McMurray Formation channels sands were observed within the seismic data through the analysis of the semblance attribute, as well as within the geological data as low gamma ray values on well log cross sections. Geological well log information was integrated with the geophysical observations. The attenuation of high frequencies beneath steam chambers was observed within the monitor survey, characterized by lowfrequency shadows, observable on the Devonian reflection underlying the amplitude anomalies. An analysis of the amplitude anomalies yielded a spatial display of reservoir steam chamber distributions. The decrease of velocity was interpreted to be due to the increase in reservoir temperature and decrease in differential pressure created from the injection of high temperature steam into the McMurray Formation reservoir. High amplitude anomalies were observed on the monitor data in conjunction with apparent time-thickening of the reservoir interval due to a decrease in the P-wave velocity. Two 3-D seismic datasets and their difference volume were interpreted and analyzed for the presence of amplitude anomalies and time delays related to the injection of steam into a shallow, heavy oil reservoir.
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