埕岛油田馆陶组高含水期优势流动通道识别与应用

Identification and application of dominant flow channels in Guantao formation of Chengdao oilfield during high water cut stage

河流相沉积的砂岩油藏注水开发进入了高含水期,平面、层面矛盾进一步凸显,水驱效果差,识别和治理优势流动通道是开发中急需解决的问题。以埕岛油田主体馆陶组中一区油藏为例,综合采用指标计算法、吸水产液图版法、动态分析等方法对优势流动通道进行研究,形成了一套快速识别优势流动通道的综合评价方法;在流动通道识别基础上,明确调整方向,采取油水井两端并重的"提、控、引"治理措施,引导地下流场扩大波及面积,均衡流场,取得了良好的现场应用效果,对指导下步馆陶组注水开发具有重要的意义。

Fluvial sandstone reservoir is in high water cut stage,both plane and level contradiction are further highlighted,water drive results are become worse and worse. The urgent problems in reservoir exploitation are how to identify and block off dominant flow channels. By taking the reservoir in the first section of Guantao formation,Chengdao oilfield as an example,a set of comprehensive evaluation methods for rapid identification of dominant flow channels were formed by means of index calculation method,water absorption and liquid production chart method,and dynamic analysis. On the basis of channels identification,the adjustment direction is indicated. Increase the production and injection of the wells in non-dominant channels,and decrease the production and injection of the wells in dominant channels. The underground flow field will be balanced by expanding swept area. Good field application effect has been achieved and it is of great significance for the further waterflooding development of Guantao formation.