Company, Holding shall provide such notice within three (3) Business
Days (or one (1) Business Day in the case of an “overnight” offering or “bought deal”) after
delivery of the above-described notice by the Company. If such written notification of Holding’s
intent to include shares in such Piggyback Registration Statement or Underwritten Offering, as
applicable, is not received by the Company within the time-frame specified in the immediately
preceding sentence, Holding shall have no right to include Registrable Shares in such Piggyback
Registration Statement or Underwritten Offering, as applicable. Inclusion of any Registrable
Shares in such Piggyback Registration Statement will not affect the inclusion of such Registrable
Shares in the Mandatory Shelf Registration Statement until such Registrable Shares have been sold
under the Piggyback Registration Statement, at which time the Company may remove from the Mandatory
Shelf Registration Statement such Registrable Shares.

               (A) Right to Terminate Piggyback Registration. At any time, the Company may terminate
or withdraw any Piggyback Registration Statement referred to in this Section 2(b)(i), and
without any obligation to Holding whether or not Holding has elected to include Registrable Shares
in such registration. The Company may suspend the effectiveness and use of any Piggyback
Registration Statement at any time for an unlimited amount of time whether or not Holding has
elected to include Registrable Shares in such registration.

               (B) Underwriting. Any notice provided to Holding by the Company pursuant to
Section 2(b)(i) in connection with an Underwritten Offering shall advise Holding of the
managing underwriters for any Underwritten Offering proposed under the Piggyback Registration
Statement. The right of Holding’s Registrable Shares to be included in any Piggyback Registration
Statement pursuant to this Section 2(b)(i) shall be conditioned upon participation in such
Underwritten Offering and the inclusion of Holding’s Registrable Shares in the Underwritten
Offering to the extent provided herein. Holding, if distributing Registrable Shares through such
Underwritten Offering shall enter into an underwriting agreement in customary form with the
managing underwriters selected for such underwriting and complete and execute any questionnaires,
powers of attorney, indemnities, securities escrow agreements and other documents reasonably
required under the terms of such underwriting, and furnish to the Company such information in writing as the Company may reasonably request for inclusion

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in the Registration Statement; provided, however, that Holding shall not be required to make
any representations or warranties to or agreements with the Company or the underwriters other than
representations, warranties or agreements as are customary and reasonably requested by the
underwriters. Notwithstanding any other provision of this Agreement, if the managing underwriters
determine in good faith that marketing factors require a limitation on the number of shares to be
included, then the managing underwriters may exclude shares (including Registrable Shares) from the
Piggyback Registration Statement and the Underwritten Offering, and any Shares included in the
Piggyback Registration Statement and the Underwritten Offering shall be allocated, first,
to the Company, and second, to Holding, and third, to any other Person included in
such Piggyback Registration Statement. If Holding disapproves of the terms of any Underwritten
Offering, Holding may elect to withdraw therefrom by written notice to the Company and the
underwriter, delivered at least 10 Business Days before the effective date of the Piggyback
Registration Statement. Any Registrable Shares excluded or withdrawn from such Underwritten
Offering shall be excluded and withdrawn from the Piggyback Registration Statement.

               (C) Hold-Back Agreement. By electing to include Registrable Shares in an Underwritten
Offering pursuant to a Piggyback Registration Statement, Holding shall be deemed to have agreed not
to effect any sale or distribution of securities of the Company of the same or similar class or
classes of the securities included in the Registration Statement or any securities convertible into
or exchangeable or exercisable for such securities, including a sale pursuant to Rule 144 under the
Securities Act, during such periods as reasonably requested (but in no event longer than 30 days
before or 60 days following the pricing of such Underwritten Offering, provided each of the
executive officers and directors of the Company who holds shares of Common Stock of the Company or
securities convertible into or exchangeable or exercisable for shares of Common Stock of the
Company is subject to the same restriction for the entire time period required of Holding
hereunder) by the representatives of the underwriters.

               (D) Termination of Piggyback Registration Rights. The Piggyback Registration rights
granted pursuant to this Section 2(b) shall terminate on the third anniversary of the
Lock-up Expiration Date.

               (E) Mandatory Shelf Registration not Impacted by Piggyback Registration Statement.
The Company’s obligation to file any Mandatory Shelf Registration Statement shall not be affected
by the filing or effectiveness of the Piggyback Registration Statement.

     (c) Expenses. The Company shall pay all Registration Expenses in connection with the
registration of the Registrable Shares pursuant to this Agreement. Holding, if participating in a
registration pursuant to this Section 2, shall bear all discounts and commissions payable
to underwriters or brokers and all transfer taxes in connection with a registration of Holding’s
Registrable Shares pursuant to this Agreement and any other expense of Holding not specifically
allocated to the Company pursuant to this Agreement relating to the sale or disposition of
Holding’s Registrable Shares pursuant to any Registration Statement. Nothing herein shall
require the Company to pay any expenses, fees, or costs relating to counsel for Holding unless
required pursuant to Section 5(c).

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     (d) No Additional Demand Registration Rights. Unless otherwise consented to by
Holding, which consent shall be unreasonably withheld, the Company shall not grant to any other
Person a demand registration right to register Common Stock for sale to the public in an
Underwritten Offering or a continuous offering under Rule 415 of the Securities Act.

