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《低渗透油层新型降阻剂降压增注技术.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2014年6月大庆石油地质与开发June,2014第33卷第3期PetroleumGeologyandOilfieldDevelopmentinDaqingV01.33No.3DOI:10.3969/J.ISSN.1000—3754.2014.03.023低渗透油层新型降阻剂降压增注技术刘伟杰(大庆油田有限责任公司第一采油厂,黑龙江大庆163001)摘要:受储层物性及开发方式影响,低渗透油藏在注水开发过程中存在压力传递慢、注入压力高、油井产量下降快等问题。目前主要通过酸化等方式降压增注,存在有效期短和对套管损害等
2、缺点。通过开展室内实验,对新型降阻剂进行了筛选,并从润湿性、吸附、黏土膨胀、自发渗吸、阻垢率、抑制细菌、相对渗透性等方面进行了评价。室内实验结果表明,新型降阻剂具有较好的界面张力,很强的抗吸附能力及抑制阳离子交换能力,防膨和黏土稳定性好。矿场试验证明,新型降阻剂注入效果明显,有效地改善了吸水状况,试验井组注入压力下降,注入量增加,对应油井的产量提高,井区地层能量得到恢复。关键词:储层;低渗透油藏;降阻剂;先导性试验;地层能量中图分类号:TE348文献标识码:A文章编号:1000—3754(2014)03—0109
3、—05PRESSURE-DECREASINGANDINJECTIONINCREASINGTECHNIQUEoFNEWANTIFRICTIoNAGENTFoRLoW.PERMEABILITYoILRESERVoIRSLIUWeijie(No.1OilProductionPlantofDaqingOilfieldCompanyLtd.,Daqing163001,China)Abstract:Duetoinfluencesofthephysicalpropertiesanddevelopmentmodesofthere
4、servoirs。therearethefol—lowingproblemssuchaslowerpressuretransmission,higherinjectionpressure,fasterproductiondecline,etc.forthelow-permeabilityoilreservoirsintheprocessofwaterfloodingdevelopment.Atpresent,themainpressure-de—creasingandinjection—increasingmea
5、suresareacidizingandSOon,whilesomedisadvantagesofshorterperiodofvalidity,casingdamageandSOfortharefollowed.Throughtheconductedindoorexperiments,anewtypeofanti—frictionagentisscreenedandevaluatedfromtheaspectsofwettability,adsorption,clayswelling,spontaneousim
6、-bibition,scaleinhibitionrate,bacteriarestraintandrelativepermeability.Theexperimentalresultsshowthatthenewagentischaracterizedbymuchbetterinterracialtension(IFT)-strongeranti-absorptioncapacityandpowertorestrainanionexchangeandmoreoverthemuchbetterswelling-p
7、roofandclay—stabilizingabilities.Thefieldtestprovesthattheinjectioneffectsofthenewagentareobvious,thusthewaterintakenperformancesareeffectivelyimproved:forthetestingwellgroup,theinjectionpressuresarealldecreasedandtheinjectionratesareincreasedaswell;forthecor
8、respondingoilproducers,theoilproductionsareincreasedandfurthermoretheformationenergy收稿日期:2013-07.10改回日期:2013—09-25基金项目:国家自然科学基金(10672187)和中国石油天然气股份公司重点科技攻关项目(06—02A-02-01)。作者简介:刘伟杰,女,1969
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