摘要
为了更加准确地预测油源断裂活动期输导油气有利部位,基于油源断裂活动期输导油气机制及有利部位研究,通过确定断裂活动强度相对较大部位和被断裂错断地层脆性岩石发育部位,二者叠合改进以往只考虑断裂活动强度的油源断裂活动期输导油气有利部位预测方法,并将改进前后方法分别应用于冀中坳陷大柳泉地区旧州4条分支断裂,预测其活动期在沙三中下亚段内输导油气有利部位。结果表明:改进后方法预测得到的旧州4条分支断裂活动期在沙三中下亚段内输导油气有利部位主要分布在F1断裂北部局部、F7断裂南部、F8断裂中南部和北部以及F9断裂,明显小于改进前方法预测得到的主要分布在F1断裂北部、F7断裂南部和中北部、除南部局部外的F8断裂和F9断裂;改进后方法预测结果与旧州4条分支断裂附近沙三中下亚段油气分布之间吻合关系明显好于改进前方法,改进后方法预测得到的油源断裂活动期输导油气有利部位更符合地下实际。
In order to more accurately forecast the favorable positions of hydrocarbon transportation during the active period of oil-source faults,the positions with relatively high fault activity intensity and the positions of brittle rock development in the faulted strata were first determined based on the study of the mechanism and favorable positions of oil and gas transportation during the active period of oil-source faults.The superposition of the two improves the favorable positions of oil and gas transportation during the active period of oil-source faults,which in previous studies only the fault activity intensity was considered.The improved method was applied to four branch faults of the Jiuzhou fault in Daliuquan area of Jizhong Depression to forecast the favorable positions of hydrocarbon transportation in the middle and lower submembers of Es_(3) during the active period.The results show that the four branch faults of Jiuzhou predicted by the improved method are mainly distributed in the northern part of F1 fault,the southern part of F7 fault,the central and southern part and the northern part of F8 fault,and F9 fault.The predicted distributions are significantly smaller than those predicted by the previous methods,which are mainly distributed in the northern part of F1 fault,the southern and central-northern part of F7 fault,the F8 fault except the southern part and F9 fault.The prediction of the improved method is in good agreement with the oil and gas distribution found in the middle and lower submembers of Es_(3) near the four branch faults in Jiuzhou,and the favorable positions of oil and gas transportation predicted by the improved method in the active period of oil-source fault is more in line with the underground reality.
作者
付广
梁木桂
李健如
FU Guang;LIANG Mugui;LI Jianru(School of Earth Sciences,Northeast Petroleum University,Daqing 163318,China)
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2021年第6期42-50,共9页
Journal of China University of Petroleum(Edition of Natural Science)
基金
国家自然科学基金项目(41872157,42072157)。
关键词
油源断裂
活动期
输导油气
有利部位
改进前预测方法
改进后预测方法
oil-source fault
activity period
transporting oil and gas
favorable position
prediction method before improvement
improved prediction method