3. Registration Procedures. In connection with the obligations of the Company with respect
to any registration pursuant to this Agreement, the Company shall:

     (a) prepare and file with the Commission, as specified in this Agreement, each Registration
Statement, which Registration Statement shall comply as to form in all material respects with the
requirements of the applicable form and include all financial statements required by the Commission
to be filed therewith, and use its commercially reasonable efforts to cause such Registration
Statement to become effective as soon as practicable after filing and to remain effective as
appropriate;

     (b) subject to Section 3(i), (i) prepare and file with the Commission such amendments
and post-effective amendments to each such Registration Statement as may be necessary to keep such
Registration Statement effective and accurate as appropriate, (ii) cause each Prospectus contained
therein to be supplemented by any required Prospectus supplement, and as so supplemented to be
filed pursuant to Rule 424 or any similar rule that may be adopted under the Securities Act, (iii)
promptly amend or supplement each such Registration Statement to include the Company’s quarterly
and annual financial information and other material developments (until the Company is eligible to
incorporate such information by reference into the Registration Statement), during which time sales
of the Registrable Shares under the Registration Statement will be suspended until such amendment
or supplement is filed and effective, and (iv) comply in all material respects with the provisions
of the Securities Act with respect to the disposition of all securities covered by each
Registration Statement during the applicable period in accordance with the intended method or
methods of distribution by Holding;

     (c) furnish to Holding, without charge, as many copies of each Prospectus, including each
preliminary Prospectus, any Permitted Issuer Free Writing Prospectus, and any amendment or
supplement thereto and such other documents as Holding may reasonably request, in order to
facilitate the public sale or other disposition of the Registrable Shares; the Company hereby
consents to the use of such Prospectus, including each preliminary Prospectus, and any Permitted
Issuer Free Writing Prospectus by Holding in connection with the offering and sale of the
Registrable Shares covered by any such Prospectus;

     (d) use its commercially reasonable efforts to register or qualify, or obtain exemption from
registration or qualification for, all Registrable Shares by the time the applicable Registration
Statement is declared effective by the Commission under all applicable state securities or “blue
sky” laws of such domestic jurisdictions as Holding shall reasonably request in writing, keep each
such registration or qualification or exemption effective during the period such Registration
Statement is required to be kept effective pursuant to this Agreement and do any and all other acts
and things that may be reasonably necessary or advisable to enable Holding to consummate the
disposition in each such jurisdiction of such Registrable Shares owned by Holding; provided,
however, that the Company shall not be required to
(i) qualify generally to do business in any jurisdiction or to register as a broker or dealer in such
jurisdiction where it would not otherwise be required to qualify but for this Section 3(d),
(ii) subject itself to

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taxation in any such jurisdiction, or (iii) submit to the general service of process in any such jurisdiction;

     (e) use its commercially reasonable efforts to cause all Registrable Shares covered by such
Registration Statement to be registered and approved by such other domestic governmental agencies
or authorities, if any, as may be necessary to enable Holding to consummate the disposition of such
Registrable Shares;

     (f) notify Holding promptly (i) when such Registration Statement has become effective and when
any post-effective amendments and supplements thereto become effective, (ii) of the issuance by the
Commission or any state securities authority of any stop order suspending the effectiveness of such
Registration Statement or the initiation of any proceedings for that purpose, (iii) of any request
by the Commission or any other federal or state governmental authority for amendments or
supplements to such Registration Statement or related Prospectus or any Issuer Free Writing
Prospectus or for additional information, and (iv) of the happening of any event during the period
such Registration Statement is effective as a result of which such Registration Statement or the
related Prospectus or any Permitted Issuer Free Writing Prospectus or any document incorporated by
reference therein contains any untrue statement of a material fact or omits to state any material
fact required to be stated therein or necessary to make the statements therein not misleading
(which information shall be accompanied by an instruction to suspend the use of the Registration
Statement and the Prospectus and such Permitted Issuer Free Writing Prospectus until the requisite
changes have been made);

     (g) use its commercially reasonable efforts to avoid the issuance of, or if issued, to obtain
the withdrawal of, any order enjoining or suspending the use or effectiveness of a Registration
Statement or suspending the qualification (or exemption from qualification) of any of the
Registrable Shares for sale in any jurisdiction, as promptly as practicable;

     (h) upon written request, furnish to Holding, without charge, at least one conformed copy of
such Registration Statement and any post-effective amendment or supplement thereto (without
documents incorporated therein by reference or exhibits thereto, unless requested);

     (i) except as provided in Section 4, upon the occurrence of any event contemplated by
Section 3(f)(iv), use its commercially reasonable efforts to promptly prepare a supplement
or post-effective amendment to a Registration Statement or the related Prospectus or any Permitted
Issuer Free Writing Prospectus or any document incorporated therein by reference or file any other
required document so that, as thereafter delivered to the purchasers of the Registrable Shares,
such Prospectus or Permitted Issuer Free Writing Prospectus will not contain any untrue statement
of a material fact or omit to state a material fact required to be stated therein or necessary to
make the statements therein, in the light of the circumstances under which they were made, not
misleading, and, upon request, promptly furnish to Holding a reasonable number of copies of each
such supplement or post-effective amendment;

     (j) if requested by the representative of the underwriters, if any, or Holding, (i) promptly
incorporate in a Prospectus supplement or post-effective amendment such material information as the
representative of the underwriters, if any, or Holding indicate relates to them or otherwise
reasonably request be included therein and (ii) make all required filings of such Prospectus
supplement or such post-effective amendment as soon as practicable after the Company has received notification of the matters to be incorporated in such Prospectus supplement
or post-effective amendment;

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     (k) in the case of an Underwritten Offering, use its commercially reasonable efforts to
furnish or caused to be furnished to Holding and the underwriters a signed counterpart, addressed
to Holding and the underwriters, of: (i) an opinion of counsel for the Company, dated the date of
each closing under the underwriting agreement, reasonably satisfactory to the underwriters; (ii) a
“comfort” letter, dated the date of the Underwriting Agreement and the date of each closing under
the underwriting agreement, signed by the independent public accountants who have certified the
Company’s financial statements included in such Registration Statement, covering substantially the
same matters with respect to such Registration Statement (and the Prospectus included therein) and
with respect to events subsequent to the date of such financial statements, as are customarily
covered in accountants’ letters delivered to underwriters in underwritten public offerings of
securities, and such other financial matters as the underwriters may reasonably request and
customarily obtained by underwriters in underwritten offerings, provided that, to be an addressee
of the comfort letter, Holding may be required to confirm that it is in the category of persons to
whom a comfort letter may be delivered in accordance with applicable accounting literature; and
(iii) a “comfort” letter, dated the date of the Underwriting Agreement and the date of each closing
under the underwriting agreement, signed by the independent petroleum engineering consultants who
have evaluated the Company’s oil and gas reserves included in such Registration Statement, covering
substantially the same matters with respect to such Registration Statement (and the Prospectus
included therein) and with respect to events subsequent to the date of its evaluation of such oil
and gas reserves, as are customarily covered in engineers’ letters delivered to underwriters in
underwritten public offerings of securities, and such other related matters as the underwriters may
reasonably request and customarily obtained by underwriters in underwritten offerings;

