Pressure reducing and injection increasing agent containing lipopeptide biological enzyme

Abstract

The invention discloses a pressure reducing and injection increasing agent containing a lipopeptide biological enzyme, and the agent is applied to the treatment of formation injection water of oil field. The pressure reducing and injection increasing agent comprises the following components in percentage by weight: 65-68% of a lipopeptide biosurfactant, 4.5-4.75% of N-sodium lauroyl sarcosinate, 5.25-5.5% of N-dodecyl alanine, 0.005-0.0055% of fluorocarbon surfactant FN-2, 0.01-0.015% of vitamin D, and the balance amphoteric surfactant NAP, wherein the sum of the weight percentage of all the components is one hundred percent. The pressure reducing and injection increasing agent of the invention has the beneficial effects that: by adding the pressure reducing and injection increasing agent of the invention in a dosage of 0.3-0.5% into formation injection water, and injecting the water into a well by a high-pressure plunger pump, a well head pressure of the water injection well decreases by 2-3.5 Mpa, and a water injection rate increases by 5-8 percent.

Description

technical field [0001] The invention relates to the technical field of water injection and oil production in oilfields, in particular to a treatment agent for formation injection water, which is a pressure-reducing and injection-increasing agent containing lipopeptide biological enzymes. Background technique [0002] At present, my country has proven low-permeability oilfield geological reserves of 50×10 8 t, most oilfields have low permeability (0.3×10 -3 ~25×10 -3 μm 2 ). The porosity is small (5-20%), the injected water quality is poor, the sulfur mineralization is high (1000-25000mg / L), and the total calcium and magnesium ions are 250-2000mg / L. After this type of reservoir is put into development, the water injection pressure is high, and the secondary pollution of the water quality further damages the oil layer. The water injection pressure increases with time, resulting in a rapid decrease in the water injection pressure, which cannot be completed normally, and eve...

AI Technical Summary

Problems solved by technology

After this type of reservoir is put into development, the water injection pressure is high, and the secondary pollution of the water quality further damages the oil layer. The water injection pressure increases with time, resulting in a rapid decrease in the water injection pressure, and the injection cannot be completed normally, and even the oil production rate of the oil field is reduced.