%0 Journal Article %T 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*<br>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 %A 赖洪飞 %A 秦智 %A 王洪君 %A 郑锡 %A 林艳波 %A 鲍志东 %A 李美俊 %A 张云龙 %A 张莉 %A 吴煜潇 %A 宋健 %A 何陵沅 %J 电子科技大学学报 %D 2017 %R 10.7605/gdlxb.2017.04.047 %X 浅水三角洲储集层在陆相湖盆油气勘探中具有重要的意义,但基于密井网资料的精细研究仍十分缺乏。以高分辨率层序地层学和沉积学理论为指导,以松辽盆地扶余油田<em>DT91</em>区块白垩系泉头组四段第<em>Ⅲ</em>砂组<em>14</em>余口取心井的岩心资料和<em>700</em>余口密井网测井资料为对象,分析了高频基准面旋回下浅水三角洲及其砂体的发育规律。研究结果表明: (<em>1</em>)浅水三角洲储集层主要发育在河道、漫溢砂、分流砂坝、天然堤、决口扇和席状砂等<em>6</em>种成因砂体,以河道砂体和分流砂坝砂体为主。(<em>2</em>)在岩心和测井曲线上可识别出河道底部冲刷面、进积—退积作用面、退积—进积作用面和湖泛面等<em>4</em>种基准面旋回物理界面;并识别出<em>3</em>大类、<em>7</em>亚类超短期基准面旋回类型。(<em>3</em>)高频基准面旋回演化过程中,湖泊浅水三角洲沉积区可容空间变化不大,沉积物供给通量在可容空间增长速率(<em>accommodation increasing rate</em>,<em>A</em>)和沉积物供给通量(<em>sediment supply rate</em>,<em>S</em>)的比值<em>A/S</em>变化中起着主导作用,进而控制着成因砂体的数量和空间接触关系。当<em>A/S</em>值由小变大时,浅水三角洲的规模快速变小,成因砂体的数量也相应减少;同时,成因砂体垂向接触方式由下切叠加式→加积叠加式→孤立式变化,砂体平面分布的复合连片程度也发生由高到低的变化。<br>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 %K 基准面旋回 %K 浅水三角洲 %K 成因砂体 %K 发育规律 %K 扶余油田 %K 松辽盆地 %K < %K br> %U http://manu22.magtech.com.cn/gdlxb/CN/abstract/abstract9671.shtml