中国石油大学学报（自然科学版）2025，Vol.49Issue(3)：51-62,12.DOI:10.3969/j.issn.1673-5005.2025.03.006
尼日尔三角洲里奥—德雷盆地西南部阿格巴达组S5段沉积特征
Sedimentary characteristics of member S5 of Agbada Formation in the southwest of Rio Del Rey Basin,Niger Delta
栾守亮 1陈世悦 2张关龙 3王建伟 3王大华 3刘汝强 3袁井菊 4陈亮 3姜颖3
作者信息
- 1. 中国石油大学(华东)地球科学与技术学院,山东 青岛 266580||中国石化胜利油田分公司勘探开发研究院,山东 东营 257015
- 2. 中国石油大学(华东)地球科学与技术学院,山东 青岛 266580
- 3. 中国石化胜利油田分公司勘探开发研究院,山东 东营 257015
- 4. 中国石化石油勘探开发研究院,北京 100083
- 折叠
摘要
Abstract
Based on seismic interpretation and logging data analysis,and guided by sedimentological theory,this study inves-tigates the stratigraphy,sedimentary infill,and distribution characteristics of the S5 member of the lower Miocene Agbada Formation in the southwestern Rio Del Rey Basin,Niger Delta,Cameroon.A sedimentary model was established to predict favorable exploration targets.Five sedimentary microfacies were identified in the study area:underwater distributary chan-nels,mouth bars,distal bars,sheet sands,and underwater interdistributary bays.The northern sand bodies are predomi-nantly characterized by underwater distributary channels,which gradually transition southward into mouth bars,distal bars,and sheet sands.Vertically,the sedimentary sequence exhibits a north-to-south progradation trend.During the deposition of the S5 member,subaqueous mud diapirs developed and played a controlling role in sedimentation.The low-lying areas be-tween mud diapirs acted as sediment transport channels.As overlying strata accumulated,the mud diapirs experenced differ-ential uplift.The Mokoko mud diapir exhibited weak uplift and didn̍t penetrate the S5 member,while the Abana diapir showed strong uplift and pierced the S5 member.The downthrown side of syn-sedimentary faults associated with the mud dia-pirs provided favorable conditions for sand body development.In the northern area between the diapirs,a series of fault block structures formed near sediment source channels and away from diapir-related fault zones.Additionally,oil-source faults are well developed in this region,making it a promising target for future exploration in the MA block.关键词
沉积微相/沉积模式/泥底辟/阿格把达组S5段/尼日尔三角洲里奥—德雷盆地Key words
sedimentary microfacies/depositional mode/mud diapir/S5 member of Agbada Formation/Rio Del Rey Basin in Niger Delta分类
石油、天然气工程引用本文复制引用
栾守亮,陈世悦,张关龙,王建伟,王大华,刘汝强,袁井菊,陈亮,姜颖..尼日尔三角洲里奥—德雷盆地西南部阿格巴达组S5段沉积特征[J].中国石油大学学报（自然科学版）,2025,49(3):51-62,12.
