Improved Oil Recovery in Fluvial Dominated Deltaic Reservoirs of Kansas: Near-211 Term

摘要

The objective of this project is to address waterflood problems of the type found211u001ein Morrow sandstone reservoirs in southwestern Kansas and in Cherokee Group 211u001ereservoirs in southeastern Kansas. Two demonstration sites operated by different 211u001eindependent oil operators are involved in this project. The Stewart Field is 211u001elocated in Finney County, Kansas and is operated by PetroSantander, Inc. Te 211u001eNelson Lease is located in Allen County, Kansas, in the N.E. Savonburg Field and 211u001eis operated by James E. Russell Petroleum, Inc. General topics to be addressed 211u001eare (1) reservoir management and performance evaluation, (2) waterflood 211u001eoptimization, and (3) the demonstration of recovery processes involving off-the-211u001eshelf technologies which can be used to enhance waterflood recovery, increase 211u001ereserves, and reduce the abandonment rate of these reservoir types. In the 211u001eStewart Project, the reservoir management portion of the project conducted during 211u001eBudget Period 1 involved performance evaluation. This included (1) reservoir 211u001echaracterization and the development of a reservoir database, (2) volumetric 211u001eanalysis to evaluate production performance, (3) reservoir modeling, (4) 211u001elaboratory work, (5) identification of operational problems, (6) identification 211u001eof unrecovered mobile oil and estimation of recovery factors, and (7) 211u001eidentification of the most efficient and economical recovery process. To 211u001eaccomplish these objectives the initial budget period was subdivided into three 211u001emajor tasks. The tasks were (1) geological and engineering analysis, (2) 211u001elaboratory testing, and (3) unitization. Due to the presence of different 211u001eoperators within the field, it was necessary to unitize the field in order to 211u001edemonstrate a field-wide improved recovery process. This work was completed and 211u001ethe project moved into Budget Period 2.