Abstract：We list the following latest developments in nonlinear inversion of seistnic trace:·Improved inversion algorithms,including the obtainment of analytic formula for estimating Jacobi matrix.·Discovering the advantage of nonlinear inversion,and the distinction between linear inversion and nonlinear inversion when they are used in solving special problem etc.·Researches on the method for improving resolution in and discovering the regularity of how iterative output sequence nonlinear iteration becomes chaotic.·In order to apply nonlinear inversion in reservoir search,people have accompushed various numerical experiments and applied the experimental results in real reservoir search,receiving satisfactory effect.
