Abstract
The Sibayak geothermal field is located in northern part of Sumatra Island, Indonesia. Exploration surveys were conducted during 1989-1997 when ten exploration wells were drilled. Repeated temperatures logging in the wells are analyzed for initial formation temperature using a Horner plot. Then estimated highest formation temperatures are plotted on the activity index curve1) for quantitative evaluation of the thermal potential of wells. Initial reservoir pressures are also determined from a pivot point of pressure profiles. The results show the maximum formation temperature in the Sibayak reservoir reaches up to 310°C. A few wells located in the central part in Sibayak are evaluated to be of Type A of activity index (AI) suggesting high thermal potential. On the other hand, wells at southern part belong to Types C and D of AI. These low grades of thermal potential may be caused by low temperature water inflow along the caldera rim.
| Original language | English |
|---|---|
| Pages (from-to) | 129 |
| Number of pages | 1 |
| Journal | Memoirs of the Graduate School of Engineering, Kyushu University |
| Volume | 60 |
| Issue number | 3 |
| Publication status | Published - 2000 |
All Science Journal Classification (ASJC) codes
- Energy(all)
- Process Chemistry and Technology
- Atmospheric Science
- Management of Technology and Innovation
- Earth and Planetary Sciences(all)