摘要
为了研究南堡凹陷东一段油气分布规律,在油源断裂分布与其输导时期和源岩发育与生排烃高峰期研究的基础上,对南堡凹陷东一段源断时空匹配关系及其对油气成藏的控制作用进行了研究。结果表明:南堡凹陷东一段好的源断空间匹配关系区主要分布于凹陷中部地区;中等源断空间匹配关系区主要分布在好源断空间匹配关系分布区四周,且北部分布面积大于南部;差源断空间匹配关系区主要分布在凹陷西部、东部及南部局部地区。东一段源断时间匹配关系最好的是东一段沉积时期,油源断裂活动时期与沙三段和沙一段源岩第一次大量排烃同期,其次是明化镇组—第四系沉积时期,油源断裂活动时期与沙三段和沙一段源岩第二次大量排烃同期,最差的是沙二、三段沉积时期,油源断裂活动,但源岩未开始排烃。源断时空匹配关系对东一段油气成藏与分布的控制作用主要表现在2个方面:(1)中等和好源断空间匹配关系区内及其附近应是东一段油气成藏的有利区,(2)明化镇组—第四系沉积时期应是东一段油气成藏的主要时期。
To understand the hydrocarbon distribution law in Ed1 member of Nanpu Sag, the time-space matching relation between source rock and oil-source faults of Ed1 member in Nanpu Sag and its control effect on hydrocarbon accumulation were studied based on the research of the distribution and transporting periods of oil-source faults and the development and hydrocarbon generation and expul- sion peak periods of source rock. The research results show that the good source-fauh space matching area distributes mainly in the cen- ter part of the sag ;the secondary source-fauh space matching area distributes around the good source-fauh space matching area, and the northern distribution area is larger than the southern distribution area;the poor source-fauh space matching area distributes in the west- ern, eastern and southern local parts of the sag. The best source-fauh time matching is in Ed1 sedimentary period, the activity period of oil-source faults is the same as the time of the first large hydrocarbon expulsion of Es3 and Es1 source rocks;the better source-fauh time matching is from Minghuazhen Formation to Quaternary sedimentary period, the activity period of oil-source faults is the same as the time of the second large hydrocarbon expulsion of Es3 and Es1 source rocks;the worst source-fault time matching is from Es2 to Es3 sedi- mentary period, oil source faults were active but source rocks did not discharge hydrocarbon. The control effect of the time-space matc- hing relation between source rock and oil-source faults of Ed1 member on hydrocarbon accumulation and distribution is mainly in 2 as- pects ： the good and secondary source-fauh space matching areas and their adjacent areas are the favorable region to Ed1 hydrocarbon ac- cumulation;Minghuazhen Formation to Quaternary sedimentary period is the main stage of Ed1 hydrocarbon accumulation.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2017年第4期11-17,共7页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家自然基金项目"断层岩水压张裂漏油主控因素及张性破裂压力预测"(编号:41372154)
关键词
油源断裂
源岩
时空匹配
油气聚集
控制作用
东一段
南堡凹陷
oil-source fault
source rock
time-space matching
hydrocarbon accumulation
control effect
Edl member
Nanpu Sag
作者简介
高宁（1973-），女，副教授，主要从事油气藏形成与保存研究。E—mail：gaoning730603@126．com
通讯作者：付广（1962-），男，教授，主要从事油气藏形成与保存研究。E-mail：fuguang2008@126．com
