In practical, a log interesting inversion can be identified as a nonlinear multiparameter optimization problem.The objective function has a complex topography with many local minima.

• 实际中的测井参数反演是一个多参数、非线性优化问题，所采用的目标函数，即度量由参数化的理论模型得出的预测值与观测值的吻合程度，往往存在多解的现象。