| US 7,359,844 B2 | ||
| Real time earth model for collaborative geosteering | ||
| Roger R. Sung, Dhahran (Saudi Arabia); and Kenneth A. Lewis, Dhahran (Saudi Arabia) | ||
| Assigned to Saudi Arabian Oil Company, Dhahran (Saudi Arabia) | ||
| Filed on Jan. 19, 2005, as Appl. No. 11/38,376. | ||
| Claims priority of provisional application 60/537595, filed on Jan. 20, 2004. | ||
| Prior Publication US 2005/0171698 A1, Aug. 04, 2005 | ||
| Int. Cl. G06G 7/48 (2006.01) | ||
| U.S. Cl. 703—10 [702/9; 702/11; 324/339] | 10 Claims |
| 1. A method of forming a model of subsurface earth formations as well drilling operations are proceeding through a wellbore
in the formations based on real time formation telemetry data sensed with a well drilling tool in the wellbore, comprising
the steps of:
storing in a computer memory existing models of the subsurface formations of interest and the stratigraphic locations of the
formations of interest;
receiving real time formation telemetry data measurements from the well drilling tool;
forming estimates in the computer of formation geologic attributes at the location of the well drilling tool in the wellbore
from the real time formation telemetry data while well drilling is proceeding in the wellbore;
comparing the computer estimates of formation geological attributes at the location of the well drilling tool in the wellbore
with at least one of the stored existing models of the subsurface formations to determine if a geologic indication of interest
and the location thereof in the formations differs from the at least one of the stored existing models;
if the geologic indication of interest differs from the at least one of the stored existing models with which it is compared,
generating a new model of the well based on the received real time formation telemetry data by performing the steps of updating
the structure grids of the formation of interest and substituting the updated structure grids for the structure grids of an
existing stored geologic model; and
providing a visible display of the generated new model of the well to guide the drilling operation.
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