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渤海湾盆地沙垒田地区新近纪走滑断裂发育特征及其对油气富集的控制作用
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  • 英文篇名:Characteristics of the Neogene strike-slip faults and their controls on hydrocarbon accumulation in Shaleitian uplift,Bohai Bay Basin
  • 作者:张正涛 ; 林畅松 ; 李慧勇 ; 黄志 ; 张国坤
  • 英文作者:Zhang Zhengtao;Lin Changsong;Li Huiyong;Huang Zhi;Zhang Guokun;School of Energy Resources,China University of Geosciences(Beijing);School of Ocean Sciences,China University of Geosciences(Beijing);Tianjin Branch Company Ltd. ,CNOOC;
  • 关键词:高角度裂缝 ; 走滑断裂 ; 断裂特征 ; 圈闭类型 ; 断裂控藏 ; 新近纪 ; 沙垒田凸起 ; 渤海湾盆地
  • 英文关键词:high-angle fracture;;strike-slip fault;;fault characteristics;;trap type;;hydrocarbon accumulation controlled by faults;;Neogene;;Shaleitian uplift;;Bohai Bay Basin
  • 中文刊名:SYYT
  • 英文刊名:Oil & Gas Geology
  • 机构:中国地质大学(北京)能源学院;中国地质大学(北京)海洋学院;中海石油(中国)有限公司天津分公司;
  • 出版日期:2019-04-28 10:09
  • 出版单位:石油与天然气地质
  • 年:2019
  • 期:v.40
  • 基金:国家自然科学基金项目(91328201);; 国家科技重大专项(2011ZX05023-002-004)
  • 语种:中文;
  • 页:SYYT201904009
  • 页数:11
  • CN:04
  • ISSN:11-4820/TE
  • 分类号:98-108
摘要
沙垒田凸起地区是渤海海域西部新近系油气最为富集的区域,为了明确新近系走滑断裂发育特征及对油气富集的控制作用,依托连片高精度三维地震、钻井取心等资料,对走滑断裂类型及发育特征进行了详细刻画,并对走滑断裂与成藏要素之间的关系进行了探讨。综合研究表明:研究区发育断穿基底走滑断裂、盖层走滑断裂及伸展-走滑断裂三种不同类型走滑断裂;走滑断裂对圈闭的控制作用表现为在不同类型走滑断裂控制下,断裂带内及断裂带间形成了多种类型圈闭,其中大型披覆背斜圈闭、断鼻、断背斜圈闭为有利圈闭,小型断块圈闭为不利圈闭;走滑断裂对输导体系的控制作用体现在断裂活动控制了骨架砂体输导体系及断裂输导体系的形成发育,有利于周边凹陷成熟烃源岩排烃及运移输导;走滑断裂对储层的控制作用表现为走滑作用形成的高角度裂缝提高了储层渗透率,改善了储层物性。新近纪普遍发育的走滑断裂是研究区油气富集的主控因素。
        Shaleitian uplift is the most abundant area for Neogene hydrocarbon accumulation in the western Bohai Sea.In order to clarify the characteristics of strike-slip fault growth and their controls on hydrocarbon accumulation,the fault types and development characteristics were described in detail using high resolution 3-D seismic and core data,and the relationship between strike-slip faults and hydrocarbon play elements was also discussed.The results show that there are three types of strike-slip faults developed in the study area,namely the basement involved strike-slip faults,caprock strike-slip faults and extensional strike-slip faults.Various types of traps are formed within or between fault zones under the influence of different types of strike-slip faults.Among others,the large-scale drape anticline,fault-nose and faulted anticline traps are favorable traps,but the small-scale fault-block traps are adverse ones.Strike-slip faults control the formation and development of skeletal sand body and fault conduit systems,which are pathways for hydrocarbon expulsion and migration from mature source rocks from adjacent sags.High-angle fractures caused by strike-slip improve reservoir qualities such as permeability.Strike-slip faults widespread in the Neogene formations are the main factors controlling hydrocarbon accumulation in the study area.
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