摘要
为了正确对比上三叠统、正确认识和评价上三叠统储层,中油西南油气田公司在2003年布设了川中-川南过渡带二维地震连井剖面。在此基础上,结合钻测井资料,对上三叠统进行精细对比解释及深入分析研究,发现川中香溪群与川南须家河组内部地层对应关系:即川中香四段顶界相当于蜀南须二段顶界;川中香二段顶界为蜀南划分的须一内部;而蜀南划分的须四段顶界,为川中区域划分的香六内部。
As the oil/gas exploration goes deeper and deeper,how to compare the Upper Triassic formations correctly are the important preconditions to understand and evaluate Upper Triassic reservoir correctly.According to the fine comparison and interpretation of the 2-D seismic data with wells acquired in the transitional zone from Central Sichuan to South Sichuan,and the deep investigation of regional sedimentary facies,drilling and logging data for the Upper Triassic formations,stratigraphic correlative relation between Xiangxi Group in Central Sichuan and Xujiahe Group in South Sichuan is found: i.e. the top boundary of Xiang Section 4 in Central Sichuan is equal to the top boundary of Xu Section 2 in South Sichuan;the top boundary of Xiang Section 2 in Central Sichuan is equal to the reflecting bed within Xu Section 1 in South Sichuan;and the top boundary of Xu Section 4 in South Sichuan is equal to the reflecting bed within Xiang Section 6 in Central Sichuan.
出处
《天然气勘探与开发》
2006年第2期6-9,17,共5页
Natural Gas Exploration and Development
关键词
四川盆地
上三叠统
地层对比
Sichuan Basin,Upper Triassic,sand shale,stratigraphic correlation,sedimentary facies
