Method and device for determining evaluation index of unconventional oil and gas reservoirs
A determination method and technology of oil and gas reservoirs, applied in the direction of measuring devices, seismology for well logging records, seismology, etc., can solve the problem of inaccurate and complete evaluation index results, and achieve the effect of improving the success rate of drilling
Active Publication Date: 2022-03-29
PETROCHINA CO LTD
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[0005] Oil and gas reservoir evaluation is only based on the evaluation of reservoir porosity, reservoir thickness, fracture development and structural location, etc., and the unique geological conditions and reservoir physical properties of unconventional oil and gas reservoirs are evaluated and analyzed by the above methods to obtain The evaluation index results are not accurate and complete enough
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[0053] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.
[0054] The embodiment of the present invention provides a method for determining the evaluation index of unconventional oil and gas reservoirs, such as figure 1 As shown, the method includes:
[0055] In step S101, the residual organic carbon content evaluation index of the earthquake is acquired;
[0056] In step S102, a relatively high-quality reservoir evaluation index is obtained;
[0057] In step S103, the relatively high-quality reservoir thickness is obtained;
[0058] In step S104, obtain the fracture density evaluation index;
[0059] In step S105, the unconventional oil and gas reservoir evaluation index is obtained according to the seismic residual organic carbon content evaluation index, relatively high-quality reservo...
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The invention discloses a method and a device for determining evaluation indexes of unconventional oil and gas reservoirs, and belongs to the technical field of oil and gas field geophysical prospecting engineering. The method includes: acquiring the seismic residual organic carbon content evaluation index, relatively high-quality reservoir evaluation index, relatively high-quality reservoir thickness and fracture density evaluation index; according to the seismic residual organic carbon content evaluation index, the relatively high-quality reservoir The unconventional oil and gas reservoir evaluation index is obtained by combining the layer evaluation index, the thickness of the relatively high-quality reservoir and the fracture density evaluation index. According to the control factors of unconventional oil and gas reservoirs, the present invention proposes comprehensive evaluation factors suitable for unconventional oil and gas reservoirs, and quantifies them, so as to achieve the purpose of accurately evaluating unconventional oil and gas reservoirs, predicting the distribution of oil and gas enrichment areas, and improving drilling efficiency. Success rate.
Description
technical field [0001] The invention belongs to the technical field of oil and gas field geophysical prospecting engineering, and in particular relates to a method and a device for determining evaluation indexes of unconventional oil and gas reservoirs. Background technique [0002] Unconventional oil and gas reservoirs are generally characterized by complex geological conditions, poor reservoir physical properties, and strong heterogeneity. It is difficult to recover oil and gas, and the law of production decline is complex, which makes it difficult to predict medium and long-term production capacity, and thus cannot accurately predict production in undeveloped periods. Production degree, recoverable reserves, ultimate recovery rate and development period, etc. Therefore, it is necessary to propose an evaluation index for unconventional oil and gas reservoirs, to propose comprehensive evaluation factors suitable for unconventional oil and gas reservoirs, and quantify them t...
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IPC IPC(8): G01V1/30G01V1/50
CPCG01V1/306G01V1/50G01V2210/624
Inventor 黄平肖富森张福宏安辉邹定永马波
Owner PETROCHINA CO LTD