Three-dimensional constrained inversion of full tensor gradiometer data based on cokriging method

As full tensor gradiometer (FTG) measurement techniques has increasingly become mature, three-dimensional inversion of FTG data is focused on more and more. Like inversion of gravity, inversion of FTG data confronts with multi-solution problem. In this paper, cokriging inversion equation is framed with several components with known densities as constrains. The method proposed can easily conclude the prior information, for example the known densities, into the inversion equation, so that non-uniqueness of inversion can be reduced. This method is tested on sythetic models and the inverted results show that the resolution, especially the vertical resolution of the resulted model can be significantly improved with the densities as constrains. The application of actual data obtained from a salt dome located in Texas proved the validity of the proposed method.