| 摘要 |
A method of subsurface exploration which involves providing an observed geophysical data set 200 and a predicted geophysical data set 201 using a subsurface model. Objective function(s) are provided 204 which measure the similarity and/or dis-similarity between the two datasets. Then, the subsurface model is iteratively modified 214 to minimise or maximise the objective functions. The iterative steps modify a subsurface model to produce an updated subsurface model and comprise: defining one or more directed paths through a subsurface model, the or each directed path being defined with respect to a spatial geometry of the subsurface model; defining control(s) on the modifications to the model, wherein the control(s) are operable to control the total amount by which at least one function of the model coefficients of the subsurface model and/or updated subsurface model increases or decreases in the direction of one or more of the directed paths, wherein the defined controls are asymmetric such that, for a given directed path, the controls are different in opposite directions along the given path; and updating the subsurface model utilising the asymmetric controls. An updated subsurface model of a portion of the Earth for subsurface exploration is then provided. |
