水驱油藏单井可采储量影响因素权重定量研究

Quantitative study of factors weight of single well recoverable reserves in water drive reservoir

可采储量是决定油气田开发是否经济可行的重要指标,影响单井可采储量的因素非常多,且这些因素之间相互影响、相互牵制,形成复杂的关系。综合运用多因素方差分析、正交试验设计、灰色关联以及层次分析等方法,对水驱油藏单井可采储量各因素的定量权重进行深入研究。研究结果表明,影响单井可采储量物质基础的因素权重最大,包括井距和有效厚度;其次是与单井可采储量关联关系较大的开发动态因素,包括初始产油量、初始含水率与开发时机;最后是影响水驱开发采收率的因素,包括非均质性等级、残余油饱和度、地层原油粘度和渗透率等。单井可采储量影响因素权重定量研究为单井可采储量定量预测模型的建立提供了重要的理论基础。

Recoverable reserves are an important indicator deciding whether it is economic and feasible for oil and gas field development.The factors influencing single well recoverable reserves are so many that these factors interact with each other,and form complex relationships.This paper comprehensively used orthogonal design,multi-factor variance analysis,gray relational method and the analytical hierarchy method to study the weight of factors influencing single well recoverable reserves in water drive reservoir.Research indicates that the largest weight factors are the material basis of single well recoverable reserves,including well spacing and effective thickness;moreover,dynamic development factors correlating greatly with single well recoverable reserves are secondly,including the initial oil production,initial water cut and the time to development;thirdly,the factors influencing oil recovery in water flooding are last,including heterogeneous level,residual oil saturation,underground oil viscosity,permeability and so on.The study of factors weight of single well recoverable reserves provides an important theoretical basis for quantitative predicting model of the single well recoverable reserves.