Time-Lapse Seismic Survey in the Oil Sands Area - JACOS SAGD Operation Area, Athabasca, Canada - - Model Study and Data Acquisition -
Time-lapse 3D seismic survey was conducted in the Japan Canada Oil Sands Limited (JACOS) Hangingstone steam-assisted gravity drainage (SAGD) operation area, Alberta, Canada. The objectives of the time-lapse survey were to delineate steam chambers and monitor their growth. A seismic modeling study based on well logs was also carried out to predict the changes in seismic response of the oil sands reservoir due to steam injection. The results of our seismic modeling indicate that the change of the reservoir P-wave velocity due to the steam injection is seismically detectable, and our time-lapse seismic data was consistent with the seismic modeling. The time-lapse seismic monitoring is expected to help better understanding of the heterogeneity of the reservoir sands by integrating the information of the steam chamber geometry and the seismic response analysis.
To assist Java programming educations, we have developed a Web-based Java Programming Learning Assistant System (JPLAS). JPLAS provides fill-in-blank problems to study the Java grammar by filling blank elements in a high-quality code that are composed of reserved words, identifiers, and control symbols. A graph-based blank element selection algorithm has been proposed to automatically select as many blanks as possible that have grammatically correct unique answers. In this paper, we show and discuss their application results to a Java programming course in our department.