Sand-carrying oil production method based on hydraulic jet pump

Abstract

The invention discloses a method for sand carrying oil extraction based on a hydraulic jet pump, and belongs to the technical field of oil exploitation. The method comprises the steps that power liquid is injected into the hydraulic jet pump through inner and outer annular tubes between a shaft sleeve and the hydraulic jet pump inside a target oil well and a pump core runner at the side end of thehydraulic jet pump, under the effect of a negative pressure region inside a throat, stratum liquid comprising oil is sucked into the throat through a pumping inlet at the lower end of the hydraulic jet pump, the stratum liquid and the power liquid are mixed to obtain a mixed solution, the mixed solution is injected into a diffusion room at the upper portion of the throat and an inner tube of thehydraulic jet pump from the throat so as to be drained out of the ground. The power liquid is injected into the hydraulic jet pump from the inner and outer annular tubes to be mixed with the stratum liquid to form the mixed solution, then, the mixed solution is drained out of the ground from the inner tube, and the purpose of oil exploitation is achieved; on the condition that the oil well sand production rate is low and the liquid production capacity is high, the flow of the mixed solution is increased, the oil production amount of the system is increased, and therefore the pump efficiency isimproved.

Description

technical field [0001] The invention relates to the technical field of oil exploitation, in particular to a sand-carrying oil extraction method based on a hydraulic jet pump. Background technique [0002] With the continuous in-depth development of most oilfields in my country, the water content of oil wells increases year by year, and the formation pressure gradually decreases, which enlarges the pressure difference production, resulting in serious formation sand production. At present, there are mainly two oil recovery methods for sand producing oil wells: sand control oil recovery and sand carrying oil recovery. Compared with sand control oil recovery, sand-carrying oil recovery uses a certain method to discharge the oil-sand mixture from the surface without using sand control devices. It is not only suitable for oil wells containing coarse sand, but also for oil wells containing fine sand. Hydraulic jet pump negative pressure sand washing technology is a commonly used t...

AI Technical Summary

Problems solved by technology

Due to the smaller cross-sectional area of ​​the downhole mixing liquid pipe, in the case of less sand production and high fluid production in the oil well, the use of the existing technology will lead to low pump efficiency of the oil well

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