基于均衡驱替的多井干扰下产液量优化方法

Liquid producing capacity optimization method under multiwell interference based on equilibrium displacement

韩光明 代兆国 杨建雷 曹孟菁 闫建钊 刘海婴

HAN Guangming DAI Zhaoguo YANG Jianlei CAO Mengjing YAN Jianzhao LIU Haiying

承德石油高等专科学校 中国石化江汉石油工程有限公司井下测试公司 中国石油华北石油管理局苏里格项目部

Chengde Petroleum College, Chengde 067000, Hebei, China Downhole Testing Company, SINOPEC Jianghan Petroleum Engineering Co., Ltd., Wuhan 430048, Hubei, China Sulige Project Department, CNPC Huabei Petroleum Administration Bureau, Renqiu 062552, Hebei, China

为实现水驱油田多井干扰下均衡驱替，采用油藏数值模拟和实例验证方法，提出以驱替突破系数作为均衡驱替新标准，并将实际驱替分为油井水井均衡、油井不均衡但水井均衡、油井均衡但水井不均衡、油井水井不均衡4种模式，针对每种模式，研究建立了合理液量优化方法，通过注采调配，实现了多井干扰条件下均衡驱替。研究表明：驱替突破系数小于3时为均衡驱替，驱替突破系数大于3时为非均衡驱替，驱替突破系数介于3~14时为注采调配优化方法的最佳适用范围。研究结果为油水井配产配注提供了新的措施和思路。

Numerical reservoir simulation and case verification method were adopted to realize the equilibrium displacement under multiwell interference in waterflooding oilfields.It was proposed to take the displacement breakthrough coefficient as the new equilibrium displacement criterion.Actual displacement was divided into four models, i.e., equilibrium in oil and water wells, non-equilibrium in oil well but equilibrium in water well, equilibrium in oil well but non-equilibrium in water well, and non-equilibrium in oil and water wells.An optimization method of rational liquid producing capacity was researched and developed for each model.And equilibrium displacement under multiwall interference was ultimately realized by means of injection and production allocation.It is indicated that it is equilibrium displacement when the displacement breakthrough coefficient is lower than 3 and non-equilibrium displacement when the displacement breakthrough coefficient is higher than 3.When displacement breakthrough coefficient is between 3 and 14, the optimization method of injection and production allocation is in the optimal application range.The research results provide new measures and thoughts for injection and production allocation of oil and water wells.

10.13639/j.odpt.2017.02.023