摘要
为了研究秦皇岛33-3和33-4油田油聚集与保存条件,在断层岩侧向封油机理及影响因素分析的基础上,通过建立断层岩排替压力预测方法,结合储层岩石排替压力和油藏剩余压力计算,对秦皇岛33-3和33-4油田明下段8条断层的断层岩排替压力及封油能力有效性进行了研究。结果表明:断层岩排替压力为0.006 0~0.043 8 MPa,储层岩石排替压力为0.003 4~0.009 4 MPa,前者大于后者,说明断层侧向上对油均是封闭的;断层岩与储层岩石排替压力之差略大于油藏剩余压力,断层封油能力有效,不会造成油通过断层岩侧向向外散失,有利于油在油藏内聚集与保存。研究成果可为成藏机理研究和油气勘探提供理论基础。
In order to study the oil accumulation and preservation conditions in Qinhuangdao 33-3 and 33-4 Oilfields,based on the analyses of the lateral oil-sealing mechanism and its influencing factors for the fault rocks,the predicting method of the displacing pressure of the fault rocks was established,and moreover combined with the calculations of the displacing pressure of the reservoir rocks and the remained pressure of the oil reservoirs,the displacing pressure of the fault rocks and its sealing ability effectiveness to the oil were studied for the 8 faults of Member N1 m1 in Qinhuangdao 33-3 and 33-4 Oilfields. The results indicate that the displacing pressure is 0. 006-0. 043 8 MPa,the displacing pressure of the reservoir rock is 0. 003 4-0. 009 4 MPa,the former is greater than the latter; this suggests that all the sealing of the faults in lateral direction are effective; the displacing pressure difference between the fault rocks and reservoir rock is bigger than that of the residual pressure of the oil reservoir,the oil-sealing ability is effective,so the oil cannot escape outside the fault rocks,thus it is favorable for the oil to accumulate and preserve in the oil reservoir. The study achievements can provide the bases for the accumulating mechanism research and the petroleum exploration.
作者
公晓华
GONG Xiaohua(No.10 Oil Production Plant of Daqing Oilfield Co Ltd.,Daqing 163315,China)
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2018年第4期26-31,共6页
Petroleum Geology & Oilfield Development in Daqing
基金
国家重大科技专项"典型大型气田(藏)盖层封闭性动态定量评价"(2016ZX05007003003)
关键词
断层岩
排替压力
预测方法
封油能力
秦皇岛油田
明下段
fault rock
displacing/flooding pressure
predicting/forecasting method
oil sealing ability/capacity
Qinhuangdao Oilfield
Member N 1m1
