摘要
为研究含油气盆地下生上储式生储盖组合油气成藏规律,通过源岩和输导断裂空间位置关系、源岩排烃期与输导断裂活动时期之间关系及其与油气分布之间关系的分析,对源断时空匹配关系类型及特征和其对油气运聚的控制作用进行了研究。结果表明:源断空间匹配关系可以分为多源断、单源断和无源断3种,前2种油气沿输导断裂发生垂向运移,多源断匹配较单源断匹配更有利于油气大规模运移,后1种源岩生成的油气不能沿输导断裂发生垂向运移,只能对侧向运移起调整作用。源断时间匹配关系可以分为源早断晚、源晚断早和源断同期3种,只有源断同期匹配有利油气沿输导断裂大规模运移,其他2种匹配关系皆不利于油气沿输导断裂大规模运移。源断时空匹配关系对油气运聚的控制作用主要表现在2个方面:源断空间匹配关系控制着油气聚集部位和聚集数量;源断时间匹配关系控制油气成藏时期及聚集量。
In order to study the oil / gas reservoir- forming rules of lower generation and upper accumulation for oil / gas- bearing basin,through the analysis on the spatial relationship between source rock and conduction fractures,relationship between source expulsion period and activities of conduction fractures as well as its relations with oil / gas distribution,the study on types,features of space- time marching relationship between source and fracture and its controlling effect on oil / gas migration and accumulation was conducted. Results show that,space- time matching relationship between source and fracture can be divided into 3 types,namely,multi- source fracture,single- source fracture and no source fractures. The first 2 types migrate vertically along the conduction fracture. Multi- source fracture matching is more favorable for large- scale oil / gas migration than single- source fracture matching. The oil / gas generated by the last type of source rock cannot migrate vertically along conduction fracture,which can only adjust for lateral migration. Space- time matching relationship between source and fracture can be divided into 3 types,namely,'early- source late- fracture','late- source early- fracture'and'source and fracture of the same period'. Only'source and fracture of the same period'is favorable for large- scale oil / gas migration along the conduction fracture while other two types are not. Space- time matching relationship between source and fracture mainly controls the hydrocarbon migration and accumulation in 2 aspects. Firstly,it controls the accumulation location and quantity of oil / gas.Secondly,it controls oil / gas reservoir- forming period and accumulation amount.
出处
《特种油气藏》
CAS
CSCD
北大核心
2015年第4期42-46,153,共5页
Special Oil & Gas Reservoirs
基金
国家自然科学基金项目"油源断裂转换带优势输导油气条件研究"(41372153)
关键词
源岩
输导断裂
空间匹配关系
时间匹配关系
油气运移
油气聚集
source rock
conduction fracture
time matching relationship
space matching relationship
oil / gas migration
oil / gas accumulation
