| Title | An Evaluation of Direct Use Project Drilling Costs |
|---|---|
| Authors | Dolenc, Max R.; Childs, Frank W.; Allman, David W.; Sanders, Ray D. |
| Year | 1983 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Direct Use; Drilling; USA; Western States; South Dakota; Montana; Colorado; Utah; Nevada; Idaho; Drilling Costs; Depth; Sedimentary Rock; Volcanic Rock; Rig Mobilization; Day Rate; Footage Rate; Acidize; Perforate; Lost Circulation; Sloughing |
| Abstract | This study evaluates drilling and completion costs from eleven low to moderate temperature geothermal projects carried out under the Program Opportunity Notice (PON) and User Coupled Confirmation Drilling Programs. Projects under both programs are administered by the Department of Energy Idaho Operations Office. The balance of PON projects were administered by other DOE field offices. Several studies have evaluated geothermal drilling cost, particularly with respect to high temperature system drilling costs. This study evaluates drilling costs and individual cost elements for low to moderate temperature projects. It considers the effect of drilling depth, rock types, remoteness of location, rig size, and unique operating and subsurface conditions on the total drilling cost. This detailed evaluation should provide the investor in direct use projects with approximate cost projections by which the economics of such project can be evaluated. |