EXHIBIT 23.5 [CHAPMAN PETROLEUM ENGINEERING LTD. LETTERHEAD APPEARS HERE] March 27, 2001 Neutrino Resources Inc. 1400, 300 - 5th Avenue SW Calgary, Alberta T2P 3C4 Attention: Mr. Al Smith Dear Sir: Re: Neutrino Resources Inc. (the "Company") Consent Letter We hereby consent to the use of and reference to our name and material from our report entitled "Neutrino Resources Inc., Reserve and Economic Evaluation Constant Price/No Cost Escalation Case, dated January 16, 2001 and any other associated reports in the Amendment No. 2 to the Joint Proxy Statement of Southern Mineral Corporation and PetroCorp Incorporated and the Registration Statement on Form S-4 PetroCorp Incorporated and in any required filings with the Securities Exchange Commission (SEC) or any other securities regulatory bodies. Yours very truly, Chapman Petroluem Engineering Ltd. PERMIT TO PRACTICE CHAPMAN PETROLEUM ENGINEERING LTD. By: /s/ CHARLES G.K. MOORE, P. Eng., Signature /s/ CHARLES G.K. MOORE -------------------------------------- ---------------------- Associate Date 03/27/01 --------------------------- PERMIT NUMBER: P 4201 The Association of Professional Engineers. Geologists and Geophysicists of Alberta