摘要
利用岩心、测井、钻井、录井及地震资料,在建立层序地层格架的基础上,对二连盆地马尼特坳陷哈301断块沉积古地貌的构造演化特征进行分析,结果表明,该区发育辫状河三角洲前缘亚相,分为水下分流河道、河口坝、席状砂和水下分流河道间等微相。阿三段沉积期,西南缘潜山隆起与北部山区共同控制研究区的沉积展布,形成了南北分区的两个辫状河三角洲体系;随着潜山隆起的差异性构造沉降运动,在阿四下亚段沉积期,南部辫状河三角洲沉积体系规模较小,仍为南北分区的沉积格局;阿四中上亚段沉积期,南部隆起发生整体的构造沉降,接受来自北部物源的向潜山披覆沉积,印证了沉积古地貌及其潜山的构造演化控制了物源的供给方向,也控制了哈301断块的沉积展布及时空演化。
Based on the establishment of sequence stratigraphic framework, the structural evolution characteristics of sedimentary paleogeomorphology of Ha301 fault block in Manit depression of Erlian basin are analyzed by using core, well logging, well drilling, logging and seismic data. The results show that braided delta front sub facies were developed in this area, which could be divided into subaqueous distributary channel, estuary dam, sheet sand and subaqueous distributary channel. In the sedimentary stage of A3 member, the buried hill uplift in the southwest margin and the mountainous area in the north jointly controlled the sedimentary distribution of the study area, forming two braided river delta systems in the north and south regions. With the differential tectonic subsidence movement of buried hill uplift, the braided river delta depositional system in the south of the basin was still a sedimentary pattern of the north-south sub-region during the sedimentary period of the lower A4 member of the basin. During the sedimentary stage of the uppermiddle A4 member, the whole tectonic subsidence occurred in the southern uplift and received buried hill draping sediments from the northern provenance, which proved that the supply direction of provenance, the sedimentary distribution and space-time evolution of Ha 301 fault block were all controlled by tectonic evolution of the sedimentary paleogeomorphology and the buried hills.
作者
赵莹彬
马武明
丁勇
ZHAO Yingbin;MA Wuming;DING Yong(Exploration&Development Research Institute of Henan Oilfield Company,SINOPEC,Nanyang,Henan 473132,China;Tianjin Geological Survey Research Institute,Tianjin 300384,China;No.2 Oil Production Plant of Henan Oilfield Company,SINOPEC,Nanyang,Henan 473132,China)
出处
《石油地质与工程》
CAS
2020年第1期10-15,共6页
Petroleum Geology and Engineering
关键词
二连盆地
哈301断块
阿尔善组
沉积特征
沉积模式
Erlian basin
Ha 301 fault block
Arshan group
sedimentary characteristics
sedimentary pattern
