Patent ID: 7663968

Claim:
A method of processing geological data on a processor during drilling of a borehole for improving the accuracy of the geological data, said method including steps: (a) determining from instrumentation ( 100 ) associated with one or more strings ( 50 ) of drilling pipes, one or more spatial trajectories of one or more boreholes ( 20 , 200 ) in a subterranean region; (b) determining from said one or more spatial trajectories, one or more points (P 1 , P 2 , P 3 ) with reference to said geological data, where the one or more trajectories change direction in one or more layers of strata (F) of said subterranean region by using a TVT %-D representation or a TST %-D representation for determining positions of said one or more points where said one or more trajectories change direction; (c) subdividing, on a processor one or more offset logs generated by said instrumentation ( 100 ) in response to said one or more points (P 1 , P 2 , P 3 ) to generate corresponding sections of offset log; (d) mutually comparing said subdivided sections of offset log to find a condition of best comparison therebetween and thereby generating one or more error terms (E); and (e) in response to the one or more error terms (E), updating the geological data to improve its accuracy.