Method for evaluating organic carbon content of shale

An evaluation method and organic carbon technology, which can be used in earth-moving drilling, wellbore/well components, etc., can solve problems such as inability to accurately calculate organic carbon in source rocks, and achieve the effect of eliminating the calculation error of organic carbon content

Active Publication Date: 2014-03-26
PETROCHINA CO LTD
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Problems solved by technology

[0029] In view of this, an object of the present invention is to provide a method for evaluating the organic carbon content of shale in order to overcome the inability to accurately calculate the organic carbon of source rocks in the prior art

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  • Method for evaluating organic carbon content of shale
  • Method for evaluating organic carbon content of shale
  • Method for evaluating organic carbon content of shale

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Embodiment

[0125] Now the embodiment of the present invention will be specifically described through the following examples and comparative examples, so as to further reveal the technical effect that the present invention can achieve.

[0126] In this example, the evaluation method of the organic carbon content of mud shale includes figure 1 Steps S101 to S108 are shown. Specifically, firstly, the logging data of Well A of Eagle Ford are obtained. The logging curve of this embodiment is as figure 2 shown, according to figure 2 According to the mud shale identification method described above, the mud shale layer is located in the formation through lithology identification.

[0127] After determining the mud shale layer to be processed, this embodiment utilizes the correlation between the combination of lithology density and acoustic wave time difference in the tuff interval, the organic matter damage interval, the organic matter normal preservation interval and the lithological compl...

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Abstract

The invention relates to a method for evaluating the organic carbon content of shale. The method comprises the steps that logging information is obtained and layer sections of the shale are obtained through division; lithology correction coefficients and radioactivity correction coefficients are obtained and corrected log response characteristic values are obtained; organic carbon content calculation functions of shale unit layer sections are established and the calculation function of the organic carbon content of each shale unit layer section is obtained; according to the determined organic carbon content calculation function, the organic carbon content of each shale unit layer section is calculated. According to the method for evaluating the organic carbon content of the shale, the defect that an organic carbon content result in the prior art is large in error is overcome, the organic carbon content in a stratum can be accurately and reliably evaluated, and therefore effective technical supports are provided for exploration and development of shale oil gas.

Description

technical field [0001] The invention relates to the field of mud shale oil and gas logging evaluation for oil exploration and development, in particular to an evaluation method for the organic carbon content of mud shale. Background technique [0002] In recent years, with the development of oil and gas exploration and development from conventional oil and gas reservoirs to unconventional oil and gas, shale oil and gas has gradually become an important field of oil and gas exploration and development. In the exploration and development of shale oil and gas, the organic carbon content of mud shale is the key parameter to control the productivity of shale oil and gas and optimize the core area, and it is also the material basis for the source of shale oil and gas. my country has a large amount of shale oil and gas resources. The recoverable resources of shale gas are about 12 trillion cubic meters, and the recoverable resources of shale oil exceed 200 billion tons (source: Chi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 侯连华王京红
Owner PETROCHINA CO LTD
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