Lipopeptide-containing composite oil displacement agent and use method thereof

Abstract

The invention relates to a lipopeptide-containing composite oil displacement agent and a use method thereof. The use method comprises the steps that S1, a weak base solution is injected into a stirring chamber through a first injection port to be stirred, a first composition formed by petroleum sulfonate and lipopeptide is injected into the stirring chamber through a second injection port to be stirred with the weak base solution to form a second composition, a polymer is injected into the stirring chamber through a third injection port, and the polymer is mixed and stirred with the second composition to form a lipopeptide-containing composite oil displacement agent; S2, a liquid conveying pump is started, the lipopeptide-containing composite oil displacement agent is conveyed to a liquid injection pipe through a detection pipe, a regulating valve is opened by a central control unit, and the lipopeptide-containing composite oil displacement agent is injected into the natural rock core; and S3, the central control unit controls an oil extraction device to extract oil. According to the use method, the central control unit is arranged, the input amount of different materials is controlled by arranging different injection ports according to the real-time viscosity of the formed lipopeptide-containing composite oil displacement agent, and the oil recovery rate is increased by adjusting the conveying pressure of the input pump and the opening area of the liquid injection pipeline adjusting valve.

Description

technical field [0001] The invention relates to the field of oil displacing agents, in particular to a lipopeptide-containing composite oil displacing agent and a use method thereof. Background technique [0002] The development of an oil field is divided into three processes: first, use natural energy such as the elastic energy of the reservoir fluid, the hydraulic pressure of the edge water, the gravity of the crude oil itself, and the gas cap pressure to carry out extraction, which is called primary oil recovery. The recovery rate is about 20% to 30%; second, when the natural energy is gradually consumed and there is no production capacity, measures such as gas injection and water injection are artificially taken to maintain the pressure of the reservoir to continue production, that is, gas flooding and water flooding. Secondary oil recovery, the recovery rate is about 20% to 40%; third, after replenishing the reservoir pressure and still unable to continue the production...

AI Technical Summary

Problems solved by technology

[0004] For this reason, the present invention provides a kind of composite oil displacement agent containing lipopeptide and its use method, can solve the technical problem that can't improve the crude oil recovery rate through the use method of oil displacement agent

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