Selective water plugging method of oil well in oil extraction process
The invention discloses a selective water plugging method of oil well in the oil extraction process. The selective water plugging method comprises the steps that A, first carrier fluid and pretreatment solution are mixed, and pretreatment mixture solution is obtained, the pretreated mixture solution...
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| creator | QU XIAOQUAN ZHANG XIUMING GUAN YANPING WANG XIAO DONG QIANG JIAO HONGYAO ZHANG HUILI LIU MINGNONG YANG ZHIQIANG ZHANG WEI WANG CHUNNA |
| description | The invention discloses a selective water plugging method of oil well in the oil extraction process. The selective water plugging method comprises the steps that A, first carrier fluid and pretreatment solution are mixed, and pretreatment mixture solution is obtained, the pretreated mixture solution is injected in an oil well; B, second carrier fluid and first water plugging agent are mixed, and first water plugging agent mixture solution is obtained, the first water plugging agent mixture solution is injected in the oil well, the well is closed for 5-8 hours, and 24 hour oil extraction operation is recovered; C, third carrier fluid and second water plugging agent are mixed, and second water plugging agent mixture solution is obtained, the second water plugging agent mixture solution is injected in the oil well, the well is closed for 8-12 hours, the water plugging operation is completed, and oil extraction operation is started normally. The shortcoming of the existing technology is overcome by adopting the s |
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The selective water plugging method comprises the steps that A, first carrier fluid and pretreatment solution are mixed, and pretreatment mixture solution is obtained, the pretreated mixture solution is injected in an oil well; B, second carrier fluid and first water plugging agent are mixed, and first water plugging agent mixture solution is obtained, the first water plugging agent mixture solution is injected in the oil well, the well is closed for 5-8 hours, and 24 hour oil extraction operation is recovered; C, third carrier fluid and second water plugging agent are mixed, and second water plugging agent mixture solution is obtained, the second water plugging agent mixture solution is injected in the oil well, the well is closed for 8-12 hours, the water plugging operation is completed, and oil extraction operation is started normally. 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The selective water plugging method comprises the steps that A, first carrier fluid and pretreatment solution are mixed, and pretreatment mixture solution is obtained, the pretreated mixture solution is injected in an oil well; B, second carrier fluid and first water plugging agent are mixed, and first water plugging agent mixture solution is obtained, the first water plugging agent mixture solution is injected in the oil well, the well is closed for 5-8 hours, and 24 hour oil extraction operation is recovered; C, third carrier fluid and second water plugging agent are mixed, and second water plugging agent mixture solution is obtained, the second water plugging agent mixture solution is injected in the oil well, the well is closed for 8-12 hours, the water plugging operation is completed, and oil extraction operation is started normally. The shortcoming of the existing technology is overcome by adopting the s</abstract><oa>free_for_read</oa></addata></record> |
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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 | Selective water plugging method of oil well in oil extraction process |
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