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Green River Formation Water Flood Demonstration Project

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The objectives of the project were to understand the oil production mechanisms in the Monument Butte unit via reservoir characterization and reservoir simulations and to transfer the water flooding technology to similar units in the vicinity, particularly the Travis and the Boundary units. Comprehensive reservoir characterization and reservoir simulations of the Monument Butte, Travis and Boundary units were presented in the two published project yearly reports. The primary and the secondary production from the monument Butte unit were typical of oil production from an under saturated oil reservoir close to its bubble point. The water flood in the smaller Travis unit appeared affected by natural and possibly by large interconnecting hydraulic fractures. Water flooding the boundary unit was considered more complicated due to the presence of an oil water contact in one of the wells. The reservoir characterization activity in the project basically consisted of extraction and analysis of a full diameter core, Formation Micro Imaging (FMI) logs from several wells and Magnetic Resonance Imaging (MRI) logs from two wells. In addition, several side-wall cores were drilled and analyzed, oil samples from a number of wells were physically and chemically characterized (using high-temperature gas chromatography), oil-water relative permeability's were measured and pour points and cloud points of a few oil samples were determined. The reservoir modeling activity comprised of reservoir simulation of all the three units at different scales and near wellbore modeling of the wax precipitation effects. Core analyses and examination of the results of the FMI logs were the principle tools utilized for the geologic characterization of the unit. Oil production from most units in the region is from multiple, largely distinct sand bodies. The geologic study identified the Lower Douglas Creek reservoir (which contributed to most of the production in the Travis unit) to form isolated lenses that can reach over 100 feet of net thickness. Localized nature of this reservoir combined with lithologic heterogeneity and complex architecture makes this a difficult water-flood candidate. The Dl reservoir on the other hand, which contributed to over 2/3"1 of the production in Monument Butte, is laterally continuous and lithologically homogeneous. The reservoir characterization efforts identified new reservoirs in the Travis and the Boundary units. The reservoir simulation activities established the extent of pressurization of the sections of the reservoirs in the immediate vicinity of the Monument Butte unit. This resulted in a major expansion of the unit and the production from this expanded unit increased from about 300 barrels per day to about 2000 barrels per day. The technology transfer component of the project was very successful. Ten technical papers and presentations resulted as a direct consequence of this project. Several new water floods were begun in the Greater Monument Butte region, modeled essentially after the Lomaflnland Monument Butte flood.

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Last Updated September 29, 2016, 14:26 (LMT)
Created September 29, 2016, 14:26 (LMT)
Citation Bill I. Pennington, John E. Dyer, John D. Lomax, Milind D. Deo ---- Roy Long, Green River Formation Water Flood Demonstration Project, 2016-09-29, https://edx.netl.doe.gov/dataset/green-river-formation-water-flood-demonstration-project0
Netl Product yes
Poc Email Roy.long@netl.doe.gov
Point Of Contact Roy Long
Program Or Project KMD
Publication Date 1996-11-1