东北石油大学学报2025，Vol.49Issue(3)：83-96,14.DOI:10.3969/j.issn.2095-4107.2025.03.007
松辽盆地北部昌德地区白垩系泉头组四段浅水三角洲砂体结构及控制因素
Sand body structure and controlling factors of shallow water delta sand bodies in fourth member of Cxeta-ceous Quantou Formation,Changde Area,Northern Songliao Basin
摘要
Abstract
In response to the widespread distribution and diverse types of sand bodies in the fourth mem-ber of the Cretaceous Quantou Formation in the Changde Area of the Northern Songliao Basin,which affect the exploration and development of tight sandstone oil and gas reservoirs in the later stage.This study uses core,logging,paleontological and geochemical data to explore the structural characteristics and controlling factors of sand bodies in the fourth member of the Quantou Formation in the Changde Area.The results indicate that the fourth member of the Quantou Formation in Changde Area has de-veloped a shallow water delta shallow lake sedimentary system.The shallow water delta plain subfacies mainly develop distributary channels and crevasse fan sediments.The distributary channels exhibit a large number of small trough shaped cross bedding,wedge-shaped cross bedding,and parallel bedding,among other strong hydrodynamic structures.The shallow water delta front subfacies mainly develop underwater distributary channels and sheet-like sand deposits,with weak hydrodynamic structures such as wavy bedding and sand ripple bedding.Shallow water delta plains are relatively more enriched in front edge sand bodies and have a higher sand to land ratio.The vertical structure of the fourth member of the Quantou Formation in Changde Area shows four types of stacking styles:block cutting stacking,block stacking,layered stacking,and single isolation.The horizontal structure shows three types of contact relationships:lateral cutting,lateral docking,and mudstone spacing.The physical properties of differ-ent sand body structures are different.The changes in ancient climate affect the supply of sediment,changes in base level affect the available space,and the effects of rivers and lake waves promote the con-struction and destruction of sand bodies in the lake basin along with the river flow.The combination of ancient climate,base level rise and fall,and hydrodynamics affects the structure of sand bodies.This re-sult provids assistance for the development of shallow water delta oil and gas reservoirs.关键词
松辽盆地北部/昌德地区/泉头组四段/浅水三角洲/砂体结构/控制因素Key words
Northern Songliao Basin/Changde Area/fourth member of Quantou Formation/shallow water delta/sand body structure/control factors分类
天文与地球科学引用本文复制引用
钱子桐,邓庆杰,杨烁,胡明毅,胡忠贵,蔡全升,林婉媚..松辽盆地北部昌德地区白垩系泉头组四段浅水三角洲砂体结构及控制因素[J].东北石油大学学报,2025,49(3):83-96,14.基金项目
国家自然科学基金项目(42202161) （42202161）
国家科技重大专项(2017ZX05013-006) （2017ZX05013-006）
