Boundary treatment method and device for numerical simulation of oil reservoir

Abstract

The invention relates to an oil reservoir simulation method. The method relates to a region division device, a mesh generation device, a mapping device, an interface processing device and a matrix construction device and a matrix solving device, wherein the region division device is used for dividing an oil reservoir into multiple regions, and the multiple regions at least include a component region and a black oil region; the mesh generation device is used for mesh generation of each region and forming interfaces between the regions; the mapping device is used for mapping the component region and the black oil region to intermediary material to establish correlation; the interface processing device is used for processing the interfaces according to the law of conservation of mass; the matrix construction device is used for constructing a uniform matrix according to the mapping results of the multiple regions and the interface processing results; the matrix solving device is used for solving the uniform matrix. Through the method, data can be exchanged between different regions in real time in simulation, discontinuity of fluid between the regions is eradicated, simulation efficiency can also be improved, and the expansibility of a following simulator is improved.

Description

technical field [0001] The present invention relates to a black oil and component integrated reservoir numerical simulation technology, more specifically, the present invention relates to a method and device for boundary processing in integrated reservoir simulation. Background technique [0002] The application of reservoir numerical simulation technology in the petroleum industry originated in the 1930s, and its basic theory is based on Darcy's law of seepage. With the rapid development of computer technology in recent years, although the existing commercial reservoir numerical simulation technology has made great progress in terms of functional matching and integration, it is still difficult to comprehensively describe the flow phenomenon of multiphase fluids, and to analyze the oil and gas flow from underground to surface. On the quantitative model of the production process, the simplified modeling concepts and customized methods of "black oil", "components" and "thermal...

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Problems solved by technology

[0009] However, whether it is the next-generation Intersect of Schlumberger's flagship product Eclipse simulator series, or the new generation of reservoir numerical simulator Nexus of Landmark, although the conventional three-phase (oil, gas, water) fluid flow is extended to four Phases (solid phases) can only be simulated for the same type of reservoirs, such as black oil, components, etc. Although the reservoir can also be decomposed into regions, it is only for the same type of reservoirs, and the boundaries of the regions are basically Continuous, no special treatment required

[0010] To sum up, the existing reservoir simulation technology is based on a single model, but this application is based on the mixed simulation of black oil and component reservoirs, especially, it is necessary to give the treatment at the boundaries of different regions solution, so there is still room for improvement in the existing technology

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