泥岩盖层对各种相态天然气封闭性演化阶段划分及意义

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1、维普资讯http://www.cqvip.com第26卷第3期大庆石油地质与开发P．G．O．D．D．2007年6月·13·文章编号：1000．3754(2007)03-0013-05泥岩盖层对各种相态天然气封闭性演化阶段划分及意义刘纯刚，郭淑梅，徐艳姝，周海超(I．大庆油田有限责任公司勘探开发研究院，黑龙江大庆163712；2．吉林油田测井公司，吉林松原1380003．大庆石油学院地球科学学院，黑龙江大庆163318)摘要：在泥岩盖层对各种相态天然气封闭机理及形成条件研究的基础上，针对不同类型泥岩盖层对各种相态天然气封闭性演化阶段进行了研究。以松辽盆地北部三肇

2、凹陷泉一段、泉二段、登二段和青山口组3套泥岩盖层为例，通过划分其对不同相态天然气封闭性演化阶段，研究其对各种相态天然气的封闭特征；通过其封闭性形成时期与沙河子组一营城组气源岩大量排气期之间的匹配关系，研究了它们在该区天然气聚集与保存中的作用。关键词：泥质岩；盖层；不同相态；天然气；封闭性；演化阶段中图分类号：TEl22．3文献标识码：ADivisionofsealevolutionstagesofshalecaprockstogasineachphaseanditsresearchsignificanceLIUChun．gang，GUOShu．mei，XUYa

3、n．shu，ZHOUHai．chao(1．ExplorationandDevelopmentResearchInstituteofDaqingOilfieldCompanyLtd．，Daqing163712，China；2．LoggingCompanyofJillOilfield。Songyuan138000，China；3．DaqingPetroleumInstitute，Daqing163318，China；)Abstract：Basedonsealmechanismandformationconditionofshalecaprocktogasineac

4、hphase，sealevolutionstagesofdifferentshalecaprocktogasineachphaseisdivided．Itisconsideredthatshalecaprockwhichhasnotabilityofgeneratinghydrocarbonandhasnotabnormalporefluidpressurecansealgasinfreephaseandgasinwater-dissolvingphase，andevolutionofitssealabilityisdividedintotwostages．S

5、halecaprockwhichhasabilityofgeneratinghydrocar—bonandhasnotabnormalporefluidpressurecansealgasinfreephase，gasinwater-dissolvingphaseandgasindifusephase．Evolutionofitssealabilityisdividedintothreestages．Shalecaprockwhichhasabilityofgeneratinghydrocarbonandhasabnormalporefluidpressure

6、canalsosealgasinfreephase，gasinwater-dissolvingphaseandgasindiffusephase，andevolutionofitssealabilityisdividedintofourstages．Studyonevolutionstdgesofshalecaprocktogasineachphasecannotonlyforecastchangeofsealabilityofshalecaprocktogasineachphase，butalsostudysealefficien’cyofshalecapr

7、ocktogasineachphase．TakingshalecaprockofK1q1+2，K1d2，andK1qninSanzhaoSaginnorthernSon~iaoBasinasexamples，sealcharacteristicsoftheirshalecaprockstogasineachphaseisstudiedthroughdividingtheirsealevolutionstagestogasindifferentphases，andtheirroleingasaccumulationandpreservationisstudied

8、throughrelationbetw