     (l) enter into customary agreements (including in the case of an Underwritten Offering, an
underwriting agreement in customary form) and take all other action in connection therewith to
expedite or facilitate the distribution of the Registrable Shares included in such Registration
Statement and, in the case of an Underwritten Offering, make representations and warranties to the
underwriters in such form and scope as are customarily made by issuers to underwriters in
underwritten offerings and confirm the same to the extent customary if and when requested;

     (m) in connection with an Underwritten Offering, use its commercially reasonable efforts to
make available for inspection by the representative of any underwriters participating in any
disposition pursuant to a Registration Statement, all financial and other records, pertinent
corporate documents and properties of the Company and cause the respective officers, directors and
employees of the Company to supply all information reasonably requested by any such
representatives, the representative of the underwriters, counsel thereto or accountants in
connection with a Registration Statement; provided, however, that such records, documents
or information that the Company determines, in good faith, to be confidential and notifies such
representatives, representative of the underwriters, counsel thereto or accountants are
confidential shall not be disclosed by the representatives, representative of the underwriters,
counsel thereto or accountants unless (i) the disclosure of such records, documents or information
is necessary to avoid or correct a misstatement or omission in a Registration Statement or
Prospectus, (ii) the release of such records, documents or information is ordered
pursuant to a subpoena or other order from a court of competent jurisdiction, or (iii) such
records, documents or information have been generally made available to the public; provided
further, that to the extent practicable, the foregoing inspection and information gathering
shall be

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coordinated on behalf of Holding and the other parties entitled thereto by one counsel
designated by and on behalf of Holding and the other parties, which counsel the Company determines
in good faith is reasonably acceptable;

     (n) use its commercially reasonable efforts (including seeking to cure in the Company’s
listing or inclusion application any deficiencies cited by the exchange or market) to list or
include all Registrable Shares on the New York Stock Exchange and thereafter maintain the listing
on such exchange or market when such Registrable Shares are included in a Registration Statement;

     (o) use its commercially reasonable efforts to prepare and file in a timely manner all
documents and reports required by the Exchange Act and, to the extent the Company’s obligation to
file such reports pursuant to Section 15(d) of the Exchange Act expires before the expiration of
the effectiveness period of the Registration Statement as required by Section 2(a)(i), the
Company shall register the Registrable Shares under the Exchange Act and shall maintain such
registration through the effectiveness period required by Section 2(a)(i);

     (p) provide a CUSIP number for all Registrable Shares not later than the effective date of the
Registration Statement;

     (q) (i) otherwise use its commercially reasonable efforts to comply in all material respects
with all applicable rules and regulations of the Commission, (ii) make generally available to its
stockholders, as soon as reasonably practicable, earnings statements covering at least 12 months
that satisfy the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder, and
(iii) delay filing any Registration Statement or Prospectus or amendment or supplement to such
Registration Statement or Prospectus to which Holding shall have reasonably objected on the grounds
that such Registration Statement or Prospectus or amendment or supplement does not comply in all
material respects with the requirements of the Securities Act, Holding having been furnished with a
copy thereof at least three Business Days before the filing thereof, provided that the Company may
file such Registration Statement or Prospectus or amendment or supplement following such time as
the Company shall have made a good faith effort to resolve any such issue with Holding and shall
have advised Holding in writing of its reasonable belief that such filing complies in all material
respects with the requirements of the Securities Act;

     (r) cause to be maintained a registrar and transfer agent for all Registrable Shares covered
by any Registration Statement from and after a date not later than the effective date of such
Registration Statement;

     (s) in connection with any sale or transfer of the Registrable Shares (whether or not pursuant
to a Registration Statement) that will result in the securities being delivered no longer
constituting Registrable Shares, cooperate with Holding and the representative of the underwriters,
if any, to facilitate the timely preparation and delivery of certificates representing the
Registrable Shares to be sold, which certificates shall not bear any transfer restrictive legends
(other than as required by the Company’s charter), and to enable such Registrable Shares to be in
such denominations and registered in such names as the representative of the underwriters, if
any, or Holding may request at least three Business Days before any sale of the Registrable Shares;

11

 

     (t) if required under the rules of FINRA, in connection with the initial filing of a Shelf
Registration Statement and each amendment thereto with the Commission pursuant to Section
2(a), cooperate with underwriter’s or other FINRA member’s counsel as reasonably necessary to
prepare and, within one Business Day of such filing with the Commission, to file with FINRA all
forms and information required or requested by FINRA in order to obtain written confirmation from
FINRA that FINRA does not object to the fairness and reasonableness of the underwriting terms and
arrangements (or any deemed underwriting terms and arrangements) (each such written confirmation, a
“No Objections Letter”) relating to the resale of Registrable Shares pursuant to the Shelf
Registration Statement, including, without limitation, information provided to FINRA through its
COBRADesk system, and shall pay all costs, fees and expenses incident to FINRA’s review of the
Shelf Registration Statement and the related underwriting terms and arrangements, including,
without limitation, all filing fees associated with any filings or submissions to FINRA and the
legal expenses, filing fees and other disbursements of any other FINRA member that is the holder
of, or is affiliated or associated with an owner of, Registrable Shares included in the Shelf
Registration Statement (including in connection with any initial or subsequent member filing); and

     (u) upon effectiveness of the first Registration Statement filed under this Agreement, if
necessary, the Company will take such actions and make such filings as are necessary to effect the
registration of the Common Stock under the Exchange Act simultaneously with or immediately
following the effectiveness of the Registration Statement.

