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ID:36781857
大小:1.22 MB
页数:5页
时间:2019-05-15
《油气储量评估与油气藏圈闭成因的主控因素》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、第29卷第6期石油学报Vo1.29No.62008年l1月ACTAPETROLEISINICANOV.2008文章编号:0253—2697(2008)06—0804—05油气储量评估与油气藏圈闭成因的主控因素吴国干胡允栋王永祥王德发胡素云袁选俊(1中国石油勘探与生产分公司北京1{11}o11;2中国石油勘探开发研究院北京100083;3中国地质大学北京100083)摘要:用容积法进行油气储量计算涉及三种边界,即圈闭边界、油气藏边界和储量边界,只有正确理解这三种边界的具体含义,合理把握已有资料对前两
2、种边界的证实程度,才能合理地把握不同级别的储量边界。油气藏圈闭成因的各要素也是不同级别储量边界划分的界定要素,其中油气藏类型是主要前提:构造图和流体界面的证实程度决定了构造油气藏储量的可靠性;尖灭线位置是沉积型岩性圈闭油气蕨最大的储量边界;物性边界与流体边界共同控制了成岩型岩性圈闭油气藏的储量规模;不整合面如同断层面一样,控制了地层型岩性不整合圈闭油气藏油气的分布。无论何种主控因素,在平面最大和纵向最深的界线范围内,井控程度是决定探明储量范围的控制因素。关键词:油气储量;圈闭;油气成藏;容积法;储
3、量计算;主控因素中图分类号:TE15文献标识码:AMaincontrolfactorsforestimationofoilandgasreservesandgenesisoftrapsinoilandgasreservoirsWUGuoganHUYundongWANGYongxiangWANGDefaHUSuyunYUANXuanjun(1.PetroChinaExplorationandProductionCompany,Belying100011,China;2.PetroChinaEacpl
4、orationandDevelopmentResearchInstitute,Belying100{)83,China;3.ChinaUniversityofGeosciences,Belying100083,China)Abstract:Therearethreetypesoflimitsorboundariesinvolvedintheestimationofoilandgasreserveswithvolumetricanalysis,in—cludingtrapboundaries,res
5、ervoirlimitsandreservelimits.Thereservelimitsindifferentclassescouldbedeterminedwithpropercertainties,onlywhenthedefinitionsofthosethreeboundariesarecorrectlydetermined,andtheexisteddataarereasonablyesti—matedasevidencesrelatedtOthefirsttwoboundaries.
6、Theelementsaspartsofreservoir-formingmechanismarealsothefactorsinconsideringvolumeassignmentsasdifferentreservecategories.Amongthem,thereservoirtypeistheprimarycondition.Forthestructuralreservoirs,thereliabilityofreservesissubjecttOtheextentofattestat
7、iontOstructuremapsandfluidcontacts.Forthesedimentarylithologicaldeposits,thepositionsofpinchoutlinesdelineatethemaximumoutlinesofreservoirs.Fordiageneticlithol—ogicalhydrocarbontraps,thecutoffsofporosityorpermeabilityandthefluidcontactscontrolthereser
8、voirsizes.ForunconformablescreenedIithostratigraphicreservoirs,theunconformitydominatesthedistributionofoilandgas.Whatevertheprincipalfactoris,withinthemaximaloutlinesinlateralandthelowestdepthinvertical,thedrainageareaofwellisthekeyfactortOas
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