Fine-grained sediment outcrop researching method

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 ...

AI Technical Summary

Problems solved by technology

Due to the late start and slow progress of domestic research on fine-grained sediments, a set of feasible research steps and methods for fine-grained sedimentary outcrops has not been proposed so far.

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