     The Company may require Holding to furnish to the Company such information regarding the
proposed distribution by Holding as the Company may from time to time reasonably request in writing
or as shall be required to effect the registration of the Registrable Shares, and Holding shall not
be entitled to be named as a selling stockholder in any Registration Statement and Holding shall be
entitled to use the Prospectus forming a part thereof if Holding does not provide such information
to the Company. Holding further agrees to furnish promptly to the Company in writing all
information required from time to time to make the information previously furnished by Holding not
misleading.

     Holding agrees that, upon receipt of any notice from the Company of the happening of any event
of the kind described in Section 3(f)(ii), 3(f)(iii) or 3(f)(iv), Holding
will immediately discontinue disposition of Registrable Shares pursuant to a Registration Statement
until (i) any such stop order is vacated or (ii) if an event described in Section 3(f)(iii)
or 3(f)(iv) occurs, Holding’s receipt of the copies of the supplemented or amended
Prospectus. If so directed by the Company, Holding will deliver to the Company (at the reasonable
expense of the Company) all copies in its possession, other than permanent file copies then in
Holding’s possession, of the Prospectus covering such Registrable Shares current at the time of
receipt of such notice.

     Holding represents that it has not prepared or had prepared on its behalf or used or referred
to, and agrees that it will not prepare or have prepared on its behalf or use or refer to, any Free
Writing Prospectus, and has not distributed and will not distribute any written materials in
connection with the offer or sale of the Registrable Shares without the prior express written
consent of the Company and, in connection with any Underwritten Offering, the underwriters. Any
such Free Writing Prospectus consented to by the Company and the underwriters, as the
case may be, is hereinafter referred to as a “Permitted Free Writing Prospectus.” The Company
represents and agrees that it has treated and will treat, as the case may be, each Permitted Free

12

 

Writing Prospectus as an Issuer Free Writing Prospectus, including in respect of timely filing with
the Commission, legending and record keeping.

4. Suspension Period.

     (a) Subject to the provisions of this Section 4, following the effectiveness of a
Registration Statement (and the filings with any international, federal or state securities
commissions), the Company may direct Holding, in accordance with Section 4(b), to suspend
sales of the Registrable Shares pursuant to a Registration Statement for such times as the Company
reasonably may determine is necessary and advisable (but in no event, (A) in the case of clause (i)
below, for more than 45 consecutive days and (B) in the case of clauses (i), (ii) and (iii) below,
for more than an aggregate of 90 days in any consecutive 12-month period commencing on the Closing
Time or more than 60 days in any consecutive 90-day period, except (in the case of clause (B)) as a
result of a review of any post-effective amendment by the Commission before declaring any
post-effective amendment to the Registration Statement effective, provided that the Company
has used its commercially reasonable efforts to cause such post-effective amendment to be declared
effective), if any of the following events shall occur: (i) the representative of the underwriters
of an Underwritten Offering of primary shares by the Company has advised the Company that the sale
of Registrable Shares pursuant to the Registration Statement would have a material adverse effect
on the price, timing, marketing or distribution of such Underwritten Offering; (ii) the majority of
the members of the Board of Directors of the Company shall have determined in good faith that
(1) the offer or sale of any Registrable Shares would materially impede, delay or interfere with
any proposed financing, offer or sale of securities, acquisition, merger, tender offer, business
combination, corporate reorganization, consolidation or other significant transaction involving the
Company, (2) upon the advice of counsel, the sale of Registrable Shares pursuant to the
Registration Statement would require disclosure of non-public material information not otherwise
required to be disclosed under applicable law, and (3) either (x) the Company has a bona fide
business purpose for preserving the confidentiality of such transaction, (y) disclosure would have
a material adverse effect on the Company or the Company’s ability to consummate such transaction,
or (z) the proposed transaction renders the Company unable to comply with Commission requirements,
in each case under circumstances that would make it impractical or inadvisable to cause the
Registration Statement (or such filings) to become effective or to promptly amend or supplement the
Registration Statement on a post-effective basis, as applicable; or (iii) the majority of the
members of the Board of Directors of the Company shall have determined in good faith, upon the
advice of counsel, that it is required by law, rule or regulation to supplement the Registration
Statement or file a post-effective amendment to the Registration Statement in order to incorporate
information into the Registration Statement for the purpose of (1) including in the Registration
Statement any prospectus required under Section 10(a)(3) of the Securities Act; (2) reflecting in
the prospectus included in the Registration Statement any facts or events arising after the
effective date of the Registration Statement (or of the most-recent post-effective amendment) that,
individually or in the aggregate, represents a fundamental change in the information set forth
therein; or (3) including in the prospectus included in the Registration Statement any material
information with respect to the plan of distribution not disclosed in the Registration Statement or
any material change to such information. Upon the occurrence of any such suspension, the Company
shall use its commercially reasonable efforts to cause the Registration Statement to become
effective or to promptly amend or supplement the Registration Statement on a post-effective basis or to take such action as is
necessary

13

 

to make resumed use of the Registration Statement compatible with the Company’s best
interests, as applicable, so as to permit Holding to resume sales of the Registrable Shares as soon
as possible.

     (b) In the case of an event that causes the Company to suspend the use of a Registration
Statement (a “Suspension Event”), the Company shall give written notice (a “Suspension Notice”) to
Holding to suspend sales of the Registrable Shares and such notice shall state generally the basis
for the notice and that such suspension shall continue only for so long as the Suspension Event or
its effect is continuing and the Company is using its best efforts and taking all reasonable steps
to terminate suspension of the use of the Registration Statement as promptly as possible. Holding
shall not effect any sales of the Registrable Shares pursuant to such Registration Statement (or
such filings) at any time after it has received a Suspension Notice from the Company and before
receipt of an End of Suspension Notice (as defined below). If so directed by the Company, Holding
will deliver to the Company (at the expense of the Company) all copies other than permanent file
copies then in Holding’s possession of the Prospectus and any Issuer Free Writing Prospectus
covering the Registrable Shares at the time of receipt of the Suspension Notice. Holding may
recommence effecting sales of the Registrable Shares pursuant to the Registration Statement (or
such filings) following further notice to such effect (an “End of Suspension Notice”) from the
Company, which End of Suspension Notice shall be given by the Company to Holding in the manner
described above promptly following the conclusion of any Suspension Event and its effect.

