Kansas Geological Survey
Open-file Report 2001-38
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Kansas Geological Survey Open-file Report 2001-38 |
To develop geologic and petrophysical reservoir model for Lansing-Kansas City carbonate reservoir in Central Kansas for numerical reservoir simulation. This simulation is in preparation for CO2 miscible flood demonstration project.
Primary and secondary production phases of the seventy-year old Hall-Gurney Field are near completion, however a third development phase could be spurred by a U.S. Department of Energy sponsored Class II carbon dioxide miscible flood demonstration project. The CO2 target reservoirs, Pennsylvanian Lansing-Kansas City (L-KC) Groups, have yielded 90 MMBO of the 155 MMBO cumulative production in the multi-pay field. Primary production, begun in1931, was followed by extensive waterflooding in the 50's and 60's. Waterfloods reached their economic limits in the 70's and 80's but bi-passed oil represents a significant resource for CO2 miscible flooding, a third development phase.
Reservoir rocks were deposited as coarse-grained ooid sands in shallowing upward fourth order sequences and concentrated on bathymetric highs on the broad Kansas shelf. Subaerial exposure and meteoric water percolation caused ooid dissolution and resulted in oomoldic grainstones. Modern wireline logs and core data from a recently drilled CO2 injection well validate early general reservoir models based on data typical of mid-century development, but also show previously unrecognized reservoir complexity. Detailed reservoir characterization of the 12-18 foot CO2 target zone at the demonstration site indicates the presence of up to three stacked, shallowing-upward cycles contained within a single higher-order shallowing-upward sequence accompanied by vertically increasing porosity and permeability.
In Kansas the L-KC has produced 1.2 billion BO primarily from oomoldic grainstones in 3,500 fields. This case study of a mature field entering its third development phase provides insight into oomoldic limestone reservoirs both in Kansas and worldwide.
Many Kansas oil fields are poised for their third phase of development. The $5.4 million CO2 miscible flood demonstration project represents the first use of CO2 for enhanced oil recovery in Kansas and the goal is to demonstrate the technical feasibility of the process in a major Kansas reservoir. The Hall-Gurney Field, the largest L-KC oil field in Kansas, is one of several CO2 flood candidate fields in central Kansas. Partners in the project include the U.S. Department of Energy, MV Energy LLC, Kinder-Morgan CO2, ICM, Inc., the University of Kansas (Kansas Geological Survey and Tertiary Oil Recovery Project) and the Kansas Department of Commerce.
We wish to acknowledge the U.S. Department of Energy for support of this work under the Class Revisited Program Contract # DE-AC26-00BC15124. Project Manager - Daniel Ferguson.
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Last updated November 2001
http://www.kgs.ku.edu/PRS/publication/OFR2001-38/index.html