Water-controlling air-injecting and oil-extracting integrated production-increasing method

Abstract

The invention discloses a water-controlling air-injecting and oil-extracting integrated production-increasing method which controls the water yield, improves the oil-extracting quantity in the developmental process of an oil reservoir with the high water content or huge water discharging risks and comprises the steps of nitrogen-injecting foam water plugging, water-controlling agent water controlling, nitrogen-injecting rigidity oil driving, carbon dioxide oil extracting and ordered combination of all the single steps. According to the water-controlling air-injecting and oil-extracting integrated production-increasing method, effective water blocking and deep-layer water controlling can be conducted at the oil reservoir of bottom water coning, water layer channeling, water injecting or edge water incursion, oil-water layer according, large-angle crack and water layer communicating and the water-containing oil reservoir which cannot conduct mechanical water blocking due to casing pipe deformation, the water yield or the water discharging risks in the oil reservoir developing process are reduced, and meanwhile, effective employ for residual oil resources distributed in different regions is achieved, so that the demands of water-controlling oil-increasing and efficient developing of the oil reservoir containing water are met, and the comprehensive developing benefits are improved.

Description

technical field [0001] The invention provides a production stimulation method for controlling water production and increasing oil production in the development process of reservoirs with high water cut or huge water production risks, and specifically relates to an integrated production stimulation method for water control, gas injection and oil production. Background technique [0002] In the process of reservoir development, due to reasons such as bottom water coning, water layer channeling, injected water or edge water intrusion, oil and water in the same layer, and large-angle fractures communicating with the water layer, etc., the water yield and water cut of the oil well often increase. Even violent water flooding will lead to the reduction of oil production or even no oil production of the oil well, which will lead to shutdown, resulting in low recovery degree of oil reservoir and poor development effect. Therefore, for oil reservoirs that have produced water during th...

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Problems solved by technology

[0005] The purpose of the present invention is to provide an integrated production stimulation method for water control, gas injection and oil recovery, which mainly solves the problems of poor water plugging and water control effects, oil production of oil wells and underground crude oil recovery in the development process of high water content reservoirs and reservoirs facing huge water production risks. In order to solve the problems of low degree, the present invention provides a method capable of realizing efficient water shutoff and water control and effectively improving the oil recovery rate of water-bearing oil reservoirs

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