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Method for online in-situ determination of organic matter content of hydrocarbon source rock

A technology for organic matter content and source rocks, applied in measuring devices, test sample preparation, sampling, etc., can solve problems such as difficult to describe organic matter content characteristics, test results are difficult to represent, and achieve analysis efficiency and automation High, simple process effect

Pending Publication Date: 2021-02-12
YANGTZE UNIVERSITY
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Problems solved by technology

[0003] However, due to the strong heterogeneity of shale, the whole-rock method only obtains the average organic carbon content of rocks, and it is difficult to describe the organic matter content characteristics of different laminae or different points of interest in them.
At the same time, the amount required for the determination of organic carbon is very small, and the test results are difficult to be representative as a whole

Method used

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  • Method for online in-situ determination of organic matter content of hydrocarbon source rock
  • Method for online in-situ determination of organic matter content of hydrocarbon source rock

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Embodiment Construction

[0016] The following examples of the present invention are described in detail below. The following examples are implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the embodiment.

[0017] The inventor took two source rock samples (sample 1 and sample 2) collected from the Sichuan Basin as Example 1 and Example 2, and carried out online in-situ organic matter content determination, the method is as follows:

[0018] Step 1. Sample preparation: remove the surface efflorescence of the source rock sample, and smooth the surface of the sample with 20-60 mesh, 800-1000 mesh, 1200-1500 mesh, and 2000-2500 mesh water sandpaper in sequence on a grinding and polishing machine; Then, on the polishing cloth, use aluminum oxide polishing solution to polish for about 20 minutes until no scratches ca...

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Abstract

The invention provides a method for online in-situ determination of the organic matter content of the hydrocarbon source rock. On one hand, an area can be selected in situ according to the thought ofresearchers, the relative percentage content of organic matter is measured, the process is simple, and the analysis efficiency and the automation degree are high; on the other hand, the particle sizedistribution of the organic matter can be subjected to statistical analysis, so that the degradation degree in the organic matter deposition process and the deposition environment information during hydrocarbon source rock organic matter deposition are indicated, and richer and more comprehensive information can be provided.

Description

technical field [0001] The invention belongs to the technical field of petroleum geology, and in particular relates to a method for on-line and in-situ determination of the organic matter content of source rocks. Background technique [0002] With the deepening of shale oil and gas exploration and development, the characteristics of organic matter in shale are important indicators for evaluating shale oil and gas. The Sichuan Basin and its surrounding areas are the most important shale gas producing areas in China, with geological reserves of shale gas of 62.56×10 12 m 3 , recoverable reserves 9.94×10 12 m 3 . Two sets of important shale gas reservoirs developed in the Lower Paleozoic in this area are the Lower Cambrian Niutitang Formation or Qiongzhusi Formation and the Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation. Previous studies have shown that high-quality shale gas reservoirs in the Longmaxi Formation are usually located in the siliceous sha...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/32G01N21/84G01N23/2202G01N23/225
CPCG01N1/286G01N1/32G01N21/84G01N23/2202G01N23/225G01N2001/2866
Inventor 谢小敏朱光有唐友军文志刚
Owner YANGTZE UNIVERSITY
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