Reservoir controling factors in the Karaha-Telaga Bodas geothermal field, Indonesia
By: M. Nemcok, J.N. Moore, Carl Christensen, R. Allis, T. Powell, B. Murray, and G. Nash
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Abstract
Karaha - Telaga Bodas geothermal system consists of: 1) a caprock, ranging from several hundred meters to 1600 m thick that is characterized by steep, conductive temperature gradients and low permeabilities; 2) an underlying vapor-dominated zone that extends below sea level; and 3) a deep liquid-dominated zone with measured temperatures up to 353??C. Heat is provided by a 3 km deep tabular granodiorite stock. The effective base of the reservoir is controlled by the stress regime's effect on fractures within volcanic rocks located above the brittle/ductile deformation boundary. The base of the caprock is controlled by the distribution of initially low-permeability lithologies above the reservoir; the extent of pervasive clay alteration that has reduced initial permeabilities; the distribution of secondary minerals deposited by descending waters; and by a downward change from a strike-slip to an extensional stress regime. Producing zones are controlled by both matrix and fracture permