塔里木盆地构造枢纽带及其油气成藏条件  

Structural Pivot Zone and Its Oil-Gas Accumulation Conditions in Tarim Basin

作　　者：汪伟光[1] 吕修祥[2] 喻莲[1] 成克男 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油大学,北京102249 [3]中油测井技术服务有限责任公司,北京100083

出　　处：《新疆石油地质》2011年第4期333-337,共5页Xinjiang Petroleum Geology

基　　金：国家973项目(2005CB422108)

摘　　要：塔里木盆地经历了多期差异升降运动和周缘造山作用,形成了一系列构造枢纽带。枢纽带的形成与隆起、斜坡的形成演化密切相关。根据枢纽带的形成特点及其发育部位的不同,将其分为3类:隆起翘倾型枢纽带、斜坡反转型枢纽带和斜坡-隆起复合型枢纽带。塔里木盆地构造枢纽带油气成藏条件优越:枢纽带邻近烃源区,碳酸盐岩岩溶、风化壳、礁滩型储集层发育,圈闭以潜山、构造-岩性圈闭为主。相对于凹陷或烃源区,枢纽带处于高部位,是油气运移的指向区,而相对隆起高部位,其又处于相对较低的位置,有利于油气的保存,免遭破坏。因此,不管是对于油气的捕捉还是保存,枢纽带都处于极其有利的位置。枢纽带油气分布具明显的复式油气聚集特征。Tarim basin has undergone multi-stage differential elevating-subsiding motion and periphery orogeny,and formed a series of struc-tural pivot zones.Their formation is closely related to the formation and evolution of uplifts and slopes.According to the differences of forming characteristics and developing positions,the pivot zone can be divided into three types： uplift-tilted type,slope-reversed type and uplift-slope compound type.The superior hydrocarbon accumulation conditions are generally found in these types of pivot zones in adjacent source area,carbonate rock karst,weathering crust,reef-bank and karst type reservoirs,and traps are dominated by buried hill and structural-lithologic traps.With respect to sag or source areas,the pivot zones are normally in higher locations,being the pointing area of hydrocarbon migration;while with respect to the uplift top,they are in lower ones,favorable for hydrocarbon preservation.Therefore,no matter for hydrocarbon capture or preservation,the pivot zones always locate in favorable positions.In addition,the hydrocarbon distribution in pivot zones is obviously characterized by complex hydrocarbon accumulation.

关 键 词：塔里木盆地 叠合盆地 构造枢纽带 碳酸盐岩 油气成藏 

分 类 号：TE111.2[石油与天然气工程—油气勘探]