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Method of dissolving organic filter cake obtained from polysaccharide based fluids used in production operations and completions of oil and gas wells
Method of dissolving organic filter cake obtained from polysaccharide based fluids used in production operations and completions of oil and gas wells
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机译:溶解由用于生产操作和油气井完井的多糖基流体获得的有机滤饼的方法
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摘要
The invention shows a method of degrading damaging material within a subterranean formation of a well bore using an enzyme treatment. Filter cakes and very viscous fluids are such damaging materials. The enzyme treatment degrades polysaccharide-containing filter cakes and damaging fluids which reduces their viscosity. The degraded filter cake and damaging fluid can then be removed from the formation back to the well surface. The particular enzymes utilized are specific to a particular type of polysaccharide and are active at low to moderate temperatures. The enzymes attack only specific linkages in filter cakes and damaging fluids and are active in the pH range of about 2.0 to 10.0.
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