东北石油大学学报2025，Vol.49Issue(2)：71-83,96,14.DOI:10.3969/j.issn.2095-4107.2025.02.006
高位体系域海相三角洲源—汇特征及沉积模式
Source-sink characteristics and sedimentary model of marine delta facies in highstand system tract:a case study from the third member of the Lingshui Formation during the Oligocene in the Northern Baodao Sag,Qiongdongnan Basin,South China Sea
摘要
Abstract
The study focuses on the third member of the Lingshui Formation during the Oligocene in the Northern Baodao Sag of the Qiongdongnan Basin.Based on the characteristics of fault steep slope and transition slope in the fault tectonic transition belt,the location of source injection port is judged and quantitative analysis of gullies is carried out.Based on the comprehensive research method of seismic fa-cies,logging facies,core facies and single well facies,the spatial and temporal evolution of sedimentary facies types and sand bodies of each stage are analyzed.Through the comprehensive analysis of the cou-pling relationship between source,channel and sink,the delta sedimentary model of the highstand sys-tems tract of the third member of the Lingshui Formation in BD21 region is established.It is concluded that the reservoir group of"basin unit B-gully ⑤-delta lobe ⑤" has the characteristics of high composi-tional and structural maturity,fine grain size,sand-mudstone interbedding development due to long dis-tance transport,while the reservoir group of "basin unit A-gully ②-delta lobe ②" has alluvial fan into water,and the far end is transformed into traction flow deposit.It has the characteristics of small lateral variation,good vertical superposition,coarse grain size and large single layer thickness,and the rela-tionship between source-channel-sink configuration is good,which is the best reservoir facies type in this area.This study provides theoretical support for the next scale reservoir prediction,gas field develop-ment plan and well location deployment.关键词
高位体系域/海相/三角洲/源—汇特征/沉积模式/琼东南盆地/宝岛凹陷/渐新统/陵水组Key words
highstand systems tract/marine facies/delta/source-sink characteristics/sedimentary mod-el/Qiongdongnan Basin/Baosao Sag/Oligocene/Lingshui Formation分类
石油、天然气工程引用本文复制引用
林璐,李珊珊,夏磊,罗威,李科亮,李凤霞,吴仕玖,呙诗阳..高位体系域海相三角洲源—汇特征及沉积模式[J].东北石油大学学报,2025,49(2):71-83,96,14.基金项目
中海石油(中国)有限公司科技攻关项目(KJGG2022-0102) （中国）
