Method for researching shale deposition hydrodynamic force

Abstract

The invention discloses a method for researching shale deposition hydrodynamic force, which comprises the following steps: observing a shale sample by adopting an environmental scanning electron microscope to clearly observe mineral particles, and collecting at least 1000 images under the same proportional scale; seamlessly splicing the collected images; determining the type of mineral particles in the shale, and calibrating the mineral particles indicating hydrodynamic force in the shale; carrying out binarization processing on the image of the mineral particle type; performing gray scale segmentation on the binary gray scale image to realize extraction and calculation of the particle size of mineral particles; and establishing a typical mode of the sedimentary environment by utilizing a particle size frequency value accumulation curve graph, and judging a suspension carrying component, a jump carrying component and a rolling carrying component in the sample. According to the method disclosed by the invention, fine determination and statistics can be simply and quickly carried out on the particle size of the mineral particles capable of indicating the deposition hydrodynamic condition in the shale, so that the vacancy of a shale deposition kinetic research method is made up, and the research on the heterogeneity of the deposition environment and the storage performance of the shale in the later period is facilitated.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploration, and in particular relates to a method for studying hydrodynamic forces of shale deposition. Background technique [0002] Shale is a kind of fine-grained sedimentary rock deposited in deep water, with complex composition, but all have thin sheet-like or thin-sheet-like joints, mainly formed by clay deposition through pressure and temperature, but mixed with quartz and feldspar debris and other chemicals. Shale is formed in a still water environment, and sediment has been deposited for a long time, so it often exists in lakes and river deltas, and shale is also formed in oceanic continental shelves. [0003] During the shale deposition process, hydrodynamic conditions will have a very important impact on the mineral composition, particle size, sorting, and grain shape characteristics of the sedimentary particles, which in turn will affect the development of high-quality shale rese...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for studying the hydrodynamics of shale deposition, which solves the problem that the existing methods are not suitable for the study of shale depositional hydrodynamics, and can simply and quickly indicate the depositional hydrodynamics in shale Precise measurement and statistics of the particle size of mineral particles under certain conditions can make up for the vacancy in the research method of shale deposition dynamics, and help to study the heterogeneity of shale depositional environment and reservoir performance in the later stage

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