带隔板的底水油藏水平井水脊高度计算  

Calculation of water cresting height for horizontal well in bottom water reservoir with interlayer

作　　者：胡平 卞德智[1] 范子菲 刘欣颖[3] 程林松 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石化国际石油勘探开发公司,北京100083 [3]中国石油天然气勘探开发公司,北京100034 [4]中国石油大学(北京)石油工程学院,北京102249

出　　处：《东北石油大学学报》2018年第1期103-111,共9页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2008ZX05028);中国石油化工集团科技攻关项目(JP08014)

摘　　要：在水平井开采含夹层底水油藏物理实验的基础上,观察水脊形态变化及水淹规律,抽象出带隔板底水油藏水平井的物理模型。将物理模型划分为3个区,以多孔介质渗流理论为基础,利用镜像反映法和势的叠加原理,建立任一时刻水脊高度的计算模型,并根据物理实验得到的油井见水时水质点的运动路径对油井的见水时间进行预测,对见水时间影响因素进行分析。结果表明:水脊上升速度随时间的变化逐渐减缓;在隔板边缘下方处及水平井井底附近,水脊上升速度随时间变化较其余位置快,并且水脊高度在平面上的变化幅度也较大;随着隔板半径的增大及隔板与井的垂直距离增加,见水时间明显延后;见水时间随着水平井产量的增加而缩短。计算的水脊高度变化规律与物理实验相互验证,见水时间与实际误差约为4.9%,可为该类油藏开发提供参考。Based on physical experiment on horizontal well in developing bottom water reservoir with in-terlayer,this paper observes water cresting morphological change and water flooding pattern,from which the physical model of horizontal well in bottom water reservoir with a interlayer is abstracted from.This paper divides the physical model into three zones,and based on porous media seepage theory,makes full use of the potential superposition and mirror image theory,establishes the calculation model of water cresting height at any moment,utilizes water movement path through physical experiment to predict water breakthrough time,and analyzes the influencing factors.The results show that:the rising rate of cresting gradually slows with time increases;both in the below close of interlayer and horizontal well,the rising rate of cresting is faster than other locations,and cresting height changes a lot;water breakthrough time delays with increase in interlayer scale and vertical distance away from horizontal well;water breakthrough time gets shorter with increase in well production.Through mutual verification between the calculation of water cresting height change and physical experiment,the water breakthrough time and the actual poses an error rate of about 4.9%,which can provide reference for the development of this type of reservoir.

关 键 词：底水油藏 隔板 水平井 物理实验 水脊高度 见水时间 

分 类 号：TE342[石油与天然气工程—油气田开发工程]