泌阳凹陷双河油田扇三角洲前缘构型精细解剖

Detailed reservoir architecture of fan-delta front in Shuanghe Oilfield, Biyang Depression

 姜建伟¹ 肖梦华² 王继鹏³ 胡书奎⁴

中国石化河南油田分公司科技处，河南 南阳 473132 中国石化河南油田分公司新疆采油厂，新疆 焉耆 841199 中国石油大学（北京）地球科学学院，北京 102249 中国石化河南油田分公司勘探开发研究院，河南 郑州 450043）

Research Institute of Exploration and Development, Henan Oilfield Company, SINOPEC, Nanyang 473132, China Xinjiang Oil Production Plant, Henan Oilfield Company, SINOPEC, Yanqi 841199, China College of Geosciences, China University of Petroleum, Beijing 102249, China Research Institute of Exploration and Development, Henan Oilfield Company, SINOPEC, Zhengzhou 450043, China)

 利用岩心、测井和生产动态资料，在扇三角洲前缘内部构型级次划分及识别单一河道砂的基础上，精细解剖泌阳凹陷双河油田Ⅶ10小层扇三角洲前缘的构型。双河油田扇三角洲前缘复合砂体主要发育水下分流河道、河口坝和溢岸砂3类构成单元，单一砂体构型界面为泥粉砂质夹层、钙质砂砾岩夹层以及泥砾岩夹层。研究区砂体的拼接样式分为河口坝￣河口坝拼接、河口坝￣辫状水道拼接、辫状水道￣辫状水道拼接以及辫状水道￣溢岸砂拼接等4种类型。应用三维视窗内多视角栅状组合技术在小层内识别出3条单一河道及其相应河口坝和溢岸砂，单一河道宽度为100～150 m，具有从北向南逐步交叉合并并分流的变化规律。油田现有的井网不能有效地控制单一河道砂体分布，需要缩小井距，沿单一河道完善注采系统，以提高注水开发效果。

 Based on the data of cores, well logging and dynamic production, architecture hierarchies re-division of fan-delta front, and single fluvial sand body identification, the reservoir architecture of fan-delta front of VII10 layer in Shuanghe Oilfield, Biyang Sag, is finely dissected. Underwater distributary channels, mouth bars, and overbank sands developed in the composite sand bodies of fan-delta front in Shuanghe Oilfield. And architecture boundaries of a single sand body are clay silty intercalations, calcium glutenite intercalations and muddy gravel intercalations. Stitching styles of single sand bodies present four types, i.e., a mouth bar stitching a mouth bar, a mouth bar stitching a braided channel, a braided channel stitching a braided channel, and a braided channel stitching an overbank sand body. Three single sand bodies and their corresponding mouth bars and overbank sands are identified in VII10 layer on the basis of multi-view palisade combination technology in 3D window. The single sand bodies, with width of 100￣150 meters, gradually merge and distribute from north to south. Since the existing well pattern cannot effectively control the distribution of a single channel sand body, it is necessary to reduce the well space and improve injection-production systems along a single channel to enhance the water flooding development effect.

10.6056/dkyqt201605004