Nano treatment liquid for increasing yield and injection of oil-water wells

Abstract

The invention discloses a nano treatment liquid for increasing the yield and injection of oil-water wells. The nano treatment liquid comprises the following raw materials by weight: ammonium chloride, a water-soluble demulsifier, methanol, sodium hexametaphosphate, hydrochloric acid, polymaleic acid, ethylenediamine tetramethylene phosphate, hydrofluoric acid, a corrosion inhibitor mud acid, a cleanup additive, an assistant, sodium dodecyl benzene sulfonate, a chelating agent, sodium diethylene triamine pentacetate, methyl sulfonic acid, and a surfactant. The surfactant comprises the following raw materials by weight: nano silica, zeolite, sodium carbonate, an anionic surfactant and sodium silicate; the assistant is fatty alcohol, fatty amine or triethanolamine. The nano treatment liquid provided by the invention can effectively relieve the technical problems of complex pollution blockage damage in low permeability, ultra-low permeability and other hard-to-produce oil reservoirs, improves the oil layer liquid phase seepage environment, realizes oil well blockage relieving and yield increase, water well decompression and augmented injection, enhances ultra-low permeability oil reservoir waterflood sweep efficiency and oil displacement efficiency, and improves the crude oil recovery.

Description

technical field [0001] The invention relates to the technical field of oil-water well injection enhancement, in particular to a nano-treatment liquid for oil-water well injection enhancement. Background technique [0002] In the process of oil field drilling, downhole operation, water injection development and tertiary oil recovery, due to the incompatibility of various entering fluids with reservoir rock minerals and reservoir fluids, the existence of oil, suspended solids and microbial metabolites in the water, the oil wells and injection The formation of water wells will cause serious blockage damage, resulting in increased water injection pressure, decreased water absorption index, reduced oil well production, affecting oil displacement effects, and even causing production wells to be scrapped. [0003] After a long period of water injection in the oil field, due to the complexity and heterogeneity of the formation, all kinds of oil reservoirs will cause interlayers and ...

AI Technical Summary

Problems solved by technology

Practice has shown that in the application of traditional acidizing technology in low permeability oilfields, due to factors such as fast acid-rock reaction speed, small acid penetration distance, short validity period after acidizing, and incompatibility of acid-rock, new sedimentary plugs are often formed, resulting in the success of the measures. The rate is low, or even ineffective, or the water well cannot be injected, and the production of the oil well is reduced.

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