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时间:2020-06-01
《苏里格气田苏77区块特低渗储层成岩相识别及分布规律研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第36卷第3期石油窈劈沾届Vo1.36.No.32014年5月PETRoLEUMGEoLoGY&EXPERIMENTMay,2014文章编号:1001—6112(2014)03-0291-08doi:10.11781/sysydz201403291苏里格气田苏77区块特低渗储层成岩相识别及分布规律研究宫雪,沈武显,李文厚,王若谷(1.西北大学地质学系大陆动力学国家重点实验室,西安710069;2.西安石油大学地球科学与工程学院,西安710065)摘要:苏里格气田苏77区块中二叠统石盒子组盒_F亚段沉积时期辫状河道发育,储层岩性以岩屑石英砂岩、岩屑砂岩为主。储层经历了压实、压溶、
2、自生矿物胶结以及后期溶蚀作用,大部分已进入中成岩B期,达到低孑L一特低渗储层级别。根据主要的成岩矿物、填隙物、成岩作用及孑L隙组合,将盒。下亚段储层按照储集性能的优劣划分为石英加大溶孔相(I)、黏土矿物充填晶间孑L相(Ⅱ)、碳酸盐矿物胶结相(Ⅲ)和压实压溶致密相(Ⅳ)4类成岩相带。其中I类成岩相为有利储集相,Ⅱ类成岩相储集性能次之,Ⅲ、Ⅳ类成岩相属于较差储集岩相。根据不同成岩相的测井响应特征可以识别出成岩相的同心、侧变和互层三类组合模式。关键词:伊利石化;成岩相;特低渗储层;组合模式;苏77区块;苏里格气田中图分类号:TEl22.2文献标识码:ADiageneticfacies
3、identificationanddistributionstudyofultra—lowpermeabilityreservoirinSu77blockofSuligeGasFieldGongXue,ShenWuxian,LiWenhou,WangRuogu(1
4、StateKeyLaboratoryofContinentalDynamics,DepartmentofGeology,NorthwestUniversity,Xi’an,Shaanxi710069,China;2.SchoolofEarthSciencesandEngineering,Xi"anShiyouUniv
5、ersity,Xi’an,Shaanxi710065,China)Abstract:Braidedchannelsdevelopedwellinthelowerpart0{the8thmemberofmiddlePermianShiheziFor—marioninSu77blockofSuligeGasField.Lithicquartzsandstoneandlithicsandstonearethemainlithologyofreservoir.Aftercompaction,pressuresolution,authigenicmineralcementationand
6、laterdissolution,mostofre—servoirsthatarelowporosityandultra—lowpermeabilityoneshaveenteredmiddlediageneticstageB.Accordingtothemaindiageneticminerals,fillings,diagenesisandporecombination,reservoirsofthelowerpartofthe8thmemberofmiddlePermianShiheziFormationaredividedinto4diageneticfaciesasf
7、ollowed:I.quartzover-growthanddissolvedporefacies;Ⅱ.claymineralsfillingandintergranularporefacies;11.carbonatemineralscementationfacies:1V.compactionandpressuredissolutiondensefacies.FaciesIarethebestreservoirsandfaciesIIaresecond—bestones.Facies111andIVarepoorreservoirs.Accordingtologgingfa
8、cies,diageneticfaci—esarecombinedasconcentricpattern.1ateralvariationpatternandcross.1ayerpattern.Keywords:illitization;diageneticfacies;ultra—lowpermeabilityreservoir;combinationpattern;Su77block;SuligeGasField苏77区块上古生界盒段储层岩性致密,具呈Ⅱ期加大,起到了很好的抗压实作用:
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