聚合物驱在渤海油田的应用C+E.doc

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1、ApplicationofEORTechnologybyMeansofPolymerFloodinginBohaiOilFields在渤海油田以聚合物驱提高采收率技术的应用AbstractEnhancedoilrecoverybymeansofpolymerfloodingisconsideredasanimportanttechnologyforthestrategicdevelopmentofoffshoreoilfieldsinChina.Theimplementationofpolymerfloodingi

2、ntheoffshoreoilfieldsrequiresovercomingseveralmajortechnicalproblemscausedlargelybytheabsenceofafreshwatersourceandlimitedspaceontheplatform.ApilottestofpolymerfloodingwasconductedinSZ36-1OilfieldlocatedinBohaiBay,China.Theproblemsmentionedaboveweresolvedthrou

3、ghthedevelopmentof(1)ahydrophobicallyassociatingpolymertoleranttosaltsinthebrineandproducedwaterand(2)aportableautomaticinjectionunit.Thesignificantincrementaloilanddecrementofwatercutwereobservedafter8monthsofpolymerinjection.Thesuccessfulimplementationofpoly

4、merfloodingmakesthreebreakthroughs:(1)thefirstpolymerfloodingpilottestinoffshoreoilfieldsinChina;(2)initialapplicationofahydrophobicallyassociatingpolymerasthedrivingagentinthefield;(3)significantincrementofoilinthetrailofasinglewellinjectionofpolymer.Thepract

5、iceillustratesthefeasibilityofpolymerfloodingundercurrentproductionconditionsofoffshoreoilfieldsthatleadtoapplicationsinalargerscale.摘要对中国近海油田发展战略而言，以聚合物驱提高原油采收率技术被视为一个重要的技术。在海上油田实施聚合物驱需要克服几个主要技术问题，主要是由于缺乏新鲜水资源和平台上有限的空间。在位于中国渤海湾的SZ36-1油田进行了聚合物驱试点测试。通过（1）疏水缔合聚合

6、物在盐水中的耐盐性和产出水和（2）便携式自动注射装置的发展，解决上述问题。聚合物注入8个月后，观察到了显着的增油和含水率的降低。聚合物驱的成功实施，成就三个突破：（1）首次在中国海上油田聚合物驱油试点测试;（2）疏水缔合聚合物作为驱油剂在该油田初次应用：（3）在单井注入聚合物后跟踪，明显的石油增量。实践证明了当前的海上油田生产条件下的可行性，这将导致大范围应用。IntroductionThereareabout20offshoreoilfieldsinBohaiBay,whicharereferredtoBohai

7、Oilfields[1],inwhich70%crudeoilwithviscosityrangedfrom50mPa·sto150mPa·s.WaterfloodingisthedominanttechniqueforthedevelopmentofviscousoilinBohaiBay.Theproblemisthattheoilrecoverybywaterfloodingisquitelow18~20%comparedtotheaverageoilrecoveryof32%inonshoreoilfiel

8、ds.Thereasonslieinthehighviscosityoftheoil,thickpayzoneswithhighheterogeneity,aswellasthepresentoffshoreoildevelopmentmode:theoilisproducednormallyinaninverted9-spotfloodpatternwit