A method and device for obtaining electrical parameters of tight sandstone

A rock-electricity and parameter technology, which is applied in the field of tight sandstone rock-electrical parameter acquisition, can solve the problems of low accuracy and complex conductivity law of tight sandstone reservoirs, and achieve the effect of accurate saturation.

Active Publication Date: 2019-11-08
PETROCHINA CO LTD
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Problems solved by technology

In the case of complex pore structures, the electrical conduction law of tight sandstone reservoirs becomes very complicated. For such tight sandstone reservoirs, the calculation based on fixed rock-electrical parameters has certain inapplicability
Saturation calculated based on fixed cementation index and saturation index, the accuracy of calculation results is low

Method used

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  • A method and device for obtaining electrical parameters of tight sandstone
  • A method and device for obtaining electrical parameters of tight sandstone
  • A method and device for obtaining electrical parameters of tight sandstone

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Embodiment Construction

[0023] In order to make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the schematic embodiments and descriptions of the embodiments of the present application are used to explain the embodiments of the present application, but are not intended to limit the embodiments of the present application.

[0024] The specific implementation manners of the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0025] Such as figure 1 Shown is a schematic flow chart of a method for obtaining tight sandstone rock electrical parameters in the embodiment of the present application, as figure 1 As shown, a method for obtaining rock electrical parameters of tight sandstone may include the following steps. ...

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Abstract

The embodiment of the application provides a rock-electro parameter acquisition method and device of tight sandstone. The method comprises the following steps: acquiring logging information of a target layer and a rock-electro parameter of a core with preset number, wherein the cores are located in the target layer; determining a relation between the rock-electro parameter and a nuclear magnetic resonance T2s spectrum and pore structure parameter in the core logging document; and determining the rock-electro parameter of the target layer according to the relation and the logging information. By use of the method provided by the embodiment of the application, the high-precision rock-electro parameter can be acquired.

Description

technical field [0001] The present application relates to the technical field of oil exploration oil and gas reservoir logging evaluation technology, in particular to a method and device for obtaining rock electrical parameters of tight sandstone. Background technique [0002] In recent years, the output of conventional oil and gas resources has declined year by year, and the exploration and development of unconventional oil and gas energy has attracted great attention from the energy circles at home and abroad. Unconventional oil and gas accounts for an increasing proportion of global oil and gas production, and plays an important role in the global energy structure. Tight oil is an important unconventional oil resource. The so-called tight oil refers to sandstone reservoirs with low porosity, low permeability or even ultra-low porosity and permeability. There is no natural production capacity or the natural production capacity is very low, and it needs to be formed by frac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50E21B49/00
CPCE21B49/00G06F30/20
Inventor 胡胜福周灿灿李霞刘淑文李潮流刘忠华袁超
Owner PETROCHINA CO LTD
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