Method for improving oil recovery ratio through continuous-phase composite oil displacement
The invention provides a method for improving oil recovery ratio through continuous-phase composite oil displacement. The method includes the steps of firstly, injecting weak gel solution into an oilreservoir through a water injection well to improve the oil-water fluidity ratio of the oil reservoir...
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| creator | HE JIBO LI ZHIPENG ZHANG XIANGCHUN XING ZHIHUI ZHANG XIN GU ZHONGBO ZHANG GUOHUA |
| description | The invention provides a method for improving oil recovery ratio through continuous-phase composite oil displacement. The method includes the steps of firstly, injecting weak gel solution into an oilreservoir through a water injection well to improve the oil-water fluidity ratio of the oil reservoir, plugging a high-permeability reservoir, and enabling oil in the reservoir to flow to a productionwell to be collected; and secondly, after a cross-linked polymer is injected, surfactant solution is injected into the same water injection well to reduce oil-water interfacial tension, the oil and the water are separated, and the oil enters the production well to be collected. The method for improving the oil recovery ratio through continuous-phase composite oil displacement can increase the viscosity of the water, reduce the water-oil fluidity ratio, adjust the water absorption profile of a stratum, reduce the oil-water interfacial tension, improve the edge wettability and reduce the pressure of the water injection |
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The method includes the steps of firstly, injecting weak gel solution into an oilreservoir through a water injection well to improve the oil-water fluidity ratio of the oil reservoir, plugging a high-permeability reservoir, and enabling oil in the reservoir to flow to a productionwell to be collected; and secondly, after a cross-linked polymer is injected, surfactant solution is injected into the same water injection well to reduce oil-water interfacial tension, the oil and the water are separated, and the oil enters the production well to be collected. The method for improving the oil recovery ratio through continuous-phase composite oil displacement can increase the viscosity of the water, reduce the water-oil fluidity ratio, adjust the water absorption profile of a stratum, reduce the oil-water interfacial tension, improve the edge wettability and reduce the pressure of the water injection</description><language>chi ; eng</language><subject>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</subject><creationdate>2021</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20210326&DB=EPODOC&CC=CN&NR=112554855A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,309,781,886,25568,76551</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20210326&DB=EPODOC&CC=CN&NR=112554855A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>HE JIBO</creatorcontrib><creatorcontrib>LI ZHIPENG</creatorcontrib><creatorcontrib>ZHANG XIANGCHUN</creatorcontrib><creatorcontrib>XING ZHIHUI</creatorcontrib><creatorcontrib>ZHANG XIN</creatorcontrib><creatorcontrib>GU ZHONGBO</creatorcontrib><creatorcontrib>ZHANG GUOHUA</creatorcontrib><title>Method for improving oil recovery ratio through continuous-phase composite oil displacement</title><description>The invention provides a method for improving oil recovery ratio through continuous-phase composite oil displacement. 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| language | chi ; eng |
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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 | Method for improving oil recovery ratio through continuous-phase composite oil displacement |
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