摘要
针对S油田T块特高含水后期纵向干扰严重、平面井网不完善及驱替不均衡等问题,根据油藏工程理论和数理优化方法,纵向上建立了以拟渗流阻力级差为主要指标的近阻组合优化方法,平面上建立了以平均含水饱和度方差最小化为目标函数的差异调控矢量井网和矢量注采优化方法。基于该优化方法,在矿场试验中提出了纵向近阻组合优化、平面矢量井网及矢量注采优化的调整思路与对策。调整后,T块油藏采收率提高了3.2个百分点,现场应用效果显著,研究成果对特高含水后期油田的开发调整对策具有针对性较强的指导作用和借鉴意义。
Aiming at the problems of serious vertical interference,imperfect well pattern and unbalanced displacement in the ultra-high water cut stage in block T of S oilfield,a near resistance combination optimization method with pseudo seepage resistance parameter as the main index is established longitudinally according to reservoir engineering theory and mathematical optimization method.The vector well pattern of differential control and injection production optimization method with minimizing the variance of average water saturation as the objective function are established on the plane.Based on this optimization method,the adjustment ideas and countermeasures of vertical near resistance combination optimization,plane vector well pattern and vector injection production optimization are put forward in field test.After adjustment,the recovery rate of T block reservoir has been increased by more than 3.2%,and the field application effect is remarkable.The research results provide guidance and reference for the development and adjustment countermeasures of oil fields in ultra-high water cut stage.
作者
赖书敏
赵文佳
苏建
LAI Shumin;ZHAO Wenjia;SU Jian(Zhejiang Gas&Thermoelectricity Design Institute,Hangzhou,Zhejiang,310030,China;CNOOC China Ltd.,Tianjin Branch,Tianjin,300459,China)
出处
《天然气与石油》
2022年第3期56-61,共6页
Natural Gas and Oil
基金
中国石化股份公司科研项目“老油田潜力评价与规划优化方法研究及应用”(P20070-3)。
关键词
层系井网优化
注采调整
均衡驱替
特高含水后期
Optimization of well patterns
Injection production system adjustment
Equilibrium displacement
Ultra-high water cut stage
