Exhibit 10.48

OMNIBUS AGREEMENT

This Omnibus Agreement (this "Agreement"), dated as of December 20, 2002, is by and among Brigham Exploration Company, a Delaware corporation (the "Company"),
Brigham Oil & Gas, L.P., a Delaware limited partnership (the "Borrower"), and the Credit Suisse First Boston entities listed on Schedule A hereto (the "CSFB Entities"). Unless otherwise defined
herein, all terms used herein shall have the meaning given such terms in the Credit Agreement (defined herein).

RECITALS

WHEREAS, the CSFB Entities and Shell Capital Inc., a Delaware corporation ("SCI") are parties to that certain Assignment Agreement, dated as of November 21, 2002
(the "Assignment Agreement"), pursuant to which the CSFB Entities purchased the Assigned Interest (as such term is defined in the Assignment Agreement) (the "Assignment") held by SCI pursuant to that
certain Amended and Restated Credit Agreement, dated as of February 17, 2000, among the Borrower, Agent, and each of the Lenders (as amended and supplemented, the "Credit Agreement");

WHEREAS,
the parties desire that the CSFB Entities immediately convert all outstanding Loans acquired by the CSFB Entities pursuant to the Assignment Agreement into 2,564,102 shares of
the Company's common stock, $0.01 par value (the "Shares"), in accordance with the Equity Conversion Agreement (the "Conversion");

WHEREAS,
the parties desire to waive certain actions required under the Credit Agreement or other Loan Documents in order to effect the Conversion in an expedient manner; and

WHEREAS,
the Company, the Borrower and SCI are parties to that certain Exchange Agreement, dated as of November 21, 2002 (the "Exchange Agreement"), pursuant to which certain of the Loan
Documents will be amended or terminated;

NOW,
THEREFORE, in consideration of the mutual representations, covenants, and agreements contained herein, the parties hereto, intending to be legally bound, hereby agree as follows:

1.No Liability; Release. The Company and the Borrower agree that, upon completion of the Assignment and the Conversion, the
CSFB Entities will not be a party to the Credit Agreement or any of the Loan Documents, and effective as of such time, the Company and the Borrower hereby release and indemnify the CSFB Entities from
any liability of any kind thereunder (whether for matters occurring before or after the Conversion). The CSFB Entities acknowledge and agree that, upon completion of the Assignment and Conversion,
they will have no further rights or obligations under the Credit Agreement or any of the Loan Documents and will cease to be a party under the Loan Documents.

2.Waiver of Delivery of Notes to the CSFB Entities. The CSFB Entities hereby irrevocably waive the requirement under Section
12.06(d) of the Credit Agreement that the Borrower deliver new Notes representing the principal amount of the CSFB Entities' Maximum Credit Amount following the Assignment.

3.Conversion; Delivery of Stock Certificates. On the Closing Date (as defined in the Assignment Agreement), the Company
shall deliver stock certificates representing the Shares to the CSFB Entities in accordance with the allocations set forth in Schedule A hereto. The CSFB Entities shall not be required to present a
Note representing the outstanding Loans owned in order to effect the Conversion.

4.Waiver of Conversion Notice. The Company and the Borrower hereby irrevocably waive any requirement under the Equity
Conversion Agreement, including but not limited to Section 2.01(h) thereof, to provide any notice of the Conversion.

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5.Inducement Payment. The Company shall pay the CSFB Entities the sum of Five Hundred Thousand Dollars ($500,000) on the
Closing Date as an inducement by the Company to the CSFB Entities to exercise their conversion rights under the Equity Conversion Agreement. In addition, the Company shall pay or reimburse all
reasonable out-of-pocket expenses incurred by the CSFB Entities, including attorneys' fees, in connection with the transactions contemplated by the Assignment Agreement or this Agreement.

6.Conditions Precedent. The effectiveness of this Agreement is subject to the execution and delivery of a consent and waiver
letter executed by the Company, the Borrower, Agent and each of the Lenders in the form attached hereto as Exhibit A.

7.Notices. All notices and other communications provided for herein (including, without limitation, any modifications of, or
waivers, requests or consents under, this Agreement) shall be given or made in writing (including, without limitation, by telex or telecopy) to the intended recipient at its "Address for Notices"
specified below its name on the signature pages hereof or, as to either party, at such other address as shall be designated by such party in a notice to the other party.

8.Amendment, Modification or Waiver. No provision of this Agreement may be amended, modified or waived except by an
instrument in writing signed by the parties.

9.Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of the parties hereto and their
respective successors and assigns.

10.Governing Law. This Agreement shall be, in accordance with New York General Obligations Law Section 5-1401, governed by
and construed in accordance with the laws of the State of New York.

11.Headings. The section headings appearing herein are included solely for convenience of reference and are not intended to
affect the interpretation of any provision of this Agreement.

12.Counterparts. This Agreement may be executed in any number of counterparts, each of which shall be identical and all of
which, taken together, shall constitute one and the same instrument, and each of the parties hereto may execute this Agreement by signing any such counterpart.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK.]

