海相油气地质2025，Vol.30Issue(3)：206-216,11.DOI:10.3969/j.issn.1672-9854.2025.03.002
莺歌海盆地乐东区莺歌海组一段坡折带的砂体展布特征及其对气田挖潜的意义
The distribution characteristics of sand bodies in the slope break zone of the 1st member of Yinggehai Formation in Ledong area and its significance to the potential mining of gas fields
王玉 1周伟 1兰张健 1叶青 1商建霞 1饶资 1董德喜 1秦莎1
作者信息
摘要
Abstract
The Ledong gas field group is located near the slope break zone of the Yinggehai Basin,and the gas field has entered the middle and late stages of development,and it is of great significance to clarify the distribution of residual gas for tapping the remaining potential of the gas field.It is important to conduct research on sedimentary facies types,sedimentary models,sand body stacking relationships,and configurations based on rock facies characterization,grain size analysis,logging facies identification,and seismic facies characterization of the 1st member of Yinggehai Formation.Two types of sedimentary facies are identified in the research area,including littoral-shallow marine,and submarine fan.Among them,the littoral-shallow marine subfacies can be further subdivided into three types of sedimentary microfacies:shoreface bar,shoreface beach,and shelf mud.Three types of sedimentary models have been established:progradational shallow marine beach-bar composite model on the gentle shelf slope;slump-reworked bar-filling depositional model at the slope margin;shallow marine gravity-flow slump fan model below the slope break.Three types of sand body stacking relationships have been identified:progradational stacked sand bodies developed above the slope break zone exhibit good connectivity;laterally contacted stacked sand bodies(formed by slump-reworked bar sands)near the slope break show moderate connectivity;vertically isolated submarine fan sands deposited below the slope break display poor connectivity.The slump-reworked bar sand bodies near the slope break zone and the submarine fan-derived sand bodies below the slope break are identified as the most promising potential targets for future gas field development.关键词
沉积坡折/滨浅海砂坝/海底扇/砂体叠置关系/莺歌海组一段/乐东地区/莺歌海盆地Key words
sedimentary slope break/littoral-shallow marine sand bar/submarine fan/sand body stacking relationship/the 1st member of Yinggehai Formation/Ledong gas field/Yinggehai Basin分类
石油、天然气工程引用本文复制引用
王玉,周伟,兰张健,叶青,商建霞,饶资,董德喜,秦莎..莺歌海盆地乐东区莺歌海组一段坡折带的砂体展布特征及其对气田挖潜的意义[J].海相油气地质,2025,30(3):206-216,11.
