Water-bearing oil well oil-water recovery device and water-bearing oil well oil-water recovery method

Abstract

The invention discloses an oil and water separated mining device for a water-containing oil well, and further relates to an oil and water separated mining method for the water-containing oil well. Theoil and water separated mining device comprises an oil pipe, an oil and water separating tube, an oil and water separated mining pump and a hollow oil pumping rod. The oil and water separating tube is arranged on the lower portion of the oil pipe, used for oil and water separation and provided with an oil liquid channel and a water channel. The upper end of the oil and water separated mining pumpis connected with the oil pipe; the lower end of the oil and water separated mining pump is connected with the oil and water separating tube; the oil and water separated mining pump is provided withan oil liquid pumping channel and a water pumping channel; the oil liquid pumping channel communicates with the oil liquid channel; the water pumping channel communicates with the water channel; and the oil and water separated mining pump sucks oil liquid and water onto the ground through the oil liquid pumping channel and the water pumping channel correspondingly. The hollow oil pumping rod is used for driving the oil and water separating pump to make vertical stroke action, and thus separation and pumping of the oil liquid and the water are completed. According to the oil and water separatedmining device, the effects that as for the heavy oil well, the doped thin oil amount is decreased or the doped chemical viscosity reducer dosage is decreased can be achieved, and meanwhile the energyconsumption lowering effect is achieved; and the heavy oil well achieves the effects that the treating dosage is decreased and energy consumption is lowered, thus the production cost is lowered, andproduction benefits are increased.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to an oil-water recovery device for a water-bearing oil well and an oil-water recovery method for a water-bearing oil well. Background technique [0002] In the prior art, with the development of the oil field, the water cut rises, and the oil well stops spraying, and the rod pump mechanical oil recovery method is mainly used for production, and the oil and water are mixed and produced at the same time, and enter the combined station processing system together. [0003] However, water content has a great impact on oil production: ①The production of heavy oil wells mainly involves mixing thin oil from the annulus, mixing with heavy oil downhole to reduce viscosity, and then extracting the ground through oil pumps. After the oil well contains water, since water also occupies thin oil, As a result, the amount of thin oil occupied per unit of heavy oil production increa...

AI Technical Summary

Problems solved by technology

[0003] However, water content has a great impact on oil production: ①The production of heavy oil wells mainly involves mixing thin oil from the annulus, mixing with heavy oil downhole to reduce viscosity, and then extracting the ground through oil pumps. After the oil well contains water, since water also occupies thin oil, As a result, the amount of thin oil occupied per unit of heavy oil production increases, and the higher the water content, the greater the value of thin oil occupied per unit of heavy oil production, and the price of thin oil is greater than the price of blended oil, resulting in a decline in economic benefits

At the same time, since the produced water and crude oil are stirred by the pump and sucker rod during the production process, the oil-water emulsification is serious, and the load of the pumping unit becomes larger. After entering the treatment system, the amount of demulsifier is increased, and the energy consumption of the combined station is increased;② When thin oil wells are exploited with oil rod pumps, the oil-water emulsification is promoted due to the agitation of the produced water and crude oil through the pump and sucker rods, resulting in serious oil-water emulsification, and the load of the pumping unit becomes larger. After entering the treatment system, the amount of demulsifier is increased. At the same time Increase the energy consumption of joint station processing

Images