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IN WITNESS WHEREOF, the parties hereto have executed this Agreement, or caused this Agreement to be executed by their respective duly authorized officers, as of the day and year first
above written.

|BRIGHAM EXPLORATION COMPANY                                                          |                                                              |                                                    
|------------------------------------------------------------------------------------ | ------------------------------------------------------------ | ---------------------------------------------------
|By:                                                                                  | /s/DAVID T. BRIGHAM                                          |                                                    
|Name:                                                                                | David T. Brigham                                             |                                                    
|Title:                                                                               | Executive Vice PresidentLand and Administration             |                                                    
|Address for Notice:
6300 Bridge Point ParkwayBuilding Two, Suite 500Austin, TX 78730 |                                                              |                                                    
|BRIGHAM OIL & GAS, L.P.                                                              |                                                              |                                                    
|                                                                                     | By:                                                          | /s/BRIGHAM, INC.                                   
|                                                                                     |                                                              | Its General Partner                                
|                                                                                     |                                                              | By:                                                
|                                                                                     |                                                              | Name:                                              
|                                                                                     |                                                              | Title:                                             
|Address for Notice:
6300 Bridge Point ParkwayBuilding Two, Suite 500Austin, TX 78730 |                                                              |                                                    
|CSFB ENTITIES:                                                                       |                                                              |                                                    
|DLJ MERCHANT BANKING PARTNERS III, L.P.                                             
|By:                                                                                  | DLJ MERCHANT BANKING III, INC.,
its Managing General Partner |                                                    
|                                                                                     | By:                                                          | /s/ROBERT CABESROBERT CABES
      Attorney- in-Fact

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|DLJ MERCHANT BANKING III, INC., AS ADVISORY
GENERAL PARTNER ON BEHALF OF
DLJ OFFSHORE PARTNERS III, C.V.                                                                                                                                
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|                                                                                                                                                                                                                                        
|DLJ MERCHANT BANKING III, INC.,
AS ADVISORY GENERAL PARTNER ON BEHALF OF
DLJ OFFSHORE PARTNERS III-1, C.V. AND AS
ATTORNEY-IN-FACT FOR DLJ MERCHANT BANKING III, L.P.,
AS ASSOCIATE GENERAL PARTNER OF
DLJ OFFSHORE PARTNERS III-1, C.V.
|                                                                                                                                                                                                                                        
|DLJ MERCHANT BANKING III, INC., AS ADVISORY
GENERAL PARTNER ON BEHALF OF
DLJ OFFSHORE PARTNERS III-2, C.V. AND
AS ATTORNEY-IN-FACT FOR DLJ MERCHANT BANKING III, L.P.,
AS ASSOCIATE GENERAL PARTNER OF
DLJ OFFSHORE PARTNERS III-2, C.V.
|                                                                                                                                                                                                                                        
|DLJ MB PARTNERS III GmbH & CO. KG                                                                                                                                                                                                       
|By:                                                                                                                                                                                                                                     
|                                                                                                                                                                                                                                        
|                                                                                                                                                                                                                                        

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|MILLENNIUM PARTNERS II, L.P.                                                                                |                                                                    |                                                    
|----------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------ | ---------------------------------------------------
|By:                                                                                                         | DLJ MERCHANT BANKING III, INC.,
its Managing General Partner       |                                                    
|                                                                                                            | By:                                                                | /s/ROBERT CABESROBERT CABES
      Attorney- in-Fact
|MBP III PLAN INVESTORS, L.P.                                                                                |                                                                    |                                                    
|By:                                                                                                         | DLJ LBO PLANS MANAGEMENT CORPORATION,
its Managing General Partner |                                                    
|                                                                                                            | By:                                                                | /s/ROBERT CABESROBERT CABES
      Attorney- in-Fact
|ADDRESSES FOR NOTICES TO THE CSFB ENTITIES:                                                                
|Global Energy Partners
1100 Louisiana Street
Houston, Texas 77002
Fax: 713-890-1429
Attn: Steven A. Webster
|and                                                                                                        
|CSFB Private Equity
11 Madison Avenue
New York, New York 10010
Fax: 212-448-3502
Attn: Dorian S. Forshner  

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SCHEDULE A

|Holder Name                                                                                                                                                                                                                              |  | No. of Shares
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | -------------
|DLJ Merchant Banking Partners III, L.P.                                                                                                                                                                                                  |  | 1,848,463    
|DLJ Merchant Banking III, Inc., as Advisory General Partner on behalf of DLJ Offshore Partners III, C.V.                                                                                                                                 |  | 100,675      
|DLJ Merchant Banking III, Inc., as Advisory General Partner on behalf of DLJ Offshore Partners III-1, C.V. and as attorney-in-fact for DLJ Merchant Banking III, L.P., as Associate General Partner of DLJ Offshore Partners III-1, C.V. |  | 33,699       
|DLJ Merchant Banking III, Inc., as Advisory General Partner on behalf of DLJ Offshore Partners III-2, C.V. and as attorney-in-fact for DLJ Merchant Banking III, L.P., as Associate General Partner of DLJ Offshore Partners III-2, C.V. |  | 24,005       
|DLJ MB Partners III GmbH & Co. KG                                                                                                                                                                                                        |  | 15,926       
|Millennium Partners II, L.P.                                                                                                                                                                                                             |  | 3,210        
|MBP III Plan Investors, L.P.                                                                                                                                                                                                             |  | 538,124      

