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Partitioning method of rich-organic-matter mudstone section and low-organic-matter mudstone section

An organic-rich, organic-matter technology, applied in the field of organic-rich mudstone geological exploration and evaluation design, to achieve the effect of reducing the cost of characterization

Active Publication Date: 2016-12-21
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for dividing organic-rich mudstone sections and low-organic-matter mudstone sections to solve the technical problems in the prior art

Method used

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  • Partitioning method of rich-organic-matter mudstone section and low-organic-matter mudstone section
  • Partitioning method of rich-organic-matter mudstone section and low-organic-matter mudstone section
  • Partitioning method of rich-organic-matter mudstone section and low-organic-matter mudstone section

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Experimental program
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Embodiment 1

[0030] Taking Well Zhaotong 4 as an example, the characterization method for the organic-rich mudstone structure of the whole well is as follows:

[0031] (A) Using conventional mud logging data and conventional logging data to identify the low organic matter mudstone interval in Well Zhaotong 4;

[0032] (A1) Identify silty mudstone by using the conventional mud logging data map: According to the conventional mud logging data map of Well Zhaotong 4 in the study area, the section with siltstone and silty mudstone is defined as silty mudstone section. Three sections of silty mudstone sections were identified, mainly including: 1889m-1892m, 1994m-1996m, 2001m-2044m;

[0033] (A2) Carry out equidistant sampling in rock core, and carry out whole rock analysis to sampling point, obtain the calcium salt content of sampling point, according to linear regression, obtain the coefficient in the calculation formula of calcium salt content: Calcium salt content=-0.940×SP+ 0.016×LLD-1.95...

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Abstract

The invention provides a partitioning method of a rich-organic-matter mudstone section and a low-organic-matter mudstone section, which is characterized by comprising the following steps: identifying a silty mudstone in a low-organic-matter mudstone section based on conventional logging data; setting multiple sampling points on the core of the mudstone, and making a whole rock analysis of the sampling points to get the calcium salt content of the sampling points; and identifying a calcareous mudstone in the low-organic-matter mudstone section of a whole well based on the determined coefficients of a linear regression equation. By eliminating the interference of the low-organic-matter mudstone section, the scope of a rich-organic-matter mudstone section is determined effectively.

Description

technical field [0001] The invention relates to the technical field of organic-rich mudstone geological exploration and evaluation design, in particular to a method for dividing organic-rich mudstone sections and low-organic-matter mudstone sections. Background technique [0002] The structural characteristics of organic-rich mudstone are closely related to their depositional environment. These organic-rich intervals are not only an important source of solid combustible minerals in my country, but also important source rocks for many large gas fields in my country. It is of great significance to study the scientific mechanism and guide the exploration and development of oil and natural gas. [0003] However, at present, the characterization method of underground organic-rich mudstone structure is mainly obtained by core observation. Due to the high cost of coring, the lack of coring layers, and the influence of subjective factors on the accuracy of core observation, the under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 张元福张海波姜在兴王志峰胡晨林
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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