MATLAB数学软件在油藏工程模型参数求解中的应用

Application of MATLAB mathematics software in reservoir engineering model parameter determination

原油高压物性经验公式、产量递减分析中双曲递减模型、广义IPR曲线模型、油气田产量广义翁氏模型等油藏工程模型均涉及到参数求解的问题,为了寻求更为简单的参数求解方法,提出了应用MATLAB数学软件中的非线性回归函数nlinfit()求解模型参数的新方法,该方法非常简单,克服了目前各种确定模型参数方法的不足。实例分析表明,新方法的预测结果总体上优于文献中的预测结果,方便了油藏工程研究人员,具有一定的实际意义和应用价值。油藏工程领域内涉及到参数求解的问题均可用nlinfit()函数确定出模型参数。

The procedure of obtaining PVT properties correlation coefficients, hyperbolic decline equation coefficients, generalized IPR curve coefficients, generalized Weng cycle parameters by using MATLAB nonlinear regress function nlinfit （ ） has been presented. The procedure is very simple and overcome the shortcoming of the current methods. Finally the predicting results of new coefficients are compared to those of documents. The results show that the predicting results of new coefficients is superior to those of documents. Nonlinear regress problem can be solved by using nlinfit function in reservoir engineering domain.