特低渗透油藏面积井网见水时间计算

计算物理 ›› 2016, Vol. 33 ›› Issue (2): 190-196.

特低渗透油藏面积井网见水时间计算

何聪鸽¹, 范子菲¹, 许安著¹, 方思冬², 李博凯²

1. 中国石油勘探开发研究院, 北京 100083;
2. 中国石油大学(北京), 北京 102249

收稿日期:2015-01-22 修回日期:2015-07-15 出版日期:2016-03-25 发布日期:2016-03-25
作者简介:何聪鸽(1988-),男,博士生,主要从事渗流力学及油藏工程研究,E-mail:hecongge1988@163.com
基金资助:
“大型油气田及煤层气开发”国家科技攻关计划基金（2011ZX05044）资助项目

Calculation of Water Breakthrough Time in Well Patterns of Ultra-low Permeability Reservoir

HE Congge¹, FAN Zifei¹, XU Anzhu¹, FANG Sidong², LI Bokai²

1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;
2. China University of Petroleum-Beijing, Beijing 102249, China

Received:2015-01-22 Revised:2015-07-15 Online:2016-03-25 Published:2016-03-25

摘要/Abstract

摘要： 特低渗透油藏在水驱开发过程中常表现出渗透率各向异性和流体非达西渗流特征，运用非达西渗流公式及流线积分法，得到特低渗透油藏五点井网、反九点井网和菱形反九点井网在油水两相非活塞式驱替条件下的油井见水时间.计算长庆鄂尔多斯盆地某特低渗透油藏井网见水时间，结果与实际动态符合较好.分析油水黏度比、渗透率各向异性及启动压力梯度对油井见水时间的影响，结果表明：油水黏度比越大，油井的见水时间越早；当菱形反九点井网长轴方向井距与短轴方向井距之比与渗透率各向异性强度大致相等时，长轴方向与短轴方向上的角井能实现均衡驱替；启动压力梯度延缓了油井的见水时间，且生产井距越大，启动压力梯度的影响越显著.

关键词: 非达西渗流, 见水时间, 非活塞驱替, 启动压力梯度, 面积井网

Abstract: As ultra-low permeability reservoir is developed by water flooding,it always presents characteristics of non-Darcy flow and permeability anisotropy. We derived water breakthrough time formula of five-spot well pattern,inverted nine-spot well pattern and rhombic nine-spot well pattern with basic non-Darcy flow formula and streamline integral method. Breakthrough time of one actual well pattern in Ordos Basin was calculated. Calculation results accorded with production data well. Effects of threshold pressure gradient, permeability anisotropy and viscosity difference between oil and water were analyzed. It shows that the greater the viscosity ratio of oil and water,the earlier the water breakthrough time; Corner well of rhombic nine-spot well pattern can realize uniform displacement both in x direction and y direction as ratio of well spacing in x direction and y direction equals to permeability anisotropy degree; The grenter the threshold pressure gradient,the latter the water breakthrough time. Effect of threshold pressure gradient became more apparent as well spacing is larger.

Key words: nonlinear flow, water breakthrough time, non-piston displacement, threshold pressure gradient, areal well pattern

中图分类号:

TE348

何聪鸽, 范子菲, 许安著, 方思冬, 李博凯. 特低渗透油藏面积井网见水时间计算[J]. 计算物理, 2016, 33(2): 190-196.

HE Congge, FAN Zifei, XU Anzhu, FANG Sidong, LI Bokai. Calculation of Water Breakthrough Time in Well Patterns of Ultra-low Permeability Reservoir[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2016, 33(2): 190-196.

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