洛带气田蓬莱镇组沉积相研究

Research on the Sedimentary Facies of Penglai Layer in Luodai Gas Field

对洛带气田蓬莱镇组进行了小层划分,观察了大量岩心,研究了沉积相特征及沉积微相特征.识别出蓬莱镇组属于浅水三角洲沉积体系,主要由三角洲前缘亚相的水下分流河道、水下分流河道间湾、水下决口河道和决口扇、前缘河口砂坝、远砂坝、前缘席状砂和前三角洲7个沉积微相构成,其特征为发育水下分流河道.

Based on observing the large number of cores and according to well logging data from the on - site testing, the author divide the member of Penglai layer in Luodai Gas Field, and analyze the feature of sedimentary facies and sedimentary microfa- cies. The author consider that the region of interest belongs to the depositional system of shcal water delta, it mainly consists of 7 sedimentary microfacies, as Delta front subfacies of underwater distributaries＂ channel, underwater crevasse channel and splay, underwater interdistributary bay, front mouth sandbar, distal bar, front sheet sand and fore -delta, and it is found out that the underwater distributary channel are mainly developed in the studied area.