Multi-scale fracture modeling method

A modeling method and multi-scale technology, applied in the field of fracture modeling, to achieve the effect of promoting understanding and improving application effect

Inactive Publication Date: 2012-09-05
BEIJING NORMAL UNIVERSITY
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[0009] This embodiment is applicable to areas with seismic data and imaging logging data.

[0010] In the early stage, the structural and sedimentary backgrounds of several research areas were systematically studied, and the LavRAMArami laser confocal Raman spectroscopy device was used to observe the 1μm cracks 2 changes in the crack structure. At the same time, the Raman spectrometer equipped with the instrument can further obtain the characteristics of the material composition and structure of the fracture, as well as the characteristics of the dynamic response law, and analyze the microscopic expansion law of the fracture. On the basis of stratigraphic correlation, through the study of lithology characteristics, sedimentary structure, structure, grain size, paleontology, electrical properties and other characteristics of coring wells, the mudstone color, clastic rock composition maturity, structure maturity, distribution of heavy minerals. Based on the multi-scale fractur...

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Abstract

The invention provides a multi-scale facture modeling method. Fractured oil-gas reservoir is a new field in modern oil-gas exploration and development, and fracture modeling becomes a focus and a difficulty in reservoir modeling technology at home and abroad. The existing reservoir fracture modeling method ignores the essential relationship between rock microscopic pore attribute random distribution characteristics and an oil reservoir macroscopic fracture expansion principle, so that effective regional fracture multi-scale three-dimensional information cannot be given out. According to the invention, aiming at the difficulty of multi-scale modeling of fractures, a random expanded finite element multi-scale fracture modeling study based on geological statistics principle and fracture mechanics is planned to be developed, and the multi-scale fracture modeling simulated based on random expanded finite elements is finally realized. The method provided by the invention and the developed software tools contribute to understand reservoir fracture multi-scale characteristics and improve application effects of a reservoir fracture model.

Description

technical field [0001] The invention relates to fracture modeling technology in reservoir modeling. Background technique [0002] The fine description and modeling technology of reservoir fractures is a worldwide problem in petroleum geology, and it is still in the exploration stage. Actual rock formation fractures are controlled by the local stress field of the formation, rock properties and their spatial distribution. If the fracture distribution is predicted without analyzing the structural evolution history, the credibility of the fracture model will be greatly reduced. The existing discrete fracture network models mainly rely on well-constrained data for simulation, which not only lacks the simulation analysis of the stress field at the fault tip, but also lacks information on the evolution process of the fault and its three-dimensional extrapolation when modeling the fracture. In fact, the simulation of fault propagation dynamics based entirely on fracture mechanics,...

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Application Information

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IPC IPC(8): G01V11/00
Inventor 张金亮唐明明任伟伟
Owner BEIJING NORMAL UNIVERSITY
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