Bob Westermark and June Schmeling. Grand Resources, Inc., Tulsa, Oklahoma [email protected]
This paper discusses the results of applying a multi-disciplinary approach to selecting horizontal-well candidates in 100-year-old Pennsylvanian oil fields in northeast Oklahoma and southeast Kansas. By combining a rigorous team effort that includes geological depositional interpretations, rock-mechanics evaluations, and reservoir-simulation studies with cost-effective drilling and completion technologies, Grand Resources, Inc. has drilled projects yielding economic success. The range of reservoir conditions where this approach has been applied is discussed, and the results of the various projects are candidly presented.
This series of
horizontal-well projects was based upon a grant received by the Department of
Energy (DOE) to conduct a field pilot test for a horizontal waterflood in a
Bartlesville sandstone reservoir. This project will be briefly reviewed (this
project has been the topic of several technical papers), with updated
production results. The other horizontal projects presented are the expansion
of the DOE pilot area in the Bartlesville sandstone in eastern Osage County,
Oklahoma, and two in the Tucker sandstone formation: one near Chanute, Kansas,
and the other just north of Tulsa, Oklahoma.
All of the projects have
utilized a short-radius rotary-steerable drilling system. All have been drilled
underbalanced, logged, and open-hole completed with pumping equipment placed in
the vertical section of the well. Open-hole logging through the short-radius
curve to the end of the lateral provides an excellent description of reservoir
properties, identifying high oil-saturation compartments and detecting the
presence and orientation of natural fractures.
AAPG Search and Discover Article #90067©2007 AAPG Mid-Continent Section Meeting, Wichita, Kansas