泌阳凹陷南部陡坡带核桃园组沉积体系研究

摘要

The present paper gives a detailed description of the depositional systems in the Palaeogene Hetaoyuan Formation in southern Biyang depression on the basis of geological, cores, well logs and seismic data. Two depositional systems have been distinguished, including the fan delta and lacustrine depositional systems. The fan delta depositional system consists of fan-delta plain, fan-delta front and pro-fan delta subfacies. The lacustrine depositional system is built up of the shallow lake, bathyal lake and abyssal lake subfacies. The sediment detritus are derived mainly from the Pingshi and Yangqiao regions. Finally the sedimentary models are constructed, and the favourable areas are delimited for future petroleum exploration%对泌阳凹陷南部陡坡带古近系核桃园组砂层组沉积体系进行了研究,认为研究区核桃园组属扇三角洲-湖泊沉积体系.根据沉积环境和沉积物特征可划分为扇三角洲平原、扇三角洲前缘及前扇三角洲亚相,以三角洲前缘亚相为沉积主体.湖泊沉积体系可分为浅湖亚相、半深湖、深湖亚相.沉积物主要来源于平氏、杨桥南部.