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1、第32卷第4期石油察劈弛質(zhì)Vo1.32.NO.42010年8月PETR0LEUMGEoL0GY&EXPERIMENTAug.,2010文章編號(hào):10016112(2010)04—0353—05W低阻油藏高不動(dòng)水飽和度的成因及對(duì)低阻油層的影響廖明光,唐洪,蘇崇華,姜巍。(1.西南石油大學(xué),成都610500;2.中海石油有限公司湛江分公司研究院,廣東湛江524057;3.中石油川慶鉆探公司地質(zhì)勘探開發(fā)研究院,成都610051)摘要:W油藏z1油組為高孔低滲低阻油藏,低阻油層的地質(zhì)成因復(fù)雜多樣。該文針對(duì)z油組的儲(chǔ)層發(fā)
2、育特征,統(tǒng)計(jì)了儲(chǔ)層的不動(dòng)水飽和度,分析了低阻層段z1油組的高不動(dòng)水飽和度的成因,以及不動(dòng)水飽和度與油層電阻率的關(guān)系。通過研究發(fā)現(xiàn),形成低阻層段z1油組高不動(dòng)水飽和度主要原因是儲(chǔ)層細(xì)顆粒含量高,儲(chǔ)層孔隙結(jié)構(gòu)差、細(xì)微孔喉體積百分?jǐn)?shù)高,以及巖石的親水性。地層電阻率隨著不動(dòng)水飽和度的增高而降低。因此,高不動(dòng)水飽和度是影響w油藏z1油組低阻的重要原因之一。關(guān)鍵詞:粒度分析;吸附水作用;孔隙結(jié)構(gòu);不動(dòng)水飽和度;低電阻率油層;低阻成因中圖分類號(hào):TE3l1文獻(xiàn)標(biāo)識(shí)碼: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所謂的低阻油層。主要是指油層的電阻率低阻油氣藏在我國