     (c) Notwithstanding any provision herein to the contrary, subject to any Suspension Events or
as contemplated by Section 3(f)(iv), each Registration Statement shall be maintained
effective pursuant to this Agreement until the Registrable Shares are not Registrable Shares.

5. Indemnification and Contribution.

     (a) The Company agrees to indemnify and hold harmless (i) Holding and any underwriter (as
determined in the Securities Act) for Holding, (ii) each Person, if any, who controls (within the
meaning of Section 15 of the Securities Act or Section 20(a) of the Exchange Act) any of the
foregoing (a “Controlling Person”), and (iii) the respective officers, directors, partners,
members, employees, representatives and agents of any such Person or any Controlling Person (any
Person referred to in clause (i), (ii) or (iii) may hereinafter be referred to as an “Purchaser
Indemnitee”) from and against any and all losses, claims, damages, judgments, actions, reasonable
out-of-pocket expenses, and other liabilities, including, as incurred, reimbursement of all
reasonable costs of investigating, preparing, pursuing or defending any claim or action, or any
investigation or proceeding by any governmental agency or body, commenced or threatened, including
the reasonable fees and expenses of outside counsel to any Purchaser Indemnitee, joint or several
(the “Liabilities”), directly or indirectly related to, based upon, arising out of or in connection
with any untrue statement or alleged untrue statement of a material fact contained in any
Registration Statement, Prospectus or Issuer Free Writing Prospectus (as amended or supplemented),
or any preliminary Prospectus or any other document prepared by the Company used to sell the
Registrable Shares, or any omission or alleged omission to state therein a material fact required
to be stated therein or necessary to make the statements therein (in the case of a Prospectus, in
light of the circumstances under which they were made), not misleading, except insofar as such
Liabilities arise out of or are based upon (i) any untrue statement or omission or alleged untrue statement or omission made in reliance upon

14

 

and in conformity with information relating to any Purchaser Indemnitee furnished to the Company or
any underwriter in writing by such Purchaser Indemnitee expressly for use therein, (ii) any untrue
statement contained in or omitted from a preliminary Prospectus if such untrue statement is cured
by delivery to Holding of an amended preliminary Prospectus or a Free Writing Prospectus prior to
pricing of the sale of securities, if an Underwritten Offering, or the effectiveness of the
Mandatory Shelf Registration Statement to which the preliminary Prospectus relates, or (iii) any
sales by Holding after the delivery by the Company to Holding of a Suspension Notice and before the
delivery by the Company of an End of Suspension Notice. The Company shall notify Holding promptly
of the institution, threat or assertion of any claim, proceeding (including any governmental
investigation), or litigation which it shall have become aware in connection with the matters
addressed by this Agreement which involves the Company or a Purchaser Indemnitee. The indemnity
provided for herein shall remain in full force and effect regardless of any investigation made by
or on behalf of any Purchaser Indemnitee.

     (b) In connection with any Registration Statement in which Holding is participating, Holding
agrees to indemnify and hold harmless the Company, each Person who controls the Company within the
meaning of Section 15 of the Securities Act or Section 20(a) of the Exchange Act, and the
respective officers, directors, partners, members, representatives, employees and agents of such
Person or Controlling Person to the same extent as the foregoing indemnity from the Company to each
Purchaser Indemnitee, but only with reference to (i) untrue statements or omissions or alleged
untrue statements or omissions made in reliance upon and in strict conformity with information
relating to Holding furnished to the Company in writing by Holding expressly for use in any
Registration Statement or Prospectus, any amendment or supplement thereto, or any preliminary
Prospectus and (ii) any sales by Holding after the delivery by the Company to Holding of a
Suspension Notice and before the delivery by the Company of an End of Suspension Notice. The
liability of Holding pursuant to clause (i) of the immediately preceding sentence shall in no event
exceed the net proceeds received by Holding from sales of Registrable Shares giving rise to such
obligations. If Holding elects to include Registrable Shares in an Underwritten Offering, Holding
shall be required to agree to such customary indemnification provisions as may reasonably be
required by the underwriter in connection with such Underwritten Offering.

     (c) If any suit, action, proceeding (including any governmental or regulatory investigation),
claim or demand shall be brought or asserted against any Person in respect of which indemnity may
be sought pursuant to Section 5(a) or 5(b), such Person (the “Indemnified Party”),
shall promptly notify the Person against whom such indemnity may be sought (the “Indemnifying
Party”), in writing (to the extent legally advisable) of the commencement thereof (but the failure
to so notify an Indemnifying Party shall not relieve it from any Liability which it may have under
this Section 5, except to the extent the Indemnifying Party is materially prejudiced by the
failure to give notice), and the Indemnifying Party, upon request of the Indemnified Party, shall
retain counsel reasonably satisfactory to the Indemnified Party to represent the Indemnified Party
and any others the Indemnifying Party may reasonably designate in such proceeding and shall assume
the defense of such proceeding and pay the fees and expenses actually incurred by such counsel
related to such proceeding. Notwithstanding the foregoing, in any such proceeding, any Indemnified
Party may retain its own counsel, but the fees and expenses of such counsel shall be at the expense
of such Indemnified Party, unless (i) the Indemnifying Party and the Indemnified Party shall have mutually agreed in writing to the

