the computer 38 can be implemented utilizing the computer program steps of fig6 stored in memory 42 and executable by system processor of computer 38 and also the data resulting from the other steps of fig2 not implemented by the computer 38 such data is furnished to computer 38 through any suitable form of computer data input device as shown in the flow chart f several existing estimates of the subsurface formations and their location in the form of one or more of proposed well plan data 50 existing geological model data 52 and a current interpretation 54 of the well being drilled are available for comparison and use during according to the present invention the proposed well plan data 50 represents a planned or estimated well trajectory through subsurface earth formations in three dimensional space before drilling of the well in question actually begins the existing geological model data 52 is continually updated during the process of the present invention the existing geological model data 52 contains at any time during processing according to the present invention the most recent three dimensional model of geological attributes processing results at the present moment in time during a drilling operation the current interpretation data 54 is also continuously updated during the process of the present invention the current interpretation data 54 at any time during the process of the present invention contains the most recent geological and geophysical interpretation at that time of a subsurface reservoir of interest the existing estimates are stored in either the data records 32 or other suitable data memory associated with the computer 38 real time telemetry data from in.