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A high resolution 3-0 seismic survey was con-ducted at an Athabasca Tar Sands Thermal Pilot for the ultimate purpose of locating and moni-toring the progress of in-situ heat fronts. In order to obtain the required seismic expres-sion, it is imperative that the field data have exceptionally good signal-to-noise and frequency content. This paper addresses some of the spe-cialized acquisition, processing, and display techniques which could give the necessary resolution. The geology of the pilot site is characterized by a 50 m thick section of McMurray tar sands, resting on a Devonian unconformity surface, 240 m deep. Imaging of this erosional surface, critical to the pilot, is demonstrated by var-ious interactive displays. The definition of a narrow channel has shown that exceptional spa-tial and temporal resolution can be achieved.This will be necessary for the future seismic mapping of the in-situ heat fronts, as well as potentially making reservoir parameter descrip-tions possible on a scale never before thought achievable. 1381 INTRODUCTION A high resolution 3-0 seismic base survey was conducted at Amoco's (AOSTRA and Petro-Canada) Gregoire Lake In-situ Steam Pilot (GLISP) located in northeastern Alberta, Canada, approx-imately 40 km south of Fort McMurray. The prime purpose for acquiring the base survey was to use this information as a basis of comparison with future monitor surveys of a similar type. In order to achieve the required seismic expres-sion for mapping the heated zones, it is impera-tive that the field data have an extremely good signal-to-noise ratio over a broad frequency band. This paper addresses the specialized acquisi-tion, processing and display techniques which were used to gather and manipulate the 3-D data.Imaging of the Devonian unconformity surface, at a depth of 240 m, demonstrates that exceptional spatial and temporal resolution, so necessary for accurately mapping heat fronts, has been achieved. The well configuration for the pilot site was to consist of a central injector surrounded by three eiluidistant producers and three infill

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