储层结构非均质性及其在深层油气成藏中的意义

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1、学兔兔www.xuetutu.com中国石油勘探第21卷第1期CHINAPETROLEUMEXPLORATION2016年1月DOI：10．3969l／j．issn．1672—7703．2016．01．003储层结构非均质性及其在深层油气成藏中的意义罗晓容张立宽雷裕红胡才志施辉曹斌风(中国科学院地质与地球物理研究所)摘要：储层孔渗物性的非均质性客观存在，对于地下流体的流动过程影响明显，这不仅对于油气田开发十分重要，在油气运聚成藏研究中也不能忽视。文章讨论一类较为特殊的结构非均质性，即储层中沉积结构的非均质性导致各种致密隔夹层构成某种三维空间结构，阻碍储层

2、中流体的流动，引起埋藏过程中成岩作用、油气运聚成藏及储层致密化过程的强非均质性。模拟分析结果表明这种非均质性会导致油气运移路径和聚集位置的强非均质性。结合岩心观察和油气藏解剖分析，发现准噶尔盆地腹部侏罗系含油储层在埋藏到盆地深层的过程中成岩一成藏作用交替发生，结构非均质性的存在可在深层条件下保持有效储集空间，有利于晚期油气运聚成藏。关键词：盆地深层；砂岩储层；结构非均质性；沉积构造；成岩作用；油气运聚中图分类号：TEl12．23文献标识码：AStructuralheterogeneityofreservoirsanditsimplicationonhyd

3、rocarbonaccumulationindeepzonesLuoXiaorong，ZhangLikuan，LeiYuhong，HuCaizhi，ShiHui，CaoBinfeng(InstituteofGeologyandGeophysics,ChineseAcademyofSciences)Abstract：Porosityandpermeabilityheter0geneitiesofreservoirsarecommongeologicalphenomenathatinfluencesignificantlyfluidflowing．Theya

4、reveryimportantnotonlyforoilandgasproductionbutalsoforoilandgasmigrationandaccumulationresearches．Inthispaper,akindofspecialstructuralheterogeneitywasdiscussed．Owingtotheheterogeneitiesofsedimentarystructuresinreservoirs，acertain3Dspatialstmcmreisformedbyvarioustightintercalation

5、s．Duetotheexistenceofsuch3Dstructures，theflowoffluidsinreservoirisimpeded，diageneticalheterogeneityisinducedduringtheburialhistory,andstrongheterogeneitiesaregeneratedintheprocessofhydrocarbonaccumulationandporosityreduction．Itisshownfromsimulationresultsthatthiskindofstructuralh

6、eterogeneitycanresultinstrongheterogeneityofmigrationpathwaysandaccumulationlocations．Basedoncoreobservationandhydrocarbonreservoirdissectionanalysis，diagenesisandreservoirformationtookplacealternativelywhenJurassicoil-bearingreservoirsinthecentralJunggarBasinwereburiedtothedeepz

7、onesinthebasin．Duetotheexistenceofstructuralheterogeneity,thehigh—qualityreservoirscanbepreservedinthedeepzonesanditisfavorableforthemigrationandaccumulationofoilandgasatthelaterstage．Keywords：deepzone，sandstonereservoir，structuralheterogeneity，sedimentarystructure，diagenesis，hyd

8、rocarbonmigrationandaccumu】ation盆地中沉积地层埋