海拉尔—塔木察格盆地地质特征与油气富集规律  

GEOLOGICAL CHARACTERISTICS AND HYDROCARBON ENRICHING RULES FOR HAILER-TAMUTSAG BASIN

作　　者：曹瑞成[1] 李春柏[2] 蒋鸿亮[3] 孙显义[1] 杨步增[2] 孙效东[2] 

机构地区：[1]大庆油田有限责任公司油藏评价部,黑龙江大庆163002 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [3]大庆油田有限责任公司技术发展部,黑龙江大庆163002

出　　处：《大庆石油地质与开发》2014年第5期124-130,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家重大科技专项“大型油气田及煤层气开发”(2011ZX05001-001-004);中国石油天然气股份公司重大科技专项“大庆油田原油4000万吨持续稳产关键技术研究”(2011E-1202)

摘　　要：海拉尔-塔木察格盆地位于蒙古—大兴安岭裂陷盆地群的东部.通过对多条横切构造走向的区域大剖面研究,证实了盆地由复式断陷组成.盆地在南屯伸展断陷期发育大量相对分隔的半地堑、小型地堑,随着盆地伸展构造变形,转入伊敏走滑期新发育的断陷叠置在先期发育的断陷之上,再经历构造活动隆升反转,形成了22个复式断陷组成的构造格局.断陷复合和叠加过程,决定了复式箕状断陷湖盆的地质特点、成藏条件,制约了主控因素与配置关系,决定了油气的分布规律.南屯期复式箕状断陷控制烃源岩的赋存,伊敏期走滑盆地控制烃源岩的演化,伊敏期末及白垩纪末构造反转活动控制油气的运聚和成藏.多期叠加的复式断陷主洼槽控制油气的形成与分布,富烃主洼槽内或边缘的断裂隆起带和缓坡断阶带两带富油。Hailer-Tamutsag Basin is located in East Mongolia-Daxing＇ anling fault basin group.By means of the researches on the many regional larger cross sections which perpendicularly cut the structural trends,the basin is testified to be composed of the complex fault depressions.A large amount of relatively separated half and small grabens are developed in Nantun extensional fault depression period of the basin,with the deformation of the extensional structures,the newly developed fault depression overlapped on the later developed failt depressions when entering into Yimin strike-slip stage,and then after the uplift reversion reformed by the structural activities,the structural framework being composed of 22 complex fault depressions are formed.In the structural compound and overlapped courses,the geologic features and accumulating conditions of the complex half-graben fault depression lake basin are determined,thus the matching relationship with the main controlling factors are strained,so the distributing laws of the petroleum are also determined.The complex winnowed fault depressions in Nantun Formation dominate the conversation of the hydrocarbon source rocks,the strike-slip basin in Yimin stage controls the evolution of the hydrocarbon source rocks,the structural inversion activities in Late Yimin and Cretaceous was in charge of the migration,accumulation of the hydrocarbon.The principal lows of the multi-period overlapped compound fault depression control the generation and distribution of the hydrocarbon,the petroleum is rich in the main lows or the two belts of both the fault uplift in the margins and fault terrace on the fiat slopes.

关 键 词：海拉尔—塔木察格盆地 复式断陷 地质特征 富油规律 

分 类 号：TE122.1[石油与天然气工程—油气勘探]