Geologic modeling method for breaking joint type reservoir

Abstract

The invention relates to a geologic modeling method for a breaking joint type reservoir with the reservoir physical property contribution degree mainly composed of faults and cracks. The geologic modeling method comprises the following steps of: (1) performing fault and horizon interpretation of post-stack three-dimensional seismic data; performing horizon tracking and fault pickup on the seismic data volume based on seismic reflection characteristics through human-computer interaction; 2) constructing a three-dimensional stratigraphic framework model; based on the fault and horizon interpretation data, adopting a deterministic modeling method to construct a three-dimensional fault model and a layer model; on this basis, constructing a stratigraphic framework model based on a corner grid modeling method; (3) quantitatively judging the boundary of a fault and crack concentrated development area; adopting a multi-means comprehensive judgment method, synthesizing amplitude changes on earthquakes, permeability changes on well points and water content changes in production dynamic data, and judging boundary values of fault and crack influence ranges; 4) constructing a discrete fracture network model according to scales; carrying out deterministic modeling on a large scale by adopting an ant tracking technology; carrying out random modeling on a small scale by adopting a boundary value constraint method; and 5) establishing a breaking joint type reservoir geologic model; and coarsening the fracture model into the stratigraphic framework model, and coupling the fracture model and the matrix model to form a geologic model of the continuous medium grid. The method can efficiently, accurately and conveniently construct the type of reservoir geologic model, and can be popularized and applied to reservoirs with fault-related fracture development.

Description

technical field [0001] The invention relates to the field of characterization and modeling of underground oil and gas reservoirs, and relates to a geological modeling method for reservoirs with well-developed fault systems. Background technique [0002] Faulted-fracture reservoirs generally refer to the fact that the contribution of reservoir physical properties is mainly composed of faults and fractures, which are widely developed in this type of reservoir; the matrix porosity and permeability of this type of reservoir are relatively low, and oil and gas storage and The migration channels are basically undertaken by faults and fractures. Therefore, it is an urgent problem to construct a reservoir geological model in which the matrix, faults and fractures are coupled together; at the same time, it can also provide important guidance for the later deployment of well locations. There are various types of target bodies in this type of reservoir, and matrix, faults, and fractur...

AI Technical Summary

Problems solved by technology

At present, the conventional modeling method has not yet taken into account the problem of fracture levels; this invention considers the problem of fracture scale classification, and divides cracks into two scales: large scale and small scale, for different scale cracks In the form of different methods, sequentially constructed

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