Preparation method and application of decompression and augmented injection agent for water injection well

The invention provides a preparation method and application of a decompression and augmented injection agent for a water injection well. The decompression and augmented injection agent comprises the following components: 2-5% of an organic matter degradation agent, 10-15% of a chelating agent, 0.5%...

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Hauptverfasser: HE JING, WANG MANXUE
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creator HE JING
WANG MANXUE
description The invention provides a preparation method and application of a decompression and augmented injection agent for a water injection well. The decompression and augmented injection agent comprises the following components: 2-5% of an organic matter degradation agent, 10-15% of a chelating agent, 0.5% of a scale inhibitor, 0.5% of a composite surfactant and the balance of water. The invention further relates to application of the decompression and augmented injection agent for a water injection well. According to the invention, the chelate is subjected to complex reaction with inorganic scales in a water injection string, a near-well bore zone and a deep reservoir, so that the inorganic scales are converted into soluble complexes; the vegetable gum and the polymer residues are degraded by using an organic blocking remover; a composite surfactant with ultra-low interfacial tension is used for stripping residual oil on the surface of stratum rock, and finally plug removal and oil displacement of immediate vicinity
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subjects ADHESIVES
CHEMISTRY
DYES
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MINING
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
PAINTS
POLISHES
title Preparation method and application of decompression and augmented injection agent for water injection well
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