松辽盆地北部泰康—西超地区层序地层分析

ANALYSIS OF SEQUENCE STRATIGRAPHY FOR TAIKANG-XICHAO AREA OF THE NORTH SONGLIAO BASIN

厉玉乐 张银国 陈建文

LI Yu-le ZHANG Yin-guo CHEN Jian-wen

中国地质大学, 北京, 100083 2. 大庆油田, 勘探分公司, 黑龙江, 大庆, 163453 3. 青岛海洋地质研究所, 山东, 青岛, 266071 4. 中国海洋大学, 山东, 青岛, 266003

China University of Geosciences, Beijing 100083, China 2. Exploration Branch, Daqing Oilfield, Daqing, Heilongjiang 163453, China 3. Qingdao Institute of Marine Geology, Qingdao, Shandong 266071, China 4. Ocen University of China, Qingdao, Shandong, 26603, China

作者以T.A.Cross高分辨率层序地层理论与分析技术为指导,通过岩心、钻井资料的综合研究,结合地震资料,对松辽盆地北部泰康—西超地区青山口组(青二、三段)—姚家组—嫩江组(嫩一段)进行了高分辨率层序界面的识别与中期/短期旋回的划分,共识别出13个有时间地层对比意义的界面,包括6个层序界面(基准面下降到上升的转换面)和7个湖泛面(基准面上升到下降的转换面).另外,还详细阐述了层序特征,并分析了研究区的层序地层模式.这对于寻找非构造气藏具有重要的指导意义.

This paper focused on the application of high-resolution sequence stratigraphy to the formations,i.e.,the second and the third sections of the Qingshankou-Yaojia Formation and the first section of the Nenjiang Formation in Taikang-Xichao area of the North Songliao Basin.Based on the comprehensive study of logging,drilling and seismic information,two scales of stratigraphic cycles (short-term and intermediate-term) can be recognized in the study area.The formations were divided into thirteen chronostratigraphic boundaries,including six sequence boundaries,which were the transformation from base-level fall to base-level rise,and seven lake-flood surfaces,which were the transformation from base-level rise to base-level fall.Then,features of these sequences were described detailed and sequence stratigraphical patterns were analyzed.This will be of guide significance for the discovery of non-structural reservoirs.

https://doi.org/10.11781/sysydz200306694