摘要
为了对含油气盆地油源断裂附近油气分布规律进行分析,以活动期油源断裂凸面脊输导油气条件研究为基础,利用油源断裂断层面古油气势能等值线法线会聚特征,刻画油源断裂凸面脊分布;利用油源断裂附近地层砂地比和地层脆性岩石发育所需的最小砂地比,刻画被油源断裂错断的地层脆性岩石分布;叠合二者建立了活动期油源断裂输导油气有利凸面脊分布的预测方法。应用实例结果表明:渤海湾盆地大柳泉地区活动期旧州断裂中北段在沙三中下亚段内共发育8个输导油气有利凸面脊,F7断裂、F8断裂和F9断裂分别发育2个、4个和2个。这些凸面脊的分布与旧州断裂中北段附近沙三中下亚段目前已发现油气的分布相吻合,表明该方法可有效预测活动期油源断裂输导油气有利凸面脊分布。
In order to analyze the distribution law of oil and gas near oil source faults in petroliferous basins,based on study of oil and gas transport conditions of convex ridges of oil source faults in active period,the distribution of convex ridges of oil source faults is determined by using normal convergence characteristics of paleo oil and gas potential energy isolines on the fault plane of oil source faults,the distribution of brittle rocks in faulted strata of oil source faults is determined by using sand-strata ratio near oil source fault and the minimum sand-strata ratio required for the development of formation brittle rocks,and a set of prediction methods for the distribution of favorable convex ridges for oil and gas transported by oil source fault in active period is established by coupling the distribution of convex ridges of oil source faults and that of brittle rocks in faulted strata of the oil source fault. Case application shows that there are 8 favorable convex ridges of oil and gas transported by the middle and north section of Jiuzhou fault in middle and lower sub-member of the 3rdmember of Shahejie Formation(Es3)during active period in Daliuquan area of Bohai Bay Basin(i.e.,F7 faults:2;F8 faults:4;F9 faults:2). The distribution of these convex ridges is consistent with the distribution of oil and gas discovered in the middle and lower sub-member of Es3near the middle and northern section of Jiuzhou fault,showing that this method can effectively predict the distribution of favorable convex ridges for oil and gas transported by oil source faults in active period.
作者
果文斌
马朋朋
董军
陈继成
李永峰
韩晶
GUO Wenbin;MA Pengpeng;DONG Jun;CHEN Jicheng;LI Yongfeng;HAN Jing(Daqing branch of China HuaYou Group Co.,Ltd.,Daqing,166400,China)
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2022年第4期54-59,共6页
Petroleum Geology & Oilfield Development in Daqing
基金
国家自然科学基金项目“砂泥岩层系中油源断裂输导油气优势路径演化及识别研究”(41872157)
“断砂配置侧向分流运聚油气机理及有利部位识别研究”(42072157)。
关键词
活动期
油源断裂
输导油气
有利凸面脊
预测方法
activity period
oil source fault
transporting oil and gas
favorable convex ridge
prediction method
