大庆石油地质与开发2026，Vol.45Issue(5)：70-79,10.DOI:10.19597/J.ISSN.1000-3754.202509062
高含水油藏不稳定注水提高采收率技术及其影响因素
Unsteady water flooding EOR technology and its influencing factors for high water-cut reservoirs
摘要
Abstract
In order to solve the problems of aggravated ineffective water cycling and decreased displacement efficien-cy encountered in continuous water injection during high water-cut development stage of oilfields,based on the pressure diffusion equation model,multiphase elastic energy storage model and multi-field coupling mathematical model,a numerical simulation software integrating multi-field coupling effects is developed to study unsteady water flooding for enhanced oil recovery(EOR).The results show that,unsteady water flooding is proposed herein to break oil-water balance through dynamic pressure gradients generated by pressure fluctuations,while elastic force provides additional driving force via an energy storage-release cycle.Static factors influencing the recovery of unsta-ble water flooding are reservoir heterogeneity and natural water body energy,while dynamic factors include pres-sure fluctuation amplitude,injection-production half-cycle duration,and injection-production alternation mode.For high water-cut complex fluvial heavy oil reservoir in Q Oilfield,the optimized scheme involves a pressure fluctu-ation amplitude of 10%of the original pressure,an injection-production half-cycle of 90 days,and an asynchronous injection-production pattern between oil and water wells,with daily oil production increased by 11.5-14.6 m3 per well pattern.The research provides reliable theory and technology for EOR in high water-cut mature oilfields.关键词
高含水/不稳定注水/提高采收率/数值模拟/剩余油挖潜/流固耦合Key words
high water cut/unsteady water flooding/enhanced oil recovery/numerical simulation/remaining oil potential tapping/fluid-solid coupling分类
能源科技引用本文复制引用
梁潇,姜毅,暴赫,李景玲,王迪..高含水油藏不稳定注水提高采收率技术及其影响因素[J].大庆石油地质与开发,2026,45(5):70-79,10.基金项目
中国海洋石油有限公司"十四五"重大科技项目子课题"油气生产智能化技术——智能注采技术"(KJGG-2022-15-0303). （KJGG-2022-15-0303）
