Shale bedding identification method

Abstract

An embodiment of the present application provides a shale bedding identification method, the method is as follows: determining the structure and the construction of an outcrop of a target interval; acquiring a rock sample penetrating longitudinally through the target interval, and forming a plurality of longitudinally and continuously-distributed first specification rock cores and a plurality of longitudinally and continuously-distributed second specification rock cores; determining the structure and the construction of each layer of the first specification rock cores and determining the structure and the construction of each layer of the second specification rock cores; and combining the structure and the construction of the outcrop of the target interval, the structure and the construction of each layer of the first specification rock cores and the composition and the structure and the construction of each layer of the second specification rock cores to obtain bedding identificationresults of the target interval. The shale bedding identification method can improve shale bedding recognition accuracy.

Description

technical field [0001] The present application relates to the technical field of shale oil and gas exploration and development, in particular to a method for identifying shale bedding. Background technique [0002] Bedding is a key to interpreting the depositional conditions and evolution history of fine-grained sediments. It determines the microstructure and reservoir performance of shale target intervals, and affects the volumetric fracture propagation law and fracturing effect of horizontal wells. The key to bedding research is to identify laminae, lamina groups and layers, determine their composition and structure, clarify their superimposed relationship, and clarify their lateral distribution and vertical evolution, so as to provide a basis for subsequent evaluation of target intervals and shale gas development. Provide support. Therefore, the study of bedding is of great significance. [0003] At present, there are mainly two kinds of bedding research methods: one is...

AI Technical Summary

Problems solved by technology

Based on the first method, due to the fine grain size of black shale and the susceptibility of samples to weathering, the laminae and lamina groups cannot be identified by naked eyes, so the superimposition relationship between laminae, lamina groups and layers cannot be clarified; based on In the second method, due to the limitations of the field of view and sampling representativeness, it is difficult to solve problems such as layer identification, macroscopic morphology and superposition relationship of laminae and lamina groups, lateral distribution and longitudinal evolution of each lamina and lamina groups

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