W低阻油藏高不动水饱和度的成因及对低阻油层的影响.pdf

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1、第32卷第4期石油察劈弛质Vo1．32．NO．42010年8月PETR0LEUMGEoL0GY&EXPERIMENTAug．，2010文章编号：10016112(2010)04—0353—05W低阻油藏高不动水饱和度的成因及对低阻油层的影响廖明光，唐洪，苏崇华，姜巍。(1．西南石油大学，成都610500；2．中海石油有限公司湛江分公司研究院，广东湛江524057；3．中石油川庆钻探公司地质勘探开发研究院，成都610051)摘要：W油藏z1油组为高孔低渗低阻油藏，低阻油层的地质成因复杂多样。该文针对z油组的储层发

2、育特征，统计了储层的不动水饱和度，分析了低阻层段z1油组的高不动水饱和度的成因，以及不动水饱和度与油层电阻率的关系。通过研究发现，形成低阻层段z1油组高不动水饱和度主要原因是储层细颗粒含量高，储层孔隙结构差、细微孔喉体积百分数高，以及岩石的亲水性。地层电阻率随着不动水饱和度的增高而降低。因此，高不动水饱和度是影响w油藏z1油组低阻的重要原因之一。关键词：粒度分析；吸附水作用；孔隙结构；不动水饱和度；低电阻率油层；低阻成因中图分类号：TE3l1文献标识码：AGENESISOFHIGHIMMoBILEWATERSA

3、TURATIoNINTHEWLoWRESISTIVITYRESERVOIRSANDITSINFLUENCEoNTHELoWRESISTIVITYRESERVOIRLiaoMingguang，TangHong，SuChonghua，JiangWei。(1．SouthwestPetroleumUniversity，Chengdu，Sichuan610500，China；2．ResearchInstituteofExplorationandDepartment，CNOOCZhanjiangCompany，Zhanji

4、ang，Guangdong524057，China；3．ResearchInstituteofExplorationandDepartment，ChuanqingDrilling&ExplorationCompany，CNPC，Chengdu，Sichuan610051，(ina)Abstract：ThereservoirofZ1oilgroupinWOilfieldhaslowresistance，highporosityandlowpermeability．Thelowresistivityoftheres

5、ervoirwascausedbymanygeologicalreasons．Inthispaper，forthereservoircharacteristicsofZoilgroup。statisticsofthereservoirofimmobilewatersaturationhasbeendone，andthegenesisofhighimmobilewatersaturationintheZ1oilgroupintheWLowresistivityreservoirs，aswellastherelat

6、ionshipbetweentheimmobilewatersaturationandreservoirresistivityhasalsobeenstudied．Throughthestudy，inlowresistivitylayersegmentofZ1oilgroup，itisfoundthatthemainreasonsformingahighlyimmobilewatersaturationarehighlevelsoffineparticlesofthereservoir，Poorporestru

7、ctureofreservoir，Slightlyhigherpercentageoffineporeandthroatvolume，andtherockhy—drophilic．Theformationresistivityincreasesasimmobilewatersaturationdecreases．Therefore，highimmobilewatersaturationisoneoftheimportantreasonsaffectingthelOWresistivityoftheZ1oilgr

8、oupintheWoi1reservoir．Keywords：particlesizeanalysis；roleofwater—absorbing；porestructure；immobilewatersaturation；lowresistivityreservoir；genesisoflowresistivityformation所谓的低阻油层。主要是指油层的电阻率低阻油气藏在我国