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EXHIBIT A

[Brigham
Exploration Company Letterhead]

Bank
of Montreal
700 Louisiana Street, Suite 4400
Houston, Texas 77002

Societe
Generale
1111 Bagby Street, Suite 2020
Houston, Texas 77002

Shell
Capital Inc.
910 Louisiana Street, Suite 5000
Houston, Texas 77002

The
Royal Bank of Scotland plc
600 Travis Street, Suite 6070
Houston, Texas 77002

Re:
Consent and Waiver Request

Gentlemen
and Ladies:

Reference
is made to (a) the Amended and Restated Credit Agreement dated as of February 17, 2000 (as amended to date, the "Senior Credit
Agreement") among Brigham Oil & Gas, L.P., as Borrower ("Borrower"), Bank of Montreal, as Agent (in such capacity,
"Senior Agent", and individually, "BMO"), and BMO, Societe Generale ("Soc
Gen"), and Shell Capital Inc. ("SCI"), as Lenders, and (b) the Subordinated Credit Agreement dated as of October 31, 2000 (as
amended to date, the "Subordinated Credit Agreement") as originally between Borrower and SCI and now among Borrower, the Royal Bank of Scotland plc, as
Agent (as successor to SCI), and the Lenders signatory thereto.

As
used in this consent and waiver letter, "Loan Documents" means the "Loan Documents" as defined in either the Senior Credit Agreement or
the Subordinated Credit Agreement, and "Brigham" means Brigham Exploration Company.

Brigham
and Borrower intend to participate in the transactions or enter into the agreements (a copy of each of which is attached hereto) described below:



A-1

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As
a result of these transactions, both the "Maximum Credit Amount" of SCI under the Senior Credit Agreement and the principal balance of SCI's loans under the Senior Credit Agreement
will be reduced to $30,000,000, and, after giving effect to the Note Conversion, CSFB will have no such "Maximum Credit Amount".

Please
execute a copy of this consent and waiver letter in the space provided below to evidence (a) your consent to the execution of the documents described above and the
consummation of the transactions therein and herein on the terms described above, (b) your agreement that the Assignment Agreement and the Note Conversion may be completed without any issuance
of a new $10,000,000 promissory note to CSFB and without any surrender of such a note by CFSB to Brigham or Borrower, (c) your agreement that, upon completion of the Assignment Agreement and
the Note Conversion, CSFB will not be a party to the Senior Credit Agreement or any of the Loan Documents and your release of CSFB from any liability of any kind thereunder (whether for matters
occurring before or after the Note Conversion), and (d) your agreement to confirm the foregoing in writing directly to CSFB, if hereafter requested to do so.

Brigham
and Borrower hereby (x) waive any requirement in the Loan Documents that the Senior Agent or SCI give either of them notice of any of the transactions described above
(whether under Section 12.06(d) of the Senior Credit Agreement, under the Equity Conversion Agreement, or otherwise), (y) agree to issue a new promissory note to SCI, in the stated
amount of $30,000,000, and (z) confirm to Senior Agent, BMO, Soc Gen and SCI that the Loan Documents remain in full force and effect and (except as described in the Exchange Agreement) will
remain in full force and effect after giving effect to the transactions described above.

This
consent and waiver letter shall be governed by and construed under the laws of the State of Texas. This consent and waiver le tter may be executed in multiple counterparts, and by
the different parties hereto in separate counterparts (which may be delivered, among other ways, by the exchange of faxed signature pages), and all of such counterparts will constitute a single letter
agreement.

A-2

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Thank
you very much for your cooperation.

|                                             |        |                |  | Yours truly,               
|-------------------------------------------- | ------ | -------------- |  | ---------------------------
|                                             |        |                |  | BRIGHAM EXPLORATION COMPANY
|                                             |        |                |  | By:                        
|                                             |        |                |  |                            
|                                             |        |                |  |                            
|                                             |        |                |  | BRIGHAM OIL & GAS, L.P.    
|                                             |        |                |  | By:                        
|                                             |        |                |  |                            
|                                             |        |                |  |                            
|                                             |        |                |  |                            
|CONSENTED TO as of the date
set out above:  
|BANK OF MONTREAL, as Senior Agent and Lender
|By:                                          |        |                |  |                            
|                                             | Name:  |                |  |                            
|                                             | Title: |                |  |                            
|SOCIETE GENERALE                            
|By:                                          |        |                |  |                            
|                                             | Name:  |                |  |                            
|                                             | Title: |                |  |                            
|SHELL CAPITAL INC.                          
|By:                                          |        |                |  |                            
|                                             | Name:  |                |  |                            
|                                             | Title: |                |  |                            
|THE ROYAL BANK OF SCOTLAND plc              
|By:                                          |        |                |  |                            
|                                             | Name:  | Peter Buchanan |  |                            
|                                             | Title: | Director       |  |                            

A-3

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EXHIBIT A

[Description of preferred stock and warrants to come based on final term sheet.]

A-4

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