摘要
油气运移的通道称为输导层或运载层。研究表明 ,伊兰—伊通盆地主要发育三种类型的输导层 :储层砂体、基岩不整合及断裂。储层砂体、基岩不整合主要作为油气横向运移的通道 ,断裂既可作为油气的遮挡层又可充当油气运移的通道 ,这与断裂的性质和活动强度有关 ,作为运移通道时主要起着担当油气垂向运移的通道或导致油气直接散失的作用。伊兰—伊通盆地可分为岔路河断陷、鹿乡断陷和莫里青断陷 3个二级构造单元 ,上述三个断陷的输导体系存在着差异 ,并控制了其油气的运聚和分布 :①砂体分布特征决定了莫里青断陷油气以近距离运聚为主 ,而断裂和基岩不整合面也为较长距离运移创造了条件 ;②双二段砂层是鹿乡断陷大南凹陷生成的油气大规模向五星构造带运移的优质输导层 ;③断裂在岔路河断陷中起垂向油气运移通道作用 ,对浅层油气藏的形成和破坏有着双重作用。
The path of oil and gas migration is c alled a carrying bed.Through an investigation,it is shown that there are three t ypes of carrying beds,i.e.sandbody reservoir,basement rock unconformity and faul t,in Yilan Yitong Basin.The sandbody reservoir and basement rock unconformity m ay be mainly taken as the paths of lateral oil and gas migration,and the fault m ay be taken as both a barrier and path of oil and gas migration,being dependent on the character and activity strength of the fault.As the path of migration,the fault is mainly taken as the path of vertical oil and gas migration or plays a role in hydrocarbon's being directly lost at the surface.Yilan Yitong basin may be divided into three second order tectonic units,such as Chaluhe,Luxiang and Moliqing Depressions.Controlling the oil and gas migration,accumulation and dist ribution,the carrying bed systems in the three depressions are different from ea ch.They are:①the oil and gas migration and accumulation in Moliqing Depression were mainly at a short distance,and the basement rock unconformity and fault cre ated conditions for a relatively long distance migration also;②Member Shuang 2 sandstone is an excellent carrying ded that caused the oil and gas generated i n Danan Seg of Luxiang Depression to be massively migrated toward Wuxing structu ral belt;and ③the fault in Chaluhe Depression is taken as the path of vertical oil and gas migration,playing a dual role,i.e.either making the deep buried re servoirs be destroyed or making the shallow reservoirs be formed.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2002年第1期31-32,9,共2页
Natural Gas Industry
关键词
油气运移
垂向运移
侧向运移
遮挡
输送
伊兰-伊通盆地
Oil and gas migration,Vertical migr ation,Lateral migration,Barrier (geology),Delivery,Yilan Yitong Basin
