基于单因素解析多因素耦合的递减率计算方法

A method for calculating reduction rate based on single factor analysis and multifactor coupling

油田生产动态分析过程中,确定综合递减率主控因素是制定开发技术政策的重要依据。从综合递减率的定义出发,建立基于产量分解的区块年产量计算公式,提出影响阶段综合递减率变化的12个因素,形成综合递减率多因素耦合模型和主控因素确定方法。模型中提出利用井网完善程度、层间动用程度和附加阻力有效表征区块开发过程中平面和纵向上剩余油动用的不均衡性,客观反映油田开发实际,更准确地表征其对综合递减率的影响。该方法分析结果准确,可为油藏开发调整和油井措施的实施奠定基础。

In the process of oil field production dynamic analysis, it is an important basis to determine the controlling factors of comprehensive reduction rate. Based on the definition of the comprehensive reduction rate, an annual output calculation formula based on yield decomposition is established, and 12 factors that affect the change of the comprehensive reduction rate in the stage are put forward, to form a comprehensive reduction rate multi-factor coupling model and a main control factor determination method . In this model, we propose the use of well network perfection, interlayer utilization, and additional resistance to effectively represent the imbalance of the residual oil utilization in the plane and longitudinal direction during the development of the block, which can objectively reflect the actual oilfield development and more accurately represent their influence on the comprehensive reduction rate. The results of this method are accurate and can lay the foundation for oil reservoir development adjustment and oil well measure implementation.