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EXHIBIT 99.4
 BRIGHAM EXPLORATION COMPANY
    Letter to Clientsfor Tender of All
    Outstanding
    95/8% Senior
    Notes due 2014
    in Exchange for Registered
    95/8% Senior
    Notes due 2014
  THE EXCHANGE OFFER WILL EXPIRE
    AT 5:00 P.M., NEW YORK CITY TIME,
    ON          ,
    2007, UNLESS SOONER TERMINATED OR EXTENDED. OUTSTANDING
    NOTES TENDERED IN THE EXCHANGE OFFER MAY BE WITHDRAWN AT
    ANY TIME PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON THE
    EXPIRATION DATE.
    5 8 5 8
        
    any Exchange Notes received are being acquired in the ordinary
    course of business of the person receiving such Exchange Notes;
    such person does not have an arrangement or understanding with
    any person to participate in the distribution of the Outstanding
    Notes or the Exchange Notes within the meaning of the Securities
    Act;
    such person is not an affiliate, as defined in
    Rule 405 under the Securities Act, of BEXP or any
    guarantor, or, if it is such an affiliate, it will comply with
    the registration and prospectus delivery requirements of the
    Securities Act to the extent applicable;
    if such person is not a broker-dealer, it is not engaged in, and
    does not intend to engage in, a distribution of Exchange Notes;
    if such person is a broker-dealer, it will receive Exchange
    Notes in exchange for Outstanding Notes that were acquired for
    its own account as a result of market-making activities or other
    trading activities, and it will deliver a prospectus in
    connection with any resale of such Exchange Notes; however, by
    so acknowledging and by delivering a prospectus, it will not be
    deemed to admit that it is an underwriter within the
    meaning of the Securities Act;




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
    if such person is a broker-dealer, it did not purchase the
    Outstanding Notes to be exchanged for the Exchange Notes from
    BEXP or any guarantor; and
    such person is not acting on behalf of any person who could not
    truthfully and completely make the foregoing representations.     Please return your instructions to us in the enclosed
    envelope within ample time to permit us to submit a tender on
    your behalf prior to the expiration date of the exchange
    offer.
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INSTRUCTION TO
    DTC PARTICIPANT
    5 8 5 8
        o
  o
  o
  If no box is checked, a signed and returned Instruction to
    DTC Participant will be deemed to instruct you to tender all
    Outstanding Notes held by you for the account of the
    undersigned.
    
    any Exchange Notes received are being acquired in the ordinary
    course of business of the undersigned;
    the undersigned does not have an arrangement or understanding
    with any person to participate in the distribution of the
    Outstanding Notes or the Exchange Notes within the meaning of
    the Securities Act;
    the undersigned is not an affiliate, as defined in
    Rule 405 under the Securities Act, of BEXP or any
    guarantor, or, if it is such an affiliate, it will comply with
    the registration and prospectus delivery requirements of the
    Securities Act to the extent applicable;
    if the undersigned is not a broker-dealer, it is not engaged in,
    and does not intend to engage in, a distribution of Exchange
    Notes;
    if the undersigned is a broker-dealer, it will receive Exchange
    Notes in exchange for Outstanding Notes that were acquired for
    its own account as a result of market-making activities or other
    trading activities, and it will deliver a prospectus in
    connection with any resale of such Exchange Notes; however, by
    so acknowledging and by delivering a prospectus, the undersigned
    will not be deemed to admit that it is an
    underwriter within the meaning of the Securities Act;
    if the undersigned is a broker-dealer, it did not purchase the
    Outstanding Notes to be exchanged for the Exchange Notes from
    BEXP or any guarantor; and
    the undersigned is not acting on behalf of any person who could
    not truthfully and completely make the foregoing representations. 3




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SIGN
    HERE
  Name of beneficial owner(s):  Signature(s):  Name(s) (please print):  Address:  Telephone Number:  Taxpayer Identification or Social Security
    Number:  Date:
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