Method and device for simulating black oil reservoir

Abstract

The invention provides a method and a device for simulating black oil reservoir. The method comprises the following steps of according to component fluid seepage parameters, establishing a component model for describing a black oil reservoir fluid seepage rule; according to the required data for simulating black oil based on the black oil model, performing numerical discretization on the component model, so as to obtain a component number model based on a discrete network of a black oil reservoir geological model; according to fluid PVT (pressure-volume-temperature) data, establishing a component phase balance parameter list; according to the component phase balance parameter list and the evaluation values of the component fluid seepage parameters, performing flash calculation, so as to obtain the fluid phase state and applicable physical parameter; according to the fluid phase state and applicable physical parameter, adjusting the component number model; according to the evaluation values of component fluid seepage parameters and the adjusted component number model, calculating, so as to obtain the oil reservoir pressure change value and the saturation change value of each fluid phase; judging whether the oil reservoir pressure change value and the saturation change value of each fluid phase are convergent or not; when the oil reservoir pressure change value and the saturation change value of each fluid phase are convergent, calculating, so as to obtain the oil reservoir pressure and the saturation of each fluid phase. The method has the advantage that the extendability of oil reservoir number simulation architecture is improved.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a black oil reservoir simulation method and device. Background technique [0002] In the process of oil and gas field development, reservoir numerical simulation technology and devices are mainly used to understand and predict the distribution and migration of underground oil and gas resources. According to different fluid physical properties under isothermal conditions, reservoir numerical simulation can be divided into black oil simulation and component simulation. The black oil simulation is realized based on the black oil model, which describes the oil-gas-water three-phase three-component seepage problem. As the reservoir pressure changes, the oil and gas components can exist alone or in the gas / liquid two-phase; the black oil simulation calculation However, the factors considered are relatively simple; for more complex reservoir development situations such as...

AI Technical Summary

Problems solved by technology

This greatly increases the workload of repeated development of new functions, and directly replaces black oil simulation with component simulation, which requires additional input of component phase equilibrium parameters to complete complex flash calculations, which is not convenient for users and consumes a lot of computing resources

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