A method and system for evaluating the seepage capacity of tight oil reservoirs
A tight oil and capacity technology, applied in the field of oil and gas field exploration and development, can solve the problems of inability to accurately evaluate seepage capacity, inapplicability, etc.
Inactive Publication Date: 2016-08-17
PEKING UNIV
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Problems solved by technology
[0005] Obviously, the permeability with pores as the main influencing factor is not applicable in the exploration and development of tight oil, and cannot accurately evaluate its seepage capacity.
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[0064] In order to make the above objectives, features and advantages of the application more obvious and understandable, the application will be further described in detail below in conjunction with the drawings and specific implementations.
[0065] Reference figure 1 , Shows a step flow chart of an embodiment of a method for evaluating the seepage capability of a tight oil reservoir of the present application, which specifically may include the following steps:
[0066] Step 101: Obtain the first content of feldspar in the tight oil reservoir;
[0067] Step 102: Obtain the second content of anorthite, the third content of potassium feldspar, and the fourth content of albite in the feldspar respectively;
[0068] Step 103: Obtain the evaluation result according to a preset rule; the preset rule includes that the first content of the feldspar is proportional to the contribution to the seepage capacity, and the contribution of the anorthite to the seepage capacity is greater than that ...
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Abstract
The present application provides a method for evaluating the seepage capacity of tight oil reservoirs, the method comprising: obtaining the first content of feldspar in the tight oil reservoir; obtaining the second content of anorthite in the feldspar respectively , the third content of potassium feldspar and the fourth content of albite feldspar; the evaluation result is obtained according to the preset rule; the preset rule includes that the first content of the feldspar is proportional to the contribution to seepage capacity, so The contribution of the anorthite to the seepage capacity is greater than the contribution of the potassium feldspar to the seepage capacity, and the contribution of the potassium feldspar to the seepage capacity is greater than the contribution of the albite to the seepage capacity. This application summarizes the contribution of feldspar minerals to the storage and seepage capacity of tight oil reservoirs and their priority in reservoir evaluation, and provides a basis for the evaluation and development of tight oil reservoirs in the future.
Description
Technical field [0001] The invention relates to the technical field of oil and gas field exploration and development, in particular to an evaluation method for the seepage capacity of a tight oil reservoir and an evaluation system for the seepage capacity of a tight oil reservoir. Background technique [0002] With the continuous development of oil and gas exploration and development, the existence of unconventional oil and gas has broken the traditional oil and gas accumulation theory and thinking mode, and has shown great potential under the existing economic and technological conditions. Unconventional oil and gas include tight gas, shale gas, coalbed methane, tight oil, shale oil and oil sands. Tight oil is the abbreviation of tight reservoir oil, which generally refers to tight sandstone, tight carbonate rock, tight volcanic rock, tight metamorphic rock, etc., which are interbedded with or adjacent to the source rock strata. The permeability is less than 1×10 -3 μm 2 Oil res...
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IPC IPC(8): G01N15/08
Inventor 师永民张玉广王磊师巍锋徐蕾师翔郭馨蔚师俊峰熊文涛师春爱吴洛菲方媛媛刘乐盛英帅杜书恒师锋吴文娟秦小双李晓敏柴智
Owner PEKING UNIV