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时间:2019-03-03
《海相地层水文地球化学与油气保存条件评价》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、万方数据第40卷第3期2006年3月浙江大学报(工学版)JournalofZhejiangUniversity(EngineeringScience)V01.40NO.3Mar.2006海相地层水文地球化学与油气保存条件评价楼章华1,金爱民1,付孝悦2(1.浙江大学海洋系,浙江杭州310028;2.中国石化南方分公司,云南昆明650200)摘要:针对中国南方海相地层经历多期构造运动和油气藏破坏严重的问题,提出评价油气保存条件的水文地球化学方法.基于大气水下渗对油气藏保存具有破坏作用并淡化了地层水的原理,通过分析松潘一阿坝地区和十万
2、大山盆地现今地下水动力特征,利用温泉和方解石脉稳定同位素资料,分别计算了现今和古大气水下渗深度.在分析中国典型海相盆地和南方海相地层水化学基本特征的基础上,对比地表水体的地球化学特征,总结了一套评价海相地层油气保存条件的水文地球化学综合指标体系.结果表明,中国南方海相地层油气保存条件总体较差,现今和古大气水下渗强烈.不同时代地层水被下渗大气水下渗淡化明显.关键词:南方海相地层;油气保存条件;水文地球化学;水动力中图分类号:TEl44,TVl38文献标识码:A文章编号:1008—973X(2006)03—0501一05Studyon
3、hydrogeochemistryandevaluationtechnologyofpetroleumpreservationconditionsformarinestrataLOUZhang—hual,JINAi—minl,FUXiao—yue2(1.DepartmentofOceanSciencesandEngineering,ZhejiangUniversity,Hangzhou310028,China;2.SouthernExplorationandDevelopmentCompany,SINOPEC,Kunmin6502
4、00,China)Abstract:Forresolvingproblemsofundergoingmanytectogenesisesandheavybreachofoil—gaspoolsinSouthChinainmarine,ahydrogeochemicalmethodforevaluatingthepetroleumpreservationconditionswasproposed.Basedonthetheorythatthedownwardinfiltrationofmeteoricwaterhasactionso
5、fdesal—tingstratawateranddestroyingoil—gaspools,thepresentundergroundhydrodynamiccharacteristicsofSongpan—AbaareaandShiwandashanbasinwereanalyzed,andthedownwardinfiltrationdepthofpresentandpaleo——meteoricwaterwasreckonedrespectivelybyusinghotspringandcalcitestabilizat
6、ionisotopeda—·ta.AfterthestratahydrochemicalcharactersoftypicalmarinebasinandsouthernmarinestratainChinawerestudiedandwerecontrastedwiththegeochemicalcharactersofsurfacewater,asystematicalhydro—geochemicalindexsystemwassummarizedforevaluatingpetroleumpreservationcondi
7、tionsinmarinestra—ta.TheexperimentalresultsshowthatthepetroleumpreservationconditionsarepoorasawholeinSouthChinamarinestrata,downwardinfiltrationofpresentandpaleo—meteoricwaterisstrong.Thestratumwa—terindifferentepochstrataisobviouslydesalted.’Keywords:marinestratains
8、outhChina;hydrocarbonpreservationconditions;hydrogeochemistry;hydro—dynamic我国南方海相地层的油气藏分别在加里东、印支和燕山期经历了多期多阶段的演变过程,被构造活动改造的强度
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