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  4. Northwest Mcgregor Field CO2 Huff n Puff: A Case Study of the Application of Field Monitoring and Modeling Techniques for CO2 Prediction and Accounting (1)
September 01, 2010 GHGT | Abstract

Northwest Mcgregor Field CO2 Huff n Puff: A Case Study of the Application of Field Monitoring and Modeling Techniques for CO2 Prediction and Accounting

The Plains CO2 Reduction (PCOR) Partnership has conducted field and laboratory activities to determine the effects of injecting carbon dioxide (CO2) into an oil field in the United States portion of the Williston Basin. These activities were conducted as part of Phase II of the U.S. Department of Energy's Regional Carbon Sequestration Partnership program. The purpose of the activities was to evaluate the potential dual purpose of CO2 storage and enhanced oil recovery (EOR) in carbonate rocks deeper than 2440 m. Activities were conducted to 1) establish the baseline geological characteristics of the injection site, 2) determine the effect that CO2 has on the ability of the oil reservoir to store CO2 and produce incremental oil, and 3) evaluate the ability of Schlumberger's Reservoir Saturation Tool (RST) and Vertical Seismic Profile (VSP) technologies to detect a small-volume CO2 plume in deep carbonate reservoirs. While the CO2-based EOR operations at the Weyburn and Midale fields in Saskatchewan, Canada, are good examples of economically and technically successful injection of CO2 for simultaneous EOR and sequestration, the depths of injection in those fields are relatively shallow (ca. 1400 m) and not necessarily representative of many large Williston Basin oil fields. One of the primary goals of the PCOR Partnership Phase II Williston Basin Field Validation Test was to evaluate the effectiveness of CO2 for EOR and sequestration in oil fields at depths greater than 2440 m. To achieve that goal, a CO2 huff 'n' puff (HnP) test was conducted on a well that is currently producing oil from the Mission Canyon Formation at a depth of approximately 2454 m in the Northwest McGregor oil field in Williams County, North Dakota. During the test, 440 tons of CO2 was injected into a single well and allowed to "soak" for 2 weeks, after which the well was put ba

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Event/Meeting Information

10th International Conference on Greenhouse Gas Technologies (GHGT-10)
9/23/2010
Amsterdam,