System for rapidly dispersing and diluting powder polymer in offshore or alpine or fault-block oil field

Abstract

The invention belongs to the technical field of polymer injection of an oil field. In order to solve the problem that currently, rapid dispersion and injection of powder polymer in water and the system operation are influenced a lot by the outside environment, the invention discloses a system for rapidly dispersing and diluting the powder polymer in an offshore or alpine or fault-block oil field, which comprises a water supply tank, a dry powder tank and a buffer tank. The water supply tank, the dry powder tank and the buffer tank are all connected with a nitrogen source; the dry powder tank is sequentially connected with a feeder, a buffer container, a negative pressure jet device and the buffer tank; the water supply tank is sequentially connected with a water supply pump and the negative pressure jet device; the water supply tank is also connected with a diluting water pump; the buffer tank is further connected with a mother liquid conveying pump; an outlet of the mother liquid conveying pump is connected with an outlet of the diluting water pump. The system disclosed by the invention is compact in structure and convenient to move; the integral system is in the protection of nitrogen, so that the influence of the outside environment can be avoided and oxygen in the air is prevented from degrading the viscosity of target liquid to influence oil productivity.

Description

technical field [0001] The invention belongs to the technical field of polymer injection in oilfields, and in particular relates to a rapid dispersion and dilution system for powdery polymers in offshore or alpine or fault-block oilfields. Background technique [0002] Primary oil recovery refers to the method of oil field exploitation relying on the natural energy of the reservoir, and secondary oil recovery refers to the production method through water injection and gas injection, which is a method of maintaining and supplementing the energy of the oil reservoir. After secondary oil recovery, there are still 60%-70% of the crude oil remains in the ground and is difficult to extract. In order to economically and effectively exploit the remaining oil in the formation and improve the oil recovery rate, tertiary oil recovery technology is required. Polymer flooding is a kind of tertiary oil recovery technology, which refers to dispersing water-soluble polymers (such as powdery...

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Problems solved by technology

[0004] However, the current system for dispersing the powdery polymer into the injection water is greatly affected by the external environment. For example, the air blower 4 will blow the outside air into the system, and the moisture in the outside air will cause the polymer to absorb moisture and unite, resulting in The impact of feeding, in addition, the entry of oxygen will degrade the viscosity of the target liquid and affect the oil recovery

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