Although the content of the Workshop has changed over the years, the format to date has proved to be satisfactory. It was, however, necessary to restrict the presentations and not all papers printed were presented. A total of 51 papers were contributed and are printed i n these Proceedings. After overviews by Bob Gray of the Department of Energy and Jack Howard of Lawrence Berkeley Laboratory, we had papers on field development, geopressured systems, production engineering, well testing, modeling, reservoir physics, reservoir chemistry, and risk analysis. There was a reduction in the number of papers offered on pressure transients and well testing and an introduction of several new subjects.

This year there was a shift in subject of the papers. This panel discussion is described in a separate Stanford Geothermal Program Report (SGP-TR42). Papers were presented on two and a half of the three days, the panel session, this year on thenumerical modeling intercomparison study sponsored by the Department of Energy, being held on the second afternoon. This change was in general considered for the better and will be retained for the Seventh more » Workshop. Because of the success of all the earlier workshops there was only one format change, a new scheduling of Tuesday to Thursday rather than the earlier Wednesday through Friday. In addition, there were a number of papers from foreign contributors not able to attend. As with previous Workshops the attendance was around 100 with a significant participation from countries other than the United States (18 attendees from 6 countries). The Sixth Workshop on Geothermal Reservoir Engineering convened at Stanford University on December 16, 1980.

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