Inventors:
Dzevat Omeragic - Lexington MA, US
Tarek M. Habashy - Burlington MA, US
Valery Polyakov - Brookline MA, US
Raymond Kocian - Osprey FL, US
Yong-Hua Chen - Belmont MA, US
Sofia Davydycheva - Sugar Land TX, US
Raphael Altman - College Station TX, US
Carlos Maeso - Kuala Lumpur, MY
Douglas Hupp - Anchorage AK, US
International Classification:
G06G 7/48
Abstract:
Methods for three-dimensionally characterizing a reservoir while drilling a high angle or horizontal wellbore through the reservoir are disclosed. An initial reservoir model for the reservoir is selected and a section is extracted for a planned trajectory of the wellbore. A secondary model is generated by performing secondary modeling for at least part of the planned trajectory. An area of interest is identified within the secondary model where statistical uncertainty is high. Possible causes of the statistical uncertainty are identified for the area of interest within the secondary model that are not present or accounted for in the initial reservoir model. A set of parameters for the area of interest are defined at that are based on the possible causes of statistical uncertainty. The area of interest is logged with at least one logging while drilling LWD tool. Sensitivities of the LWD tool response to the subset of parameters are evaluated by performing at least one tertiary model for a range of the subset of parameters. The most sensitive parameters from the subset of parameters and corresponding measurements are identified. One or more real-time LWD measurements to be used for proactive well placement along the planned trajectory are identified and are based on the most sensitive parameters. The initial reservoir model is updated while drilling with information from the tertiary model. The model update is based on physics-based modeling or on inversion and on running multiple models and selection of a best candidate model based on correlations between the tool measurements and modeled results for each geologic model.