Fine-grained sediment outcrop researching method

A fine-grained and cross-sectional technique, applied in the field of fine-grained sedimentary outcrop research, can solve the problems of late start and slow progress

Inactive Publication Date: 2018-04-20
PETROCHINA CO LTD
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Problems solved by technology

Due to the late start and slow progress of domestic research on fine-grained sediments, a set of fea

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  • Fine-grained sediment outcrop researching method

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[0040] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0041] In the following, the Wufeng Formation of the Shuanghe section in Changning, Sichuan Basin will be studied as an example, and the research method for the fine-grained sedimentary outcrop described in the present invention will be introduced in detail.

[0042] A research method for fine-grained sedimentary outcrops, comprising the following steps:

[0043] Step 1. Select the standard section according to the three principles of complete exposure, fresh layer, and ease of work.

[0044] Specifically, step 1 includes the following steps:

[0045] Step 1.1. With the help of geological maps, select a standard profile through field surveys. The profile is required to be completely exposed, ...

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Abstract

The invention discloses a fine-grained sediment outcrop researching method. The method comprises the following steps: 1) selecting a standard profile; 2) using a sequence stratigraphy principle to determine a stratigraphic framework, and taking standard entity fossil as a basis to establish the age stratigraphic framework; 3) continuously sampling by a system; 4) polishing the sample, describing composition, structure and construction of a black mudstone lamina, 5) developing a characteristic analysis on a reservoir of the black mudstone; and 6) developing rock mechanics and stress sensitivityanalysis of the black mudstone. The fine-grained sediment outcrop researching method uses outcrop data, establishes the stratigraphic framework of the fine-grained sediment, can symptom characteristic of the fine-grained sediment and the rock mechanical property, and provides the basis for evaluating the resource potential of the black mudstone and shale gas exploitation.

Description

technical field [0001] The invention relates to the field of shale oil and shale gas geological exploration and development engineering, in particular to a research method for fine-grained sedimentary outcrops. Background technique [0002] Fine-grained sediments refer to sediments and sedimentary rocks with a particle size of less than 62.5 μm, composed of exogenous components and endogenous components, including continental clasts, organic matter, bioclastic particles, and authigenic minerals. Due to the fine particle size and the difficulty in the study of hand specimens, fine-grained sediments have always been considered to be homogeneous or massive, formed by the suspension and sedimentation of low-energy water bodies. In recent years, outcrop and core observations, especially flume experiments have confirmed that fine-grained sediments can not only form in still water environments, but also accumulate under certain water flow rates. When the particle diameter is less ...

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Application Information

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IPC IPC(8): G01N33/24G01N1/32
CPCG01N1/32G01N33/24
Inventor 施振生董大忠邱振梁萍萍张晨晨卢斌桂婷婷
Owner PETROCHINA CO LTD
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