待钻井地层孔隙流体渗流速度预测模型及应用

在密井网条件下,地层孔隙流体渗流速度是影响固井质量主要因素之一,如何准确预测地层孔隙流体渗流速度,正确分析固井质量优劣的原因,一直是许多油田面临的主要问题.为了能更准确地预测待钻井地层孔隙流体渗流速度,保证固井质量,根据物质平衡原理、油层任一半径对应的封闭流经面积所通过的流量不变理论、多井作用于任一点（待钻井点）的渗流速度为各相关井单独作用于这一点的渗流速度之和的原理,建立了待钻井地层孔隙流体渗流速度预测的数学模型.模型包括单井作用、多井干扰和受断层影响井情况,应用该模型对大庆油田待钻井地层孔隙流体渗流速度进行了预测,结果表明,该方法能准确预测待钻井地层孔隙流体渗流速度,预测准确率可达94.8%.

Forecasting Model on Darcy Velocity of Formation Pore Fluid of Impending Drilling Well and Its Field Application

The Darcy velocity of formation pore fluid is a key factor of cementing quality under the condition of dense well pattern.How to forecast Darcy velocity of formation pore fluid and how to identified influential factors of cementing quality exactly always were many oil fields' challenges.The forecasting model on Darcy velocity of formation pore fluid was developed based on the law of conservation of matter,the constant current supply theory of any radius of reservoir corresponding confining flow area and the additivity law of Darcy velocity.Single well pattern,multi well interference pattern and fault related pattern were all considered in the mathematical model.It can be seen from the forecasting data on the Darcy velocity of formation pore fluid of some future wells that the forecasting model has a better accuracy and the precision ratio can reach 94.8%.