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METHOD OF TREATING SHALE AND CLAY IN HYDROCARBON FORMATION DRILLING
METHOD OF TREATING SHALE AND CLAY IN HYDROCARBON FORMATION DRILLING
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机译:油气层钻井泥页岩和泥浆的处理方法
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摘要
Swelling and migration of subterranean clay is inhibited during drilling for and stimulation of the production of hydrocarbon fluids, and preparation therefor, by treating said formations with a copolymer of about 5 % to about 50 % of an anionic monomer such as acrylic acid, methacrylic acid, or 2-acrylamido-2-methyl propane sulfonic acid and the balance a cationic monomer selected from dimethyl diallyl ammonium chloride, or acryloxy or methacryloxy ethyl, propyl or 3-methyl butyl trimetyl ammonium chlorides or methosulfates. Permeability damage to the formation is reduced in the presence of the copolymer; it is particularly effective in spite of the presence of a foaming agent.
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