Reservoir numerical simulation method and device based on downhole flow control equipment

Abstract

The invention provides an oil reservoir numerical simulation method and an oil reservoir numerical simulation device based on downhole flow control equipment. The oil reservoir numerical simulation method comprises the following steps: obtaining data of a production well, an injection well, an oil reservoir and flow control equipment; determining dynamic parameters and static parameters of each well, the oil reservoir and the flow control equipment; establishing a multi-well-section model according to the well body structure of each wheel and the flow control equipment; establishing an oil reservoir seepage model according to oil reservoir characteristics and fluid properties, wherein the oil reservoir seepage model comprises an oil-gas-water three-phase seepage equation, an outer boundary condition and a restraint condition; coupling the multi-well-section model with the oil reservoir seepage model to generate a numerical model; establishing a geological model according to the static parameters of the oil reservoir, and carrying out initialization on the geological model according to a relationship of original formation pressure pressure distribution or pressure and depth as well as rock and fluid properties; and establishing a nonlinear equation set with a sparsity coefficient matrix according to the numerical model and the initialized geological model, and solving the nonlinear equation set.

Description

technical field [0001] The invention relates to oil reservoir numerical simulation technology, in particular to an oil reservoir numerical simulation method and device based on downhole flow control equipment. Background technique [0002] For a long time, reservoir numerical simulation, as a reliable technology in the process of oil and gas field development, has played an irreplaceable role when reservoir engineers make large-scale decisions, evaluate reservoirs, diagnose and improve reservoir productivity. The basic purpose of any well model in numerical reservoir simulation is to provide accurate source and sink terms. In recent years, as China's water drive continental oilfields have generally entered the "double ultra-high" development stage of high water cut and high recovery, the development of ultra-low permeability, low production, low abundance, and high viscosity marginal oilfields has gradually received attention. Multi-lateral wells, horizontal wells and corru...

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Problems solved by technology

The limitations of this method are: ①It is not applicable to horizontal wells and multi-lateral wells with complex well structures; ②It is not applicable to water injection wells with multiple nozzles in the wellbore; ③The separate layer water injection process requires the use of packers, Its influence is not considered in the model; ④ Only water nozzles, a downhole flow control device, are considered, which are only applicable to water injection wells, not yet applicable to oil wells

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