Patent ID: 7878268

Claim:
A system for performing a drilling operation for an oilfield, comprising: a drilling system for advancing a drilling tool into a subterranean formation; a repository storing: a plurality of survey factors for at least one wellsite of the oilfield and a plurality of drilling factors corresponding to at least one section of a planned trajectory of the at least one wellsite, wherein the plurality of survey factors comprises analog well data for a plurality of analog wells and offset well data for a plurality of offset wells; and a processor and memory storing instructions when executed by the processor comprising functionality to: identify an offset well of the plurality of offset wells, the offset well drilled close to the at least one wellsite to obtain a first portion of well data of the offset well data; identify an analog well of the plurality of analog wells based on the plurality of survey factors and the plurality of drilling factors, the analog well comprising a similar condition as the at least one wellsite, wherein the similar condition is related to one selected from a group consisting of lithology, formation structure, equipment used, basic geometry, and well type of the at least one wellsite; obtain the first portion of well data associated with the offset well; obtain a second portion of well data from the analog well data associated with the analog well; configure a drilling model for each of the at least one wellsite based on the plurality of survey factors, the plurality of drilling factors, the first portion of well data, and the second portion of well data; and selectively adjust the drilling model with respect to a plurality of drilling scenarios to generate an optimal drilling plan.