Determination method and device for content of organic carbon in hydrocarbon source rocks

A method for measuring organic carbon, which is applied in the field of oil and gas exploration, and can solve problems such as the inability to accurately obtain the volume fraction of organic carbon

Inactive Publication Date: 2017-08-18
PETROCHINA CO LTD
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  • Application Information

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Problems solved by technology

The scanning electron microscope imaging method can only show the distribution characteristics of organic matter on a two-dimensional plane, and cannot accurately obtain the volume fraction of organic carbon content in the sample space

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  • Determination method and device for content of organic carbon in hydrocarbon source rocks
  • Determination method and device for content of organic carbon in hydrocarbon source rocks
  • Determination method and device for content of organic carbon in hydrocarbon source rocks

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Embodiment Construction

[0022] 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.

[0023] The specific implementation manners of the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0024] refer to figure 1 As shown, a method for determining the organic carbon content of source rocks provided in the embodiments of the present application may include the following steps. The source rock may refer to a rock that produces or has produced mobile hydrocarbons, for example, shal...

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Abstract

The embodiment of the invention provides a determination method and device for the content of organic carbon in hydrocarbon source rocks. The method provided by the invention comprises the following steps: obtaining a first three-dimensional CT (Computerized Tomography) scanning image and a background CT scanning image of a rock core; carrying out background value deduction on the first three-dimensional CT scanning image according to the background CT scanning image, so as to obtain a second three-dimensional CT scanning image; identifying pixel points which are covered by the organic carbon in the second three-dimensional CT scanning image according to gray values of all pixel points in the second three-dimensional CT scanning image; obtaining space distribution of the organic carbon of the rock core and the volume fraction of the organic carbon according to the pixel points covered by the organic carbon. According to the determination method and device, provided by the embodiment of the invention, three-dimensional space distribution characteristics of the organic carbon can be directly displayed; meanwhile, the volume fraction of the content of the organic carbon is accurately obtained.

Description

technical field [0001] The present application relates to the technical field of oil and gas exploration, in particular to a method and device for measuring the organic carbon content of source rocks. Background technique [0002] A source rock is a rock capable of producing or has produced mobile hydrocarbons. Generally, it can be defined as a rock rich in organic matter, producing and expelling oil and gas in large quantities. Source rock evaluation is one of the important contents of oil and gas exploration and resource evaluation, and organic matter abundance, as a key parameter of source rock evaluation, has always been the focus of theoretical research on petroleum geology. When evaluating the abundance of organic matter, organic carbon content is the most widely used evaluation parameter. [0003] At present, the commonly used methods for the determination of organic carbon content mainly include: laboratory measurement method and scanning electron microscope imagin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/04
CPCG01N23/046
Inventor 吴松涛翟秀芬张响响崔景伟杨智
Owner PETROCHINA CO LTD
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