Improved oil recovery in fluvial dominated deltaic reservoirs of Kansas -- near-term. Eighth quarterly report, April 1, 1995--June 30, 1995 Page: 3 of 9
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The objective of this project is to address waterflood problems of the type found in Cherokee
Group reservoirs in southeastern Kansas and in Morrow sandstone reservoirs in southwestern Kansas.
Two demonstration sites operated by different independent oil operators are involved in the project. The
Nelson Lease (an existing waterflood) is located in Allen County, Kansas in the N.E. Savonburg Field
and is operated by James E. Russell Petroleum, Inc. The Stewart Field (on latter stage of primary
production) is located in Finney County, Kansas and is operated by North American Resources Company.
General topics to be addressed will be 1) reservoir management and performance evaluation, 2)
waterflood optimization, and 3) the demonstration of recovery processes involving off-the-shelf
technologies which can be used to enhance waterflood recovery, increase reserves, and reduce the
abandonment rate of these reservoir types.
The reservoir management portion of the project will involve performance evaluation and will
include such work as 1) reservoir characterization and the development of a reservoir database, 2)
identification of operational problems, 3) identification of near wellbore problems, 4) identification of
unrecovered mobile oil and estimation of recovery factors, and 5) identification of the most efficient and
economical recovery process.
The waterflood optimization portion of the project involves only the Nelson Lease. It will be
based on the performance evaluation and will involve 1) design and implementation of a water cleanup
system for the waterflood, 2) application of well remedial work such as polymer gel treatments to improve
vertical sweep efficiency, and 3) changes in waterflood patterns to increase sweep efficiency.
Finally, it is planned to implement an improved recovery process on both field demonstration
Summary of Technical Progress
Savonburg Field Project
Task II.1 - Water Plant Development
Summary of work in last quarter
The water plant is working satisfactorily, however there are a few problems including, 1) probe
controls in both the raw water and clear water tanks were not functioning properly which also makes
transfer of water difficult, 2) barium sulfate is still precipitating out, 3) capacity of the single bag filter
is inadequate, and 4) power downtimes occurred due to the extreme weather.
The probes were replaced with floating ball devices, which appear to be operating satisfactorily.
The transfer pump was replaced with one using a larger motor. It was then determined that the capacity
of the 2" transfer line had been reduced by scaling. The transfer pump was switched back to the 4"
diameter transfer line and the bleach injection was restarted at that point. A larger overload unit was
installed for the transfer pump. The Murphy Hi-Low control for the injection pump was replaced.
The removal-of suspended oil and solids have been successful, however the dissolved barium has
caused a problem by the formation of a barium sulfate scale. The resulting scale is more difficult to
remove due to the absence of oil and other solids which in the past made the scale soft and removable.
Progress is being made in reducing the barium content of the produced water before combinations of the
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Green, D.W.; Willhite, G.P.; Walton, A.; Schoeling, L.; Reynolds, R.; Michnick, M. et al. Improved oil recovery in fluvial dominated deltaic reservoirs of Kansas -- near-term. Eighth quarterly report, April 1, 1995--June 30, 1995, report, July 15, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc794359/m1/3/: accessed March 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.