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Shale gas lithofacies quality evaluation method

A quality evaluation, shale gas technology, applied in the field of shale gas exploration and development, can solve problems such as lack of evaluation methods

Pending Publication Date: 2020-10-20
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, there is currently no such evaluation method

Method used

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  • Shale gas lithofacies quality evaluation method
  • Shale gas lithofacies quality evaluation method
  • Shale gas lithofacies quality evaluation method

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Embodiment Construction

[0039] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0040] The method for evaluating lithofacies quality of shale gas involved in the present invention selects key geological parameters that actually affect shale gas, and quickly and accurately evaluates the lithofacies quality of shale gas through the method of point-dropping of graphic elements.

[0041] specifically, figure 1 It is the basic flow chart of shale gas lithofacies quality evaluation. Such as figure 1 As shown, the above shale gas lithofacies quality evaluation method includes the following steps:

[0042] Firstly, proceed to step S10: according to the basic characteristics of the shale gas, determine the key geological parameters affecting the shale gas and the value range of each of the above key geological parameters. exist figure 1 Among them, this step S10 corresponds to the content shown in S10 in the figure. Since the evaluation me...

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Abstract

The invention provides a shale gas lithofacies quality evaluation method. The method comprises the following steps: the step S10, determining key geological parameters influencing shale gas and a value range of each key geological parameter according to basic characteristics of the shale gas; the step S20, establishing a basic primitive based on the key geological parameters and the value range; and the step S30, obtaining values of all the key geological parameters in different shale lithofacies through measurement, corresponding the values to the basic primitives, and obtaining different closed curves, wherein the area of the closed curve is used for evaluating the quality of the lithofacies. By applying the evaluation method provided by the invention, the shale lithofacies quality can be rapidly and accurately evaluated in the shale gas exploration and development process.

Description

technical field [0001] The invention relates to the field of shale gas exploration and development, in particular to a method for evaluating lithofacies quality of shale gas. Background technique [0002] Shale gas is natural gas that exists in mud shale in both adsorption and free states (Zhang Jinchuan et al., Modern Geology, Issue 4, 2003). It is a typical continuous large-scale unconventional natural gas accumulation. According to the 2013 "World Shale Gas and Shale Oil Resource Evaluation" research results of the U.S. Energy Information Administration / Advanced Resources International Corporation (EIA / ARI), the global shale gas technically recoverable resources are 220.60×1012m 3 , among which, the technically recoverable resources of shale gas in China are 31.55×1012m 3 , accounting for 14.3% of the global resources. It can be seen that my country's shale gas resources are very rich. [0003] Compared with conventional oil and gas resources, shale gas has the charac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06
CPCG06Q10/0639
Inventor 吴靖朱彤刘光祥高波刘忠宝边瑞康
Owner CHINA PETROLEUM & CHEM CORP
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