Sensitivity-based upscaling for history matching of reservoir models

作     者：Saad Mehmood Abeeb A.Awotunde 

作者机构：United Energy Pakistan Bahria Complex-l M.T. Khan Road Karachi 74000 Sindh Pakistan Department of Petroleum Engineering King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2016年第13卷第3期

页      面：517-531页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：the support received from King Fahd University of Petroleum & Minerals through the DSR research Grant IN111046 

主　　题：Upscaling Inverse analysis History matching Sensitivity Wavelets 

摘      要：Simulation of reservoir flow processes at the finest scale is computationally expensive and in some cases ***,upscaling of several fine-scale grid blocks into fewer coarse-scale grids has become an integral part of reservoir simulation for most *** is because as the number of grid blocks increases,the number of flow equations increases and this increases,in large proportion,the time required for solving flow *** we can adopt parallel computation to share the load,a large number of grid blocks still pose significant computational ***,upscaling acts as a bridge between the reservoir scale and the simulation *** as the upscaling ratio is increased,the accuracy of the numerical simulation is reduced;hence,there is a need to keep a balance between the *** this work,we present a sensitivity-based upscaling technique that is applicable during history *** method involves partial homogenization of the reservoir model based on the model reduction pattern obtained from analysis of the sensitivity *** technique is based on wavelet transformation and reduction of the data and model spaces as presented in the 2Dwp-wk *** the 2Dwp-wk approach,a set of wavelets of measured data is first selected and then a reduced model space composed of important wavelets is gradually built during the first few iterations of nonlinear *** building of the reduced model space is done by thresholding the full wavelet sensitivity *** pattern of permeability distribution in the reservoir resulting from the thresholding of the full wavelet sensitivity matrix is used to determine the neighboring grids that are *** essence,neighboring grid blocks having the same permeability values due to model space reduction are combined into a single grid block in the simulation model,thus integrating upscaling with wavelet multiscale inverse *** apply the method to estimate the parameters