断块油藏动态层系井网合理参数界限及应用——以东辛油区营17断块为例  

Reasonable parameter limits and applications of dynamic stratified well patterns in fault-block reservoirs——by taking Ying17 fault-block in Dongxin Oilfield as an example

作　　者：卢惠东 庞丽丽 薛巨丰 姚娜 聂法健 王艳平 LU Huidong;PANG Lili;XUE Jufeng;YAO Na;NIE Fajian;WANG Yanping(Dongxin Oil Production Plant of Shengli Oilfield Company,SINOPEC,Dongying 257000,Shandong,China;CCUS Project Department of Shengli Oilfield Company,SINOPEC,Dongying 257000,Shandong,China;School of Petroleum Engineering,Yangtze University,Wuhan 430100,Hubei,China)

机构地区：[1]中国石化胜利油田分公司东辛采油厂,山东东营257000 [2]中国石化胜利油田分公司CCUS项目部,山东东营257000 [3]长江大学石油工程学院,湖北武汉430100

出　　处：《石油地质与工程》2024年第1期84-89,共6页Petroleum Geology and Engineering

摘　　要：东辛油区营17断块受地质因素及开发现状影响,层间矛盾加大,平面干扰加剧,固有流线调控难度加大,亟需开展动态层系井网合理技术政策研究。依托数值模拟手段,通过多方案对比预测,明确分采分注中生产井合理层间级差控制在4以内、注水井同一层段内合理级差控制在4~6;对于高含水开发阶段中高渗油藏,井距为400 m时采收率最高;同一层段内注采比为1时,合理换层时机为3个月,随着注采比的增加,换层时间缩短;在矿场实践中,同一层段组合中尽量保持动态参数相近,开发效果也最好。该研究为完善提升技术、扩大应用规模奠定基础,以此技术政策界限为指导,在营17西单元持续开展上段调整应用,年度综合含水下降2.9个百分点,运行成本下降33元/t。研究成果对胜利油田断块储量的高效开发具有重要意义,同时也为胜利油田特高含水阶段效益稳产提供保障。Affected by geological factors and current development status,Ying17 fault-block in Dongxin Oilfield has increased interlayer contradictions,intensified plane interference,and increased difficulty in regulating the inherent flow line.Therefore,it's urgent to carry out research on reasonable technical policies for dynamic stratified well pattern.Based on numerical simulation methods,through comparison and prediction of multiple schemes,it's clear that the reasonable interlayer difference of production wells in separate production and injection is controlled within 4,and the reasonable interlayer difference of injection wells in the same interval is controlled within 4~6.For medium-high permeability reservoirs in the high water cut development stage,the highest recovery rate is achieved when the well spacing is 400 meters.When the injection-production ratio is 1 in the same interval,the reasonable interval changing time is 3 months,and the interval changing time decreases with the increase of injection-production ratio.It's better to keep the dynamic parameters as close as possible in the same interval combination for the best development effect in the field practice.This study lays a foundation for improving the technology and expanding the application scale.Guided by the technical policy boundary,the upper section adjustment and application will be carried out continuously in Ying17.The annual comprehensive water cut will decrease by 2.9% and the operating cost will decrease by 33 yuan/ton.The research results are of good value for the efficient development of fault-block reserves in Shengli Oilfield,and also provide a guarantee for the stable production of benefits in the ultra-high water cut stage of Shengli Oilfield.

关 键 词：动态层系井网 纵向差异组合 合理级差 井距 注采比 换层时机 

分 类 号：TE347[石油与天然气工程—油气田开发工程]