March 20, 2017
MRCSP Field Program Achieves Key Milestone with Characterization and Baseline Monitoring in a New EOR Field in Michigan
The MRCSP research team completed a milestone in February when operations associated with drilling, characterization, and completion were finished for two new wells, an injection well and a monitoring well. Operations supporting this MRCSP research in this new field began in November 2016 when the injection well was spudded in the depleted oil and gas reef being prepared for a carbon dioxide enhanced oil recovery. These wells are planned to be part of a carbon dioxide storage and enhanced oil recovery project which will use carbon dioxide to flood the reef, re-pressurize the oil bearing formations, and extract additional oil from this otherwise unproductive reef while permanently storing carbon dioxide. Achievement of this milestone is a key step towards MRCSP’s goal of monitoring at least 1 million tonnes of net injection.
In this depleted reef, the MRCSP program collected characterization data, including mudlogs, wireline logs, sidewall cores, whole core, and formation test data. This characterization data will be used to gain understanding of the geologic nature of the reef. The data will also contribute to geologic models that will be used as the basis for understanding the injection, production, and storage mechanisms and behavior as operations in the reef are underway.
MRCSP also installed monitoring equipment in the two new wells. A permanent fiber optic monitoring system using behind-casing fiber optic DTS (Distributed Temperature Sensing) and DAS (Distributed Acoustic Sensing) technology was installed in both the injection and monitoring wells. A multi-level pressure array was installed in the monitoring well to observe pressure changes in formation layers within the reef; the array was installed in tandem with the monitoring well’s fiber optic system. After the installation of the behind casing monitoring equipment, isolation scanner and magnetic flux cased hole wireline technology was used for advanced cement bond logging and to help map the equipment location as installed behind casing. This mapping will help prevent damage to the fiber optic during perforation of the wells for production. The DAS system in both wells was used to collected baseline seismic profiles in the reef, which can be compared with future seismic profiles to evaluate the efficacy of these seismic techniques for monitoring CO₂ migration. An additional part of the monitoring program - running a baseline pulsed neutron capture log - was also performed following the completion of each well to gain insight into the initial fluid saturation conditions within the reef. Following the baseline monitoring, our host company has started injection of CO₂ in this field and continuous operational and monitoring data are being shared with MRCSP for research purposes.