计算机辅助自动历史拟合在油藏数值模拟中的应用  

Applying computer-aided history matching to the numerical simulation of reservoirs

作　　者：邓宝荣[1] 袁士义[1] 李建芳[1] 雷颖华[1] 路勇 

机构地区：[1]中国石油勘探开发研究院

出　　处：《石油勘探与开发》2003年第1期71-74,共4页Petroleum Exploration and Development

摘　　要：油藏数值模拟的历史拟合既复杂又费时、费力 ,而且多解。通过对计算机辅助历史拟合技术进行研究 ,给出了一种较为实用可靠的实现方案 :①利用商业化的黑油模型计算结果 ,构造历史拟合目标函数 (也适用于其它模拟器 ) ;②采用Levenberg Marquardt优化算法求解极小化目标函数 ,并根据牛顿法、最速下降法、Levenberg Marquardt算法各自的特点进行灵活的算法切换 ,提高收敛性和收敛速度 ;③利用协方差矩阵和均方根梯度 ,进行参数的不确定度和敏感性分析。数值模拟试验表明 ,设计的计算机辅助历史拟合方法可行、可靠 ,能够大大减少人工历史拟合的盲目性和所花费的机时。图 4表 1参The research of computer-aided history matching is presented in this paper. The authors give a practical and reliable implementation aimed at solving the problems of complexity and multi-solution in manual history matching. Optimization method discussed in this paper including setting up objective function, and reasonably selecting optimization parameters to rapidly match history performance index has been implemented in the fully implicit, 3-dimensional, 3-phase black-oil reservoir simulator Levenberg-Marquardt idea, which has the advantages both in Gauss-Newton and steepest descent, is used to minimize an objective function that measures the difference between the simulated and the observed field data in this paper. Rms-gradients and the covariance matrix are also computed in this paper for analyzing the sensitivities of parameters and quickly identifying those parameters, which are really important for a match. This paper presents the application of the computer-aided history-matching tool to two tests. It shows that the calculation of Rms-gradients is correct and the optimization method adopted is feasible, and the result of matching is good. Another test is carried out on a 3-D 3-phase field case in real industrial conditions. The best result was also obtained. It was demonstrated that the computer-aided history-matching tool could identify the reservoir parameters that had significant effect on the observed data and reduce computation time significantly.

关 键 词：计算机辅助自动历史拟合 油藏 数值模拟 应用 优化算法 敏感性分析 

分 类 号：TE319[石油与天然气工程—油气田开发工程]