Method of processing geological data

Abstract

There is provided a method of processing geological data during drilling of a borehole for improving accuracy of the geological data. The method includes a first step of determining from instrumentation () associated with a string () of drilling pipes a spatial trajectory of a borehole () in a subterranean region. A second step of the method involves determining from the spatial trajectory one or more points (P, P, P) with reference to the geological data whereat the trajectory changes direction in one or more layers of strata (F) of the subterranean region. A third step of the method involves subdividing an offset log generated by the instrumentation () in response to the one or more points (P, P, P) to generate corresponding sections of offset log. A fourth step involves mutually comparing the subdivided sections of offset log to find a condition of best comparison therebetween and thereby generate one or more error terms (E). A fifth step involves, in response to the one or more error terms (E), updating the geological data to improve its accuracy. Beneficially, the method includes a sixth of repeating the second to fifth steps until the one or more error terms (E) are minimized. The method is relevant for a drilling rig () to enhance its drilling accuracy into the subterranean region.