生产测井确定地层参数的最优化解释方法

Optimum Interpretation Method for Determining Reservoir Parameters in Production Logging

油田现场动态监测中,常规方法无法确定子层动态参数。生产测井仪器一次下井可同时测得流量、压力、密度、持水率等资料。提出利用生产测井资料结合渗流理论和复形调优最优化方法,确定油藏动态参数。利用生产测井测量的流体压力和分层流量,建立带约束条件的非线性目标函数,进行求解确定地层的渗透率、表皮系数和压力参数。介绍复形调优法的原理及实现方法。对W1井的实际应用表明该方法的处理结果准确可靠。

Traditional logging methods can not measure subqayer dynamic parameters in the on site dynamic monitoring of oilfield. Production logging tools can measure flow rate, pressure, density, water holdup and other parameters simultaneously. Provided is the method to determine reservoir dynamic parameters by eombining production logging data, seepage method, and opti- mizing by plural modality method. Formation permeability, skin coefficient and pressure parame- ter are gotten by solving nonlinear objective function with bound, which established on the basis of fluid pressure and sub-layer flow rate from production logs. Introduced are the principle and realization method of optimizing by plural modality method and its practical application.