彭阳油田长3段成藏条件与成藏规律.pdf

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1、2016年3月西安石油大学学报(自然科学版)Mar．2016第3l卷第2期JournalofXianShiyouUniversity(NaturalScienceEdition)Vo1．31No．2DOI：10．3969／j．issn．1673-064X．2016．02．001中图分类号：TEl12．31文章编号：1673-064X(2016)02-0001．10文献标识码：A彭阳油田长3段成藏条件与成藏规律兰朝利，王奇，张欣(中国石油大学(北京)石油工程教育部重点实验室，北京102249)摘要：根据岩心分析、测井与试油资料，评价了彭阳油田长3段油藏成藏条件，厘定了关键成藏要素与成藏规律。长3

2、段油藏烃源岩为延长组长6、长7段暗色泥岩，在早白垩世末期成熟，由断层、裂缝和延长组顶不整合疏导体系大量进入目的层。油藏经历了4次挤压抬升，三叠纪末期挤压奠定其构造形态，形成了鼻状和低幅度圈闭；后三期挤压使目的层整体抬升，但未破坏油藏圈闭。构造、储层与聚集条件是控制油气成藏的关键因素。长3段构造、构造一岩性圈闭形成早于或同步于油气大量充注时期。受小型三角洲平原分流河道控制，长3段砂体宽度窄、厚度薄，且后期遭受了较强的成岩作用，决定了该油藏规模普遍较小。关键词：成藏条件；成藏规律；延长组长3段；彭阳油田；鄂尔多斯盆地HydrocarbonAccumulationConditionsandRules

3、inSandstoneReservoiroftheThirdMemberofYanchangFormationinPengyangOilfieldLANChaoli，WANGQi，ZHANGXin(MOEKeyLaboratoryofPetroleumEngineering，ChinaUniversityofPetroleum(Beijing)，Beijing102249，China)Abstract：ThehydrocarbonaccumulationeonditionsofthesandstonereservoirsofthethirdmemberoftheYanchangFormatio

4、n(Chang3)inPengyangOilfieldwereevaluatedbasedoncoreanalysis，loggingandoiltestingdata，andthekeyhydrocarbonaccumulationfac—torsandrulesweredetermined．ThehydrocarboninChang3reservoirismainlyfromthedarkmudstonesofChang6andChang7mem—ber，itmaturedintheendoftheearlyCretaceousandlargelyenteredtheChang3reser

5、voirthroughfaults．fracturesandtheunconformityonthetopoftheYanchangFormation．TheChang3reservoirhadundergonecompressionanduplift4timesintheendofTriassic．theearlyJurassic，themiddleJurassicandthelateCretaceousrespectively．ThecompressionandupliftintheendoftheTriassicestablishedabasicmonoclinewitheasttend

6、encyandE—Wstrikingnosestructuresandlow—amplitudeanticlinesforChang3member；thelaterthreecompressionsmadetheChang3memberupliftasawhole，butdidnotdamagethestructuraltraps．Structure，reservoirdistributionandhydrocarbonaccumulationconditionsarethekeyfactorstothehydrocarbonaccumulationinChang3member．Thestru

7、cturaltrapsandthestructural—lithologiealtrapsintheChang3memberformedbeforeoratthesametimeagreatdealofhydrocarbonchargedthereservoir．Underthecontrolofthesmalldeltaplaindistributarychannel，thewidthandth