Geothermal energy is seen as one important component of the nation's effort to achieve energy self-sufficiency. However, wells that are drilled to tap geothermal energy differ in many important respects from the much more numerous oil and gas wells. Geothermal wells are usually hotter, and are often drilled in harder rocks. Logging geothermal wells poses special problems both in the areas of data gathering and data interpretation. The problems associated with data gathering come about because of the unavailability of cables and tools which can withstand the heat and corrosion encountered in geothermal wells. The problems of data interpretation occur chiefly because geothermal wells are often drilled in unfamiliar formations, and there has not been much experience in logging in such formations, nor has there been much coring and sampling of such wells. Therefore necessary experience and log / core correlations do not exist to allow adequate geothermal well log interpretation. With the present economic climate, private industry is not now developing the necessary tools and techniques for geothermal well-logging. It is concluded that the attainment of Project Independence goals for geothermal resource development will require government support for the development of geothermal well-logging technology and for the necessary data-gathering activities to facilitate log interpretation.