15

 

contrary, (ii) the Indemnifying Party failed within a reasonable time after notice of commencement
of the action to assume the defense and employ counsel reasonably satisfactory to the Indemnified
Party, (iii) the Indemnifying Party and its counsel do not pursue in a reasonable manner the
defense of such action or (iv) the named parties to any such action (including any impleaded
parties) include both such Indemnified Party and the Indemnifying Party, or any Affiliate of the
Indemnifying Party, and such Indemnified Party shall have been reasonably advised by counsel that,
either (x) there may be one or more legal defenses available to it which are different from or
additional to those available to the Indemnifying Party or such Affiliate of the Indemnifying Party
or (y) a conflict may exist between such Indemnified Party and the Indemnifying Party or such
Affiliate of the Indemnifying Party, in which event the Indemnifying Party may not assume or direct
the defense of such action on behalf of such Indemnified Party, it being understood, however, that
the Indemnifying Party shall not, in connection with any one such action or separate but
substantially similar or related actions arising out of the same general allegations or
circumstances, be liable for the fees and expenses of more than one separate firm of attorneys (in
addition to any local counsel) for all such Indemnified Parties, which firm shall be designated in
writing by those Indemnified Parties who sold a majority of the Registrable Shares sold by all such
Indemnified Parties under the particular Registration Statement and any such separate firm for the
Company, the directors, the officers and such control Persons of the Company as shall be designated
in writing by the Company. The Indemnifying Party shall not be liable for any settlement of any
proceeding effected without its written consent, which consent shall not be unreasonably withheld
or delayed, but if settled with such consent or if there be a final judgment for the plaintiff, the
Indemnifying Party agrees to indemnify any Indemnified Party from and against any Liability by
reason of such settlement or judgment to the extent provided in this Section 5 without
reference to this sentence. No Indemnifying Party shall, without the prior written consent of the
Indemnified Party, effect any settlement of any pending or threatened proceeding in respect of
which any Indemnified Party is or could have been a party and indemnity could have been sought
hereunder by such Indemnified Party, unless such settlement includes an unconditional release of
such Indemnified Party from all Liability on claims that are the subject matter of such proceeding.

     (d) If the indemnification provided for in Section 5(a) or 5(b) is for any
reason held to be unavailable to an Indemnified Party in respect of any Liabilities referred to
therein (other than by reason of the exceptions provided therein) or is insufficient to hold
harmless a party indemnified thereunder, then each Indemnifying Party under such sections, in lieu
of indemnifying such Indemnified Party thereunder, shall contribute to the amount paid or payable
by such Indemnified Party as a result of such Liabilities (i) in such proportion as is appropriate
to reflect the relative benefits of the Indemnified Party on the one hand and the Indemnifying
Parties on the other in connection with the statements or omissions that resulted in such
Liabilities, or (ii) if the allocation provided by clause (i) above is not permitted by applicable
law, in such proportion as is appropriate to reflect not only the relative benefits referred to in
clause (i) above but also the relative fault of the Indemnifying Parties and the Indemnified Party,
as well as any other relevant equitable considerations. The relative fault of the Company, on the
one hand, and any Purchaser Indemnitees, on the other, shall be determined by reference to, among
other things, whether the untrue or alleged untrue statement of a material fact or the omission or
alleged omission to state a material fact relates to information supplied by the Company or by such Purchaser Indemnitees and the parties’ relative intent, knowledge, access
to information and opportunity to correct or prevent such statement or omission.

16

 

     (e) The parties agree that it would not be just and equitable if contribution pursuant to this
Section 5 were determined by pro rata allocation (even if such Indemnified Parties
were treated as one entity for such purpose), or by any other method of allocation that does not
take account of the equitable considerations referred to in Section 5(d). The amount paid
or payable by an Indemnified Party as a result of any Liabilities referred to in Section
5(d) shall be deemed to include, subject to the limitations set forth above, any reasonable
legal or other expenses actually incurred by such Indemnified Party in connection with
investigating or defending any such action or claim. Notwithstanding the provisions of this
Section 5, in no event shall a Purchaser Indemnitee be required to contribute any amount in
excess of the amount by which proceeds received by such Purchaser Indemnitee from sales of
Registrable Shares exceeds the amount of any damages that such Purchaser Indemnitee has otherwise
been required to pay by reason of such untrue or alleged untrue statement or omission or alleged
omission. For purposes of this Section 5, each Person, if any, who controls (within the
meaning of Section 15 of the Securities Act or Section 20(a) of the Exchange Act) Holding shall
have the same rights to contribution as Holding, as the case may be, and each Person, if any, who
controls (within the meaning of Section 15 of the Securities Act or Section 20(a) of the Exchange
Act) the Company, and each officer, director, partner, member, employee, representative, agent or
manager of the Company shall have the same rights to contribution as the Company. Any party
entitled to contribution will, promptly after receipt of notice of commencement of any action, suit
or proceeding against such party in respect of which a claim for contribution may be made against
another party or parties, notify each party or parties from whom contribution may be sought, but
the omission to so notify such party or parties shall not relieve the party or parties from whom
contribution may be sought from any obligation it or they may have under this Section 5 or
otherwise, except to the extent that any party is materially prejudiced by the failure to give
notice. No Person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of
the Securities Act), shall be entitled to contribution from any Person who was not guilty of such
fraudulent misrepresentation.

     (f) The indemnity and contribution agreements contained in this Section 5 will be in
addition to any Liability which any Indemnifying Party may otherwise have to any Indemnified Party
referred to above. Each Purchaser Indemnitee’s obligations to contribute pursuant to this
Section 5 are not joint but are several in the proportion that the number of Shares sold by
such Purchaser Indemnitee bears to the number of Shares sold by all Purchaser Indemnities.

6. Termination of the Company’s Obligations. The Company shall have no further obligations
pursuant to this Agreement at such time as no Registrable Shares are outstanding after their
original issuance, provided, however, that the Company’s obligations under Sections
5 and 7 (and any related definitions) shall remain in full force and effect following
such time.

17

 

7. Miscellaneous.

     (a) Amendments and Waivers. This Agreement may not be amended, modified or
supplemented, and waivers or consents to or departures from the provisions hereof may not be given,
without the written consent of the Company and Holding; provided, however, that for
purposes of this Agreement, Registrable Shares owned, directly or indirectly, by an entity that is
an Affiliate of the Company due to the Company’s owning an interest in such entity shall not be
deemed to be outstanding.

     (b) Notices. All notices and other communications, provided for or permitted
hereunder shall be made by press release publicly disseminated or in writing and delivered by
electronic transmission, facsimile (with receipt confirmed), overnight courier or registered or
certified mail, return receipt requested, or by telegram, addressed as follows:

          (i) if to Holding, at the most current address given by the transfer agent and registrar of
the Shares to the Company (including by email); and

          (ii) if to the Company, at the offices of the Company at 1001 Fannin, Suite 202, Houston, TX
77002, Attn: Chief Executive Officer; with a copy to Vinson & Elkins LLP, 1001 Fannin, Suite 2500,
Houston, Texas 77022, Attention: David P. Oelman.

