贝尔凹陷布达特群潜山油气运聚机制  

Oil-gas migration and accumulation mechanism of buried hills of Budate group in Beier depression

作　　者：于有[1] 魏微[2] 郭淑梅[3] 

机构地区：[1]大庆石油学院地球科学学院,黑龙江大庆163318 [2]大庆油田有限责任公司第二采油厂,黑龙江大庆163414 [3]吉林石油集团有限责任公司测井公司,吉林松原138000

出　　处：《大庆石油学院学报》2007年第3期1-3,共3页Journal of Daqing Petroleum Institute

基　　金：国家"973"重大基础研究项目(2001CB209104)

摘　　要：为了研究贝尔凹陷布达特群潜山油气运聚机制,对该区油气运移输导通道构成、输导特征、运聚时期和成藏模式进行了分析.结果表明:贝尔凹陷布达特群潜山油气运移输导通道主要是由不整合面和断裂构成的,潜山顶面由断裂和不整合面构成的油气运移输导通道是潜山顶部基岩风化壳油气藏形成的油气输导通道,潜山内部断裂和裂缝构成的垂向运移输导通道是潜山内部破碎带或裂缝油气藏形成的油气输导通道.由流体包裹体均一温度结合埋藏史和热史综合研究得到,贝尔凹陷布达特群潜山油气运聚成藏的主要时期应为伊敏组沉积末期,油气成藏主要有油气沿断裂侧向运移至古潜山风化壳聚集成藏、油气沿断层错动后的不整合面侧向运移至古潜山风化壳聚集成藏和油气沿断裂运移至潜山内部破碎带聚集成藏3种模式.The paper deals mainly with oil-gas migration and accumulation mechanism of buried hills of Budate group in Beier depression through the study of constitution of oil-gas transporting pathways, transporting characteristics, migration and accumulation periods and accumulation models. The oil-gas transporting pathway is considered to be composed by faults and unconformity. Top surface of buried hill that is composed by fault and unconformity to be main transporting pathway for oil-gas to migrate and accumulate in weathering crust on top of buried hills, fault and fracture in buried hills are transporting pathway for oil-gas to migrate and accumulate in crashed zone or fracture of buried hill. According to the study of fluid unclosed, combined with bury history and heat history, it was considered main migration and accumulation period of oil-gas of buried hill of Budate group in Beier depression to be the end of K2y sedimentation period. There are three oil-gas accumulation models of oil-gas accumulating in weathering crust in the top of buried hill migrating laterally through fault or unconformity and oil-gas accumulating in fracture or crushed zone of fault in buried hill migrating vertically through fault or fracture.

关 键 词：贝尔凹陷 布达特群 潜山 油气 运聚机制 运聚时期 输导通道 

分 类 号：TE122.1[石油与天然气工程—油气勘探]