A method and device for producing an oil reservoir

Abstract

The embodiment of the invention provides an oil reservoir production method and device. The oil reservoir production method provides a fracturing mode for injection-production wells in a target oil reservoir, wherein the injection-production wells represent water injection wells or oil production wells in the target oil reservoir. The target oil reservoir comprises a plurality of injection-production well units. The injection-production well units comprise the multiple injection-production wells which are arranged adjacently. The oil reservoir production method comprises the steps that the amount of fracturing liquid of the injection-production wells in the target oil reservoir is determined; according to the fracturing mode and the amount of the fracturing liquid, the injection-productionwells are subjected to fracturing treatment; the flowing bottomhole pressure and the production pressure difference of the injection-production wells subjected to fracturing treatment are determined;water is injected into the injection-production well units in the target oil reservoir, and the water-injected injection-production well units are subjected to well-closing treatment; and after the specified well-closing time, the injection-production wells of the well-closed injection-production well units are subjected to well-opening production based on the flowing bottomhole pressure and theproduction pressure difference of the injection-production wells. According to the technical scheme, the recovery rate of the oil reservoir can be increased.

Description

technical field [0001] The present application relates to the technical field of oilfield development, in particular to an oil reservoir exploitation method and device. Background technique [0002] Natural fractures are developed in low-pressure tight oil reservoirs. The reservoir matrix in this reservoir has low permeability, poor flow capacity, and low pressure coefficient. It can be developed by water flooding, and the formation pressure can be maintained by injecting water. However, under the current waterflooding development mode, the reservoir faces problems such as difficulty in establishing an effective matrix displacement system, water flooding of multi-directional fractures, difficulty in matching the fracture network, and a large proportion of low-production and low-efficiency wells, which may lead to the formation of the reservoir at a low rate. , Low recovery state development. [0003] Therefore, it is necessary to establish a new recovery method for low-pres...

AI Technical Summary

Problems solved by technology

However, under the current waterflooding development mode, the reservoir faces problems such as difficulty in establishing an effective matrix displacement system, water flooding of multi-directional fractures, difficulty in matching the fracture network, and a large proportion of low-production and low-efficiency wells, which may lead to the formation of the reservoir at a low rate. , low recovery state development

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