     (c) Successors and Assigns; Third Party Beneficiaries. This Agreement shall inure to
the benefit of and be binding upon the successors and assigns of each of the parties hereto and
shall inure to the benefit of Holding. The registration rights granted by this Agreement may not
be transferred or assigned by operation of law or in connection with any transfer or assignment
Registrable Securities to a transferee unless, immediately following such transfer or assignment,
such transferee will hold an amount of Registrable Shares greater than 10% of the Common Stock
outstanding on the date of such transfer or assignment, and then only upon notification to the
Company in writing and agreement by such transferee to the rights and obligations of this
Agreement. References to Holding in this Agreement shall be deemed to include any such transferee
or assignee permitted by this Section 7(c).

     (d) Counterparts. This Agreement may be executed in any number of counterparts and by
the parties hereto in separate counterparts, each of which when so executed shall be deemed to be
an original and all of which taken together shall constitute one and the same agreement.

     (e) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE
WITH THE LAWS OF THE STATE OF DELAWARE, AS APPLIED TO CONTRACTS MADE AND PERFORMED WITHIN THE STATE
OF DELAWARE, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW.

     (f) Severability. If any term, provision, covenant or restriction of this Agreement
is held by a court of competent jurisdiction to be invalid, illegal, void or unenforceable, the
remainder of the terms, provisions, covenants and restrictions set forth herein shall remain in
full force and effect and shall in no way be affected, impaired or invalidated, and the parties
hereto shall use their commercially reasonable efforts to find and employ an alternative means to
achieve the same or substantially the same result as that contemplated by such term, provision,

18

 

covenant or restriction. It is hereby stipulated and declared to be the intention of the parties
hereto that they would have executed the remaining terms, provisions, covenants and restrictions
without including any of such that may be hereafter declared invalid, illegal, void or
unenforceable.

     (g) Entire Agreement. This Agreement is intended by the parties hereto as a final
expression of their agreement, and is intended to be a complete and exclusive statement of the
agreement and understanding of the parties hereto in respect of the subject matter contained herein
and therein.

     (h) Survival. The indemnification and contribution obligations under Section
5 shall survive the termination of the Company’s obligations under Section 2.

     (i) Headings. The headings in this Agreement are for convenience of reference only
and shall not limit or otherwise affect the provisions of this Agreement. All references made in
this Agreement to “Section” refer to such Section of this Agreement, unless expressly stated
otherwise.

     (j) Adjustment for Stock Splits, etc. Wherever in this Agreement there is a reference
to a specific number of shares with respect to any securities, then upon the occurrence of any
subdivision, combination, or stock dividend of such shares, the specific number of shares with
respect to any securities so referenced in this Agreement shall automatically be proportionally
adjusted to reflect the effect on the outstanding shares of such class or series of stock by such
subdivision, combination, or stock dividend.

[Remainder of this Page Intentionally Left Blank]

19

 

Execution Version

     IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first above
written.

	 	 	 	 	 
	 	OASIS PETROLEUM INC.

 	 
	 	By:  	/s/ Thomas B. Nusz
 	 
	 	 	Name:  	Thomas B. Nusz 	 
	 	 	Title:  	President and Chief Executive Officer 	 
	 
	 	OAS HOLDING COMPANY LLC

 	 
	 	By:  	/s/ Thomas B. Nusz
 	 
	 	 	Name:  	Thomas B. Nusz 	 
	 	 	Title:  	President and Chief Executive Officerexv10w2

Exhibit 10.2

Execution Version

BUSINESS OPPORTUNITIES AGREEMENT

     THIS BUSINESS OPPORTUNITIES AGREEMENT (this “Agreement”), dated as of June 22, 2010, is
entered into by and among Oasis Petroleum Inc., a Delaware corporation (the “Company”), and the
parties to this Agreement listed on Exhibit A hereto (each a “Designated Party” and
collectively the “Designated Parties”).

RECITALS

     A. Each of the Designated Parties engages, directly or indirectly, in businesses similar to
the business of the Company.

     B. In recognition that certain Designated Parties may engage, directly or indirectly, in the
same or similar activities or lines of business and have an interest in the same or similar areas
of business, and in recognition of the benefits to be derived by the Company through its continued
contractual, corporate and business relations with each Designated Party (including services of
employees, officers and directors of each Designated Party as directors and officers of the
Company), this Agreement is set forth to regulate and define the conduct of certain affairs of the
Company as they may involve each Designated Party, and as applicable, its employees, officers and
directors, and the powers, rights, duties, liabilities, interests and expectations of the Company
in connection therewith.

     C. The law relating to duties that certain Designated Parties may owe to the Company is not
clear. The application of such law to particular circumstances is often difficult to predict, and,
if a court were to hold that any Designated Party breached any such duty, such Designated Party
could be held liable for damages in a legal action brought on behalf of the Company.

     D. To induce certain of the Designated Parties to continue to serve as directors of the
Company, the Company is willing to enter into this Agreement, pursuant to Section 122 of the
General Corporation Law of the State of Delaware, to renounce, effective upon the date hereof, any
interest or expectancy it may have in the classes or categories of business opportunities specified
herein that are presented to or identified by any Designated Party, as more fully described herein.
As a result of this Agreement, each Designated Party, as applicable, may continue to conduct his
or its business and to pursue certain business opportunities without an obligation to offer such
opportunities to the Company or any of its Subsidiaries, and any Designated Party, as applicable,
may continue to discharge his responsibilities as a director or employee of such Designated Party
or any company in which such Designated Party has an interest.

