四川盆地东北部赵家湾地区飞仙关组地层层序划分

Stratigraphic sequence division of Feixianguan Formation in Zhaojiawan area, northeastern Sichuan

运用层序地层学原理与方法,在应用单井电测曲线、岩性的基础上,对川东北赵家湾地区进行地层层序研究,识别出海平面升降界面,以沉积旋回表示,共识别出6个四级旋回,在层序划分的基础上建立起地层层序格架,通过对各旋回岩性厚度、地层后的的研究,细致划分了研究区内沉积相的展布与演化。

Based on the principle and method of sequence stratigraphy, based on the single well electric measurement curve and lithology, the stratigraphic sequence study of the Zhaojiawan area in northeastern Sichuan is carried out to identify the sea level lifting interface, which is represented by sedimentary cycles. A total of six four-level cycles were identified. Based on the sequence division, the stratigraphic sequence framework was established. Through the study of the lithological thickness and the post-stratum, the distribution of sedimentary facies in the study area was carefully divided. Evolution.