摘要
在万安盆地北部隆起西南段发现的西卫16潜山披覆构造油气藏,是一个大型、高丰度、高产、轻质油气藏。本文详细讨论了该构造的生、储、盖和圈闭条件,利用流体势软件计算了不同目的层的流体势,绘制了不同目的层的油、水势叠合图和气、水势叠合图,分析了圈闭相邻凹陷油气运聚与圈闭时空匹配关系;编制主要断层的断面剖面图,综合考虑断裂活动性质、持续时间、断裂带物质、岩性对接情况等多种地质因素,对断层封闭条件进行了分析,从三维方向来研究断层的侧封、顶封情况;在此基础上对该构造油气聚集规律及油气运聚地质模式进行分析,认为该构造油气以侧向和阶梯式运聚模式为主,具备了形成大型复式油气藏的条件。
It is informed that the Xiwei-16 buried-hill drape-structure oil-gas field discovered in the southwestern part of the Northern Uplift of Wan' an Basin contains some large-scale, abundant, high-yield, light petroliferous reservoirs. The authors thereby intend to deal with in detail their source-reservoir-cap-trap conditions, to plot the oil-water and gas-water super- positional potential maps of every target bed, to analyse the time-space matching relation of the traps and oil-gas migration-accumu1ation process in relationship with the bordering depres- sions , to lay down profiles of some major faults so as to examine their 3-D top-sealling and lat- eral-sealling conditions, to research the regularity and geological modle of migration and accu- mulation, etc. They conclud at last that the oil-gas migration modle of this petroleum field is essentially lateral and steplike, those nessaseary conditions forming large-scale, composite oil- gas reservoirs are provided consequently.
出处
《南海地质研究》
1998年第10期56-70,共15页
Gresearch of Eological South China Sea
关键词
流体势
复式油气藏
圈闭
成藏条件
油气藏
南海
fluid potential, migration modle, compound reservoir, oil-gas trap.