     NOW, THEREFORE, in consideration of the foregoing, the mutual covenants, rights, and
obligations set forth in this Agreement and the benefits to be derived herefrom, and other good and
valuable consideration, the receipt and the sufficiency of which each of the undersigned
acknowledges and confesses, the undersigned agree as follows:

     1. Renouncement of Business Opportunities. To the fullest extent permitted by
applicable law, the Company hereby renounces any interest or expectancy in, or in being offered any
opportunity to participate in, any business opportunity, transaction or other matter presented to
any Designated Party or in which any Designated Party participates or desires or seeks to

 

 

participate in (each, a “Business Opportunity”) other than a Business Opportunity that (i) is
first presented to a Designated Party solely in such person’s capacity as a director or officer of
the Company or its Subsidiaries and with respect to which, at the time of such presentment, no
other Designated Party has independently received notice of or otherwise identified such Business
Opportunity or (ii) is identified by a Designated Party solely through the disclosure of
information by or on behalf of the Company (each Business Opportunity other than those referred to
in clauses (i) or (ii) are referred to as a “Renounced Business Opportunity”). No Designated Party
shall have any obligation to communicate or offer any Renounced Business Opportunity to the
Company, and any Designated Party may pursue a Renounced Business Opportunity, provided that such
Renounced Business Opportunity is conducted by such Designated Party in accordance with the
standard set forth in Section 2. Notwithstanding the foregoing, each Designated Party who is a
director or officer of the Company or its Subsidiaries and who is offered a Business Opportunity in
his or her capacity as a director or officer of the Company or its Subsidiaries shall be obligated
to communicate such Business Opportunity to the Company. The Company shall not be prohibited from
pursuing any Renounced Business Opportunity. Nothing in this Section 1 shall be construed to allow
any director to usurp a Business Opportunity of the Company or its Subsidiaries solely for his or
her personal benefit.

     2. Standards for Separate Conduct of Renounced Business Opportunities. In the event
that a Designated Party acquires knowledge of a Renounced Business Opportunity, such Designated
Party may pursue such Renounced Business Opportunity if such Renounced Business Opportunity is
developed and pursued solely through the use of personnel and assets of the Designated Party
(including, as applicable, such Designated Party in his capacity as a director, officer, employee
or agent of the Designated Party) or jointly with the personnel and assets of any other Person or
Persons, provided that each such Person is not an Affiliate of the Company and does not owe any
fiduciary or other duty to the Company.

     3. Liability. Provided a Renounced Business Opportunity is conducted by a Designated
Party in accordance with the standards set forth in Section 2 hereof, no Designated Party shall be
liable to the Company or any of its stockholders or any of the Company’s Subsidiaries for breach of
any fiduciary or other duty, as a director or officer or controlling stockholder or otherwise, by
reason of such Renounced Business Opportunity. In addition, no Designated Party shall be liable to
the Company or any of its stockholders or any of the Company’s Subsidiaries for breach of any
fiduciary or other duty, as a director or officer or controlling stockholder or otherwise, by
reason of the fact that such Designated Party conducts, pursues or acquires such Renounced Business
Opportunity for itself, directs such Renounced Business Opportunity to another Person or does not
communicate information regarding such Renounced Business Opportunity to the Company.

2

 

     4. Disclosing Conflicts of Interest. Should any director of the Company have actual
knowledge that he or his Affiliates is pursuing a Renounced Business Opportunity also pursued by
the Company, he shall disclose to the Company’s board of directors that he may have a conflict of
interest, so that the board of directors may consider his withdrawal from discussions in board
deliberations, as appropriate.

     5. Interpretation.

     (a) For purposes of this Agreement, “Designated Parties” shall include all Subsidiaries and
Affiliates, including any investment fund managed by the Designated Party, of each Designated Party
(other than the Company and its Subsidiaries).

     (b) As used in this Agreement, the following definitions shall apply:

     (i) “Affiliate” means with respect to a specified person, a person that directly, or
indirectly through one or more intermediaries, controls, or is controlled by, or is under
common control with, the person specified, and any directors, officers, partners or 5% or
more owners of such person.

     (ii) “Person” means an individual, corporation, partnership, limited liability company,
trust, joint venture, unincorporated organization or other legal or business entity.

     (iii) “Subsidiary” or “Subsidiaries” shall mean, with respect to any Person, any other
Person the majority of the voting securities of which are owned, directly or indirectly, by
such first Person.

     6. Miscellaneous.

     (a) The provisions of this Agreement shall terminate and be of no further force and effect at
such time as no Designated Party serves as a director (including Chairman of the Board) or officer
of the Company or its Subsidiaries.

     (b) This Agreement does not prohibit or impact the Company’s ability to participate in any
Business Opportunity.

     (c) This Agreement may be signed by facsimile signature and in any number of counterparts,
each of which when so executed and delivered shall be deemed an original, and such counterparts
together shall constitute one instrument. This Agreement shall be governed by and construed in
accordance with the laws of the State of Delaware, without regard to conflicts of laws principles.

[SIGNATURE PAGE FOLLOWS]

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     IN WITNESS WHEREOF, the undersigned have duly executed this Agreement as of the date set forth
above.

	 	 	 	 	 
	 	OASIS PETROLEUM INC.

 	 
	 	By:  	/s/ Thomas B. Nusz
 	 
	 	 	Name:  	Thomas B. Nusz 	 
	 	 	Title:  	President and Chief Executive Officer 	 

	 	 	 	 	 
	 	DESIGNATED PARTIES:

 	 
	 	/s/ Robert L. Zorich
 	 
	 	Robert L. Zorich 	 
	 	 	 
	 	     /s/ Douglas E. Swanson, Jr.
 	 
	 	Douglas E. Swanson, Jr. 	 

	 	 	 	 	 

	 	 	ENCAP INVESTMENTS L.P.
	 
	 	 	 	 
	`

	 	By:
	 	EnCap Investments GP, L.L.C.,
	 

	 	 	 	General Partner of EnCap Investments L.P.

	 	 	 	 	 
	 	By:  	             /s/ D. Martin Phillips
 	 
	 	 	Name:  	D. Martin Phillips 	 
	 	 	Title:  	Senior Managing Director 	 

 

	 	 	 	 	 

EXHIBIT A

Designated Parties

Board Members

Douglas E. Swanson, Jr.

Robert L. Zorich

Controlling Stockholder

EnCap Investments L.P.

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