欢迎来到天天文库
浏览记录
ID:21570205
大小:355.91 KB
页数:9页
时间:2018-10-23
《大庆油田-杏北油田三元复合驱油技术挖潜效果及认识》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、杏北油田三元复合驱油技术挖潜效果及认识房宝财刘新仓徐典平牛井岗李世勇张庆权(大庆油田有限责任公司第四采油厂)摘要:杏树岗汕田北部开发区(简称杏北)位于大庆汕田长垣中部,与大庆油田北部相比,储层沉积类型由辫状河道砂过渡到分流平原河道砂,油层分布相对稳定,渗透率级差小,原油粘度低,储层呈较弱的偏亲油性,由于这些差异,油层水驱开发效果好于北1部。为了探索水驱后进-步提高采收率的方法,先后在该区开展了三元复合驱先导性、扩大性及工业性矿场试验,为三元复合驱油技术在杏北开发区的推广应用提供丫实践依据。开展的三项三元复合驱汕矿场试验,针对杏北
2、主力油层,均采用五点法而积并网,但在试验层位、井距及注入体系配方等7/面冇所不同:试验层位由单层到多层;注采井距由141m到250m:在注入体系配方及段塞组合方而,后两个试验应用优化的注入段塞,且工业性试验注入体系中的表而活性剂由具有自主知识产权的国产表活剂替代了进口的同类产品。由丁•这些差异,三个试验的注采动态变化不同,但均取得丫较好的驱油效果,取得;f以下认识:一是ASP体系扩大了波及体积,提高丫驱油效率,先导性试验与扩大性试验与水驱相比,提髙原汕采收率20%OOIP左右;二足汕井见效状况与井M对汕层的控制程度密切相災,主力
3、油层控制程度在50%以上效果相对较好;三是应用三元复合驱油技术,在200m及以上注采井距条件下注采系统结垢明显,且工业性试验独立的采出液处理系统在见到三元体系处理困难,采取措施后取得了初少效果。UnderstandingandPotentialityofASPTechnologyinXingbeiOilFieldFangBaocai,LiuXincang,XuDianping,NiuJinggang,LiShiyong,ZhangQinquan(No.4OilProductionCompanyofDaqingOilfieldCo
4、mpanyLtd)Abstract:ThenortherndevelopmentareaofXingshugangOilField(shortas:Xingbei)islocatedinthemiddleofDaqingPlacanticline.ComparingwiththenorthernpartofDaqing,ithasthefollowingcharacteristics:Depositpatternoftheoilreservoirchangedfrombraidedchanneltodistributarycha
5、nnel;Oillayersarerelativelystable;permeabilitydifferentialisabout5andcrudeoilviscosityisbetween5and10mpa•swhicharcalllowerthanthoseofthenorthernpart.Theoilreservoirisweakoil-wet.Becauseofthesecharacteristics,waterfloodingresultisbetterthanthatofthenorthernpart.Inorde
6、rtofurthersearchenhancedoilrecoverymethods,anAlkaline/Surfactant/Polymer(ASP)pilottest,anenlargedcommercialfieldtestandacommercialfieldtesthavebeencarriedoutsuccessivelywhichprovidebasisforpopularizationofASPfloodinginXingbeiDevelopmentarea.ThreeASPfloodingfieldtests
7、herealladoptedfive-spotpattern,buttheydifferinhorizon,wellspacingandinjectedsystemformula:Testlayerschangedfromsinglelayerstomulti-layers;injectedwellspacingfrom141mto250m;asforinjectedformulaandslugscombinations,thelattertwotestsadoptedoptimuminjectedslugs,andsurfac
8、tantisdomestic,thesamekindastheimported.Becauseofthesedifferences,injectedandproduceddynamicchangesofthethreetestsarcdifferent,buta
此文档下载收益归作者所有