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A PROCESS AND A FORMULATION TO INHIBIT SCALE IN OIL FIELD PRODUCTION
A PROCESS AND A FORMULATION TO INHIBIT SCALE IN OIL FIELD PRODUCTION
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机译:油田生产中抑制规模的过程和公式
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摘要
This invention is a process for minimising the squeezing and shut-in operations needed to inhibit scale in a production well using the precipitation squeeze method by injecting into an oil-bearing rock formation a water-miscible formulation comprising: (a) a water-miscible surfactant which is in liquid form, (b) a solution of a water-soluble metal salt comprising a multivalent cation and (c) a solution of water-miscible scale-inhibiting compound comprising an anionic component capable of forming a scale inhibiting precipitate in situ in the presence of the cations in (b) upon injection into in the rock formation, wherein the surfactant is a glycol ether and the minimum ion concentration of the scale inhibiting compound (c) is 5000 ppm based on the total weight of the formulation.
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