底水油藏含水上升规律研究——以Y2油藏西北区为例  

The Study on the Bottom Water Reservoir Water Cut Rising Characteristics——Take the Northwest Block of Y2 Reservoir as an Example

作　　者：张辉 彭小东 刘鑫 段策 李军 李正健 

机构地区：[1]中海石油(中国)有限公司湛江分公司,湛江524057 [2]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《科学技术与工程》2012年第35期9470-9474,9479,共6页Science Technology and Engineering

基　　金：国家十二五重大专项(2011ZX05014-004-004HX)资助

摘　　要：Y2油藏西北区为底水油藏,开采效果差。研究含水上升规律对于改善该油藏的开发效果有重要的作用。首先通过实际的含水率曲线与相渗计算的理论含水率曲线对比发现,实际的含水上升速度远大于相渗计算的理论含水上升速度。单井含水率曲线主要表现为凸型。根据产油量和含水率的变化,分三类对单井的含水上升规律进行了讨论,并分析了每类的原因。最后在单井含水上升分析的基础上,分析了油藏整体的含水率曲线出现台阶状的原因。该油藏底水锥进严重,剩余油主要是富集在注采井间,因此,可考虑水平井技术用于该油藏的深度挖潜。The northwest block of Y2 reservoir is a bottom water reservoir, Its exploitation effect is very poor. The study on the water cut rising characteristic have an important role for improving the development of the reservoir effect. It fund that the actual water rising velocity is far outweigh the relative permeability calculation theory water cut up speed, through the contrast with the actual water cut curve and relative permeability calculation theoretic wa- ter cut curve. The single well water cut curve is mainly for convex. According to the change of yield and water cut, the single well water cut curve is divided into three types to discusse. And the reason of each type is analyzed. Fi- nally, on the basis of the analysis of the single well water cut up, the reason of the water cut of the reservoir as a whole to be a step-like is analyzed. The reservoir bottom water coning is serious. The remaining oil is mainly con- centrated between the injection-production pattems. Therefore, the horizontal well technology for tapping potentiali- ties of the reservoir can be considered.

关 键 词：底水油藏 含水率 含水上升规律 底水锥进 

分 类 号：TE122.112[石油与天然气工程—油气勘探]