Patent ID: 7941307
Filing Date: 2011-05-10
Classification: E21B

Abstract:
1. A method for producing a substantially calibrated numerical model, which can be used for calculating a stress on any point in a formation, the method comprising: a. predetermining a number, n, of strata suitable for modeling the formation, wherein n=a whole integer≧1 and s b. predetermining for each s c. obtaining stress calibration data L d. predetermining at least one set, i, of values comprising a burial Poisson ratio corresponding to each s e. predetermining at least a 1 f. using at least each of the GL g. producing from each FSA h. comparing each SP i. determining a degree of deviation, D j. obtaining a first substantially calibrated numerical model incorporating each modeled formation-stress analysis and modeled stress profile, the first model having degree of deviation D k. predetermining, a second set of burial Poisson ratio values under element (d) wherein for i=2, v l. performing the stress analysis of element (f) using at least each of the GL m. producing from the FSA n. determining a second degree of deviation, D o. obtaining the second substantially calibrated numerical model incorporating each modeled formation-stress analysis and modeled stress profile, the second model having degree of deviation D