欢迎来到天天文库
浏览记录
ID:52273560
大小:1.60 MB
页数:7页
时间:2020-03-26
《青西凹陷下白垩统含白云质泥岩与泥质白云岩储集层微观孔喉特征及控制因素.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、矿物岩石地球化学通报·非常规油气资源·BulletinofMineralogy,PetrologyandGeochemistryVo1.34No.1,Jan.,2015青西凹陷下白垩统含白云质泥岩与泥质白云岩储集层微观孔喉特征及控制因素李婷婷,朱如凯,白斌,王崇孝。,李铁峰1.中国石油天然气股份有限公司中国石油勘探开发研究院,北京100083;2.提高石油采收率国家重点实验室,北京100083;3.玉门油田分公司勘探开发研究院,甘肃玉门735200摘要:岩石类型中的孔喉特征对储集层的研究具有重要意义。对青西凹陷下白垩统储集层中
2、的含白云质泥岩和泥质白云岩进行薄片观察、矿物x衍射定量分析、场发射扫描电镜观察、Qemscan系统分析和压汞分析,结果发现,含白云质泥岩中黏土矿物含量高,发育黏土矿物层间孔,含部分黄铁矿晶间孔及微裂缝,粒内孔数量较少,微米级孔隙(孔径10~200m)数量居多;泥质白云岩中自云石含量高,以矿物颗粒粒缘缝、粒间孔、微裂缝及有机质收缩缝为主,偶见有机质溶蚀孔、黄铁矿晶间孔,纳米级孔隙较多,主要为2O~200m。通过两类岩性中孔喉特征差异初步分析,认为矿物组成、压实作用、有机质成熟度是其主要影响因素。关键词:含白云质泥岩;泥质白云岩;
3、孔隙;微裂缝中图分类号:P588.245文章编号:1007.2802(2015)01.0079.07doi:10.3969/j.issn.1007.2802.2015.01.009MicroscopicPore·throatCharacteristicsandControllingFactorsoftheLowerCretaceousDolomite-bearingMudstoneandArgillaceousDolomiteReservoirs,QingxiDepressionLITing-ting,ZHURu.kai',B
4、AIBin。',WANGChong.xiao。,LITie.feng1.ResearchInstituteofPetroleumExploration&Developmerit,PetroChina,Beijing100083,China;2.StateKeyLaboratoryofEnhancedOilRecovery,Beijing100083,China;3.ResearchInstituteofPetroleumExploration&Development,PetroChina,YumenOieldCompany,Y
5、umenGansu735200,ChinaAbstract:Studyonpore—throatcharacteristicsisoneimportantpartofreservoirassessment.Studyingpore-throatfeaturesindifferentlithologieshasgreatsignificanceinreservoirstudy.Onbasisofthin.sectionobservationandX.raydiffractiona.nalysis,field-emissionel
6、ectronmicroscopeobservation,Qemscansystemandmercuryinjectionanalysis,dolomite—bearingmudstoneandargillaceousdolomiteofthelowerCretaceousreservoirintheQingxidepressionwereanalyzed.Theresultsindicatedthatthedolomite-bearingmudstoneconsistshighcontentsofclayminerals,de
7、velopsclay—mineralinterlayeredporesandcontainssomepyriteintercrystallineporesandmicrofractureswithfewintraparticlepores,inwhichmicrometer—scalepores(diameter:10—200Ixm)aredominant.TheArgillaceousdolomitemainlydevelopsgrain-edgefractures,in—terparticlepores,microfrac
8、turesandorganicmattercontractedfractures,occasionallycontainsorganicmatterdissolvedporesandpyriteintercrystallinepores,manyofwhicharenanom
此文档下载收益归作者所有