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Method and system for evaluating seepage capability of dense oil reservoir bed

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: 2014-03-19
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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  • Method and system for evaluating seepage capability of dense oil reservoir bed
  • Method and system for evaluating seepage capability of dense oil reservoir bed
  • Method and system for evaluating seepage capability of dense oil reservoir bed

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Embodiment Construction

[0064]In order to make the above objects, features and advantages of the present application more obvious and comprehensible, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0065] refer to figure 1 , which shows a flow chart of the steps of an embodiment of a method for evaluating the seepage capacity of tight oil reservoirs of the present application, which may specifically include the following steps:

[0066] Step 101, obtaining the first content of feldspar in the tight oil reservoir;

[0067] Step 102, respectively obtaining the second content of anorthite, the third content of potassium feldspar and the fourth content of albite in the feldspar;

[0068] Step 103, obtain the evaluation result according to the 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 ...

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Abstract

The invention provides a method for evaluating a seepage capability of a dense oil reservoir bed. The method includes the steps: acquiring a first content of feldspar in the dense oil reservoir bed; respectively acquiring a second content of calcium feldspar, a third content of potassium feldspar and a fourth content of sodium feldspar in the feldspar; and acquiring an evaluation result according to preset rules. The preset rules include that the first content of the feldspar is directly proportional to the contribution degree of the seepage capability, the contribution degree of the calcium feldspar on the seepage capability is greater than the contribution degree of the potassium feldspar on the seepage capability, and the contribution degree of the potassium feldspar on the seepage capability is greater than the contribution degree of the sodium feldspar on the seepage capability. The contribution of the feldspar group minerals on the reserving seepage capability of the dense oil reservoir bed and the priority level of the feldspar group minerals in reservoir bed evaluation are summarized, and bases are provided for the future evaluation and development of the dense oil reservoir bed.

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 tight oil reservoirs and an evaluation system for the seepage capacity of tight oil reservoirs. 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 theory and thinking mode of oil and gas accumulation, 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, and generally refers to tight sandstone, tight carbonate rock, tight volcanic rock, tight metamorphic rock, etc. that are interbedded with or closely adjacent to oil-generating rocks and have a permeability of less than 1×10 ...

Claims

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Application Information

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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
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