古地理学报2017，Vol.19Issue(4)：609-622,14.DOI:10.7605/gdlxb.2017.04.047
高频基准面旋回控制下浅水三角洲及其砂体发育模式:以松辽盆地扶余油田白垩系泉头组为例
Development pattern of shallow-water delta and sandbodies under control of high-frequency base-level cycles: A case study of the Cretaceous Quantou Formation in Fuyu Oilfield, Songliao Basin
摘要
Abstract
Shallow-water delta reservoirs play an important role in the petroleum exploration of lacustrine basin,but so far,research based on data of dense well block is rare.Guided by high-resolution sequence stratigraphic theory and sedimentology,and based on 14 core well data and 700 well logging data of the 3rd Group of Member 4 of Cretaceous Quantou Formation in DT91 block of Fuyu Oilfield in Songliao basin,this paper analyzed the development regularity of shallow-water delta and sand bodies under control of high-frequency base-level cycle.The result indicated that:(1) Six types of sandbodies including channel sandbodies,overflowed sandboies,distributary bar,natural levee,crevasse splay and sheet sandbodies are widely developed in the shallow-water delta reservoirs,and channel and distributary bar sandbodies are dominant;(2) Four physical interfaces of base-level cycle including channel erosion surface,progradation-retrogradation,retrogradation-progradation interfaces and flood surface can be indentified in drilling cores and well logging data;seven types of super-short-term base-level cycle can be identified.(3)During the evolution of high frequency base level cycle,the accommodation for a shallow water delta showed little variation,while the sediment supply rate played the main role in the variation of A/S (accommodation increasing rate,A;sediment supply rate,S),and thus controlled the variation of quantity and space contact relationship of genetic sandbodies.As the A/S increased,the scale of shallow water delta and the quantity of genetic sandbodies were rapidly decreased;Accordingly,genetic sandbodies stacking pattern changed from downcuting,overlapping to solitary,and the continuous degree of the planar diatribution of sandbodies changed from higher to lower.关键词
基准面旋回/浅水三角洲/成因砂体/发育规律/扶余油田/松辽盆地Key words
base-level cycle/shallow-water delta/genetic sandbodies/development regularity/Fuyu Oilfield/Songliao Basin分类
天文与地球科学引用本文复制引用
赖洪飞,吴煜潇,宋健,何陵沅,秦智,王洪君,郑锡,林艳波,鲍志东,李美俊,张云龙,张莉..高频基准面旋回控制下浅水三角洲及其砂体发育模式:以松辽盆地扶余油田白垩系泉头组为例[J].古地理学报,2017,19(4):609-622,14.基金项目
“十二五”国家科技重大专项(编号:2011ZX05004-004)资助.[Financially supported by the National Science and Technology Major Project of the 12th Five-Year Plan(No.2011ZX05004-004)] （编号:2011ZX05004-004）
