Double-reinforcing oil production method alternately adopting fungus extracellular enzyme and microorganisms

Abstract

The invention belongs to the technical field of microorganism reinforcing oil production and particularly discloses a double-reinforcing oil production method alternately adopting fungus extracellular enzyme and microorganisms. Displacing fluid is involved, and the displacing fluid comprises enzyme fluid of the fungus extracellular enzyme and bacterial fermentation fluid of the microorganisms. The double-reinforcing oil production method specifically comprises the steps that the enzyme fluid of the fungus extracellular enzyme and the bacterial fermentation fluid of the microorganisms are adopted to conduct alternate oil displacing, and the strong degrading function of the fungus extracellular enzyme on macromolecule components in crude oil is combined with the functions such as the degrading function and the strong surface active substance synthetic function of oil displacing bacteria and the acid and gas production function of the bacteria; and enzymic reinforcing oil production and microorganism reinforcing oil production are alternately conducted to prevent the degrading effect of the oil displacing bacteria on the fungus extracellular enzyme when enzymic reinforcing oil production and microorganism reinforcing oil production are simultaneously conducted. The oil displacing rate of the double reinforcing oil production method is far larger than that of a traditional water displacing method, and the double-reinforcing oil production method has extremely remarkable economic benefits.

Description

Technical field [0001] The invention relates to the technical field of microbial enhanced oil recovery, in particular to a dual enhanced oil recovery method using fungal extracellular enzymes and microorganisms alternately. Background technique [0002] When the traditional method is used to extract crude oil, as the extraction time increases, the difficulty of oil recovery increases, and the amount of recovery gradually decreases, but about 2 / 3 of the crude oil in the oil-bearing formation is still difficult to recover. Compared with the search for new oil reservoirs, microbial enhanced oil recovery (MEOR), which is low-cost and can effectively increase oil recovery, has attracted widespread attention. MEOR relies on microbial self-reproduction or metabolites to improve oil recovery, low cost and harmless to the environment. [0003] The microorganisms used by MEOR are mainly bacteria, and the mechanism of action is to improve the oil recovery through the direct and indirect effe...

AI Technical Summary

Problems solved by technology

However, the ability of fungi to produce surface active substances is weak, and there are few surface active substances in extracellular enzymes. The addition of extracellular enzymes has little effect on the surface properties, interface properties and emulsification of crude oil, so its oil displacement effect still cannot reach the ideal level.

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