Pore, cave and fissure three-dimensional distribution representation method in oil-gas reservoir

Abstract

The invention discloses a pore, cave and fissure three-dimensional distribution representation method in an oil-gas reservoir, which comprises the following steps: 1, pores, caves and fissures in the oil-gas reservoir are recognized through observation; 2, according to reservoir permeability of the pores, the caves and the fissures, pore, cave and fissure combination types are distinguished, and the combination types are mapped to corresponding reservoir permeability medium phase types; and 3, on the basis of reservoir permeability medium phase data discrete processing, a random modeling method is used for establishing a reservoir permeability medium phase model for representing pore, cave and fissure three-dimensional distribution. According to the disclosed representation method, cross-scale transfer and multi-space fusion of the pore, cave and fissure information can be realized, and multi-scale pore, cave and fissure space distribution features are described in the same geological model.

Description

technical field [0001] The invention relates to a distribution characterization method, in particular to a three-dimensional distribution characterization method of reservoir pores, caves and fractures in oil and gas exploration, and belongs to the fields of resource exploration and geology. Background technique [0002] Pores, caves, and fractures are the places where fluid deposits depend on for storage. The identification and characterization of pores, caves, and fractures is one of the problems that must be solved first in the process of exploration and development of fluid deposits. At present, people have developed various technologies for identifying holes, holes, and cracks, relying on these technologies to identify holes, holes, and cracks of various scales, as small as nanometers, roughly meters to tens of meters, but the identified holes, holes , Seam data processing has always been one of the difficult problems in this field for a long time. [0003] Due to the ...

AI Technical Summary

Problems solved by technology

Existing technical solutions usually can only describe the distribution of pores, holes, and fractures within a certain scale, while ignoring the distribution of pores, holes, and fractures within other scales, and cannot integrate the information of pores, holes, and fractures developed in geological bodies. , so this representation is incomplete

In practical applications, this method either characterizes the distribution of microscopic pores and fractures in the microscopic model, or characterizes the distribution of macroscopic fractures and caves in the macroscopic model, or characterizes the distribution of large-scale fractures and caves in a larger scale, and cannot be combined in the same geological model. Completely display the distribution characteristics of fluids in geological bodies

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