摘要
海上多层稠油油藏由于存在启动压力梯度且纵向储层物性差异大,导致合采时层间矛盾突出,开发效果不理想。针对此问题,基于Buckley-Leverett理论,推导了考虑稠油启动压力梯度的多层油藏水驱油模型,建立了多层合采条件下产液量、渗流阻力、采出程度等指标的动态评价方法,并结合现场进行了应用。研究结果表明:渗流阻力的动态差异是导致多层油藏合采时层间矛盾的重要因素;采取分采措施更有利于纵向各储层的均衡开发。该成果对海上多层稠油油藏的后续高效开发调整具有指导作用。
Because of the start-up pressure gradient and the great difference of vertical reservoir physical properties in offshore multi-layer heavy oil reservoirs,the contradiction between layers is prominent,and the development effect is not ideal.Aiming at this problem,based on Buckley-Leverett theory,a water flooding model of multi-layer reservoir considering heavy oil start-up pressure gradient was derived,a dynamic evaluation method of fluid yield,seepage resistance and recovery degree under multi-layer combined production condition was established,and an application was carried out in the field.The results show that the dynamic difference of seepage resistance is an important factor leading to interlayer contradiction during combined production of multi-layer reservoirs;adopting separate production measures is more conducive to the balanced development of reservoirs.The research results have a guiding role for the subsequent high-efficiency development and adjustment of offshore multi-layer heavy oil reservoir.
作者
孙强
黄世军
李权
SUN Qiang;HUANG Shijun;LI Quan(Tianjin Branch of CNOOC Ltd.,Tianjin 300459,China;College of Petroleum Engineering,China University of Petroleum,Beijing 102249,China)
出处
《断块油气田》
CAS
CSCD
北大核心
2020年第3期323-326,共4页
Fault-Block Oil & Gas Field
基金
国家科技重大专项课题“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058-001)。
关键词
多层油藏
层间矛盾
启动压力梯度
渗流阻力
开发指标
multi-layer reservoir
interlayer contradiction
start-up pressure gradient
seepage resistance
development index
