Four operating companies and five service companies in the petroleum and geothermal industry were contacted (1) to determine needs for wellbore temperature predictions during operations and (2) to evaluate interest in use of a wellbore thermal simulator (computer program) if developed by ERDA. As a basis for contacting industry, a literature survey was undertaken to assess the state-of-the-art and availability of wellbore thermal simulation capability. The literature review is summarized in the four tables of Appendix 1. Written abstracts of the individual articles is given in Appendix 2. The feedback from industry is presented in Appendix 3 in the form of completed questionaires.