3D Digital Core Modeling Method for Fracture Network

Abstract

The invention provides a fracture network 3D digital core modeling method comprising the steps as follows: step 1, using a CT scanning method or numerical method to establish a rock matrix 3D digital core; step 2, using a random method to generate a fractal discrete fracture network FDFN based on the assumption that fracture distribution satisfies the fractal characteristics; and step 3, discretizing the FDFN and superposing the FDFN and the rock matrix digital core voxel by voxel to obtain a fracture network 3D digital core. By adopting the fracture network 3D digital core modeling method of the invention, the problem that a representative core can be hardly obtained for a fractured reservoir is solved, and a research platform is provided for numerical simulation research of the physical properties of rocks in the fractured reservoir. Therefore, the method is worth promotion.

Description

technical field [0001] The invention relates to the field of rock physics research, in particular to a three-dimensional digital core modeling method for a fracture network. Background technique [0002] There are two main types of modeling methods for digital cores: one is physical methods, which construct digital cores by directly imaging core samples with experimental instruments. There are mainly sequential two-dimensional slice stacking imaging methods, confocal laser scanning methods and nondestructive X-ray CT. Scanning and imaging methods; the other is mathematical methods, which are based on high-precision two-dimensional thin-section images to reconstruct three-dimensional digital cores through stochastic simulation or geological process simulation. [0003] Since it takes a lot of time to repeatedly cut, plan and image the surface of the sample by the sequential 2D slice stacking imaging method, the digital core constructed by the confocal laser scanning method is...

AI Technical Summary

Problems solved by technology

The digital core established by the process simulation method has good pore connectivity, but it is generally only suitable for the reconstruction of digital cores of simple rocks in the diagenetic process

[0007] From the perspective of numerous digital core modeling methods at present, the research mainly focuses on the modeling method of digital core for porous reservoirs, while the research on digital core modeling methods for fractured reservoirs is less

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