中高渗砂岩油藏水驱后储层参数变化规律.pdf

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1、2012年12月大庆石油地质与开发Dec．．2012第31卷第6期PetroleumGeologyandOilfieldDevelopmentinDaqingV01．31No．6DOI：10．3969／J．ISSN．1000—3754．2012．06．012中高渗砂岩油藏水驱后储层参数变化规律杨满平张淑婷刘继霞孙长红于成杰(1．燕山大学石油工程系，河北秦皇岛066004；2．华北油田分公司第二采油厂地质研究所，河北霸州065700)摘要：通过对岔河集油田取心井岩心的分析，发现水驱对中高渗砂岩油藏储层参

2、数有显著影响：孔隙度和渗透率的值随水驱倍数增加而增大，孑L隙度变化幅度较小，渗透率增幅比较明显；初始孔隙度和渗透率值越高的样品，水驱后增幅越明显，这反映注入水沿着大孔道推进，对大孔道的影响最大；水驱后，储层出现面孔率和孑L隙体积增大、喉道直径增大、泥质等填隙物含量降低、排驱压力和饱和度中值压力降低等变化特征；由于水驱后渗流能力增强的大孑L道容易在地层中形成优势渗流通道，注入水沿优势通道推进，影响注入水的波及体积和驱油效率。因此，需要采取深部调驱等措施，封堵已经形成的优势渗流通道，提高注水开发效果。关键

3、词：砂岩油藏；水驱；储层参数；孔隙度；渗透率；孔隙结构中图分类号：TE375．6文献标识码：A文章编号：1000—3754(2012)06—0059-05CHANGEDLAWSoFPARAMETERSAFTERWATERFLooDINGFORMEDIUM．HIGH．PERMEABILITYSANDSToNEOILRESERVoIRSYANGManping，ZHANGShuting，LIUJixia。SUNChanghong，YUChengjie(1．PetroleumEngineeringDepart

4、mentofYanshanUniversity，Qinhuangdao066004，China，I2．GeologicalInstituteofNo．2OilProductionPlantofHuabeiOilfieldBranchCompany。Bazhou065700，China)Abstract：ThroughthecoreanalysesinChahejiOilfield，theparametersaresignificantlyinfluencedbythewaterfloodingform

5、edium—high—permeabilitysandstonereservoirs：theporosityandpermeabilityvaluesincreasewiththemultiplesofthewaterflooding，buttheformerchangesalittle，andthelatterisonthecontrary；thelargerprimaryvaluesare，themoreobviouslyincreasedaftertheflooding，thisconditio

6、nsreflectthattheinjectedwaterdrivesfor—wardalonghigh-capacityporesandchannels，thustheinfluenceonthechannelsarethemostobvious；aftertheflooding，thefollowingschangedareshown：theincreasesofsurfaceporeratio，porevolumeandthroatradiusandfurthermorethedecreases

7、oftheshaleandothermatricescontents，drainagepressureandsaturationmedianpres-sure；duetotheenhancementoftheflowabilityaftertherflooding，thehigh—capacitychannelsarepronetoresultinpredominantfilteringchannels，thusthewatercaneasilyadvancealongthechannels，andt

8、hesweptvolumeandoilfloodedeficiencyarefinallyinfluenced．Thereforeitisnecessarytotaketechnicalmeasuresofdeepprofilecon-trolandSOontoblockthegeneratedpreferentialchannelsandimprovetheeffectsofthewaterflooding．Keywords：sandstoneoilr