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1、第29卷第6期石油學(xué)報(bào)Vo1.29No.62008年l1月ACTAPETROLEISINICANOV.2008文章編號(hào):0253—2697(2008)06—0804—05油氣儲(chǔ)量評估與油氣藏圈閉成因的主控因素吳國干胡允棟王永祥王德發(fā)胡素云袁選俊(1中國石油勘探與生產(chǎn)分公司北京1{11}o11;2中國石油勘探開發(fā)研究院北京100083;3中國地質(zhì)大學(xué)北京100083)摘要:用容積法進(jìn)行油氣儲(chǔ)量計(jì)算涉及三種邊界,即圈閉邊界、油氣藏邊界和儲(chǔ)量邊界,只有正確理解這三種邊界的具體含義,合理把握已有資料對前兩
2、種邊界的證實(shí)程度,才能合理地把握不同級(jí)別的儲(chǔ)量邊界。油氣藏圈閉成因的各要素也是不同級(jí)別儲(chǔ)量邊界劃分的界定要素,其中油氣藏類型是主要前提:構(gòu)造圖和流體界面的證實(shí)程度決定了構(gòu)造油氣藏儲(chǔ)量的可靠性;尖滅線位置是沉積型巖性圈閉油氣蕨最大的儲(chǔ)量邊界;物性邊界與流體邊界共同控制了成巖型巖性圈閉油氣藏的儲(chǔ)量規(guī)模;不整合面如同斷層面一樣,控制了地層型巖性不整合圈閉油氣藏油氣的分布。無論何種主控因素,在平面最大和縱向最深的界線范圍內(nèi),井控程度是決定探明儲(chǔ)量范圍的控制因素。關(guān)鍵詞:油氣儲(chǔ)量;圈閉;油氣成藏;容積法;儲(chǔ)
3、量計(jì)算;主控因素中圖分類號(hào):TE15文獻(xiàn)標(biāo)識(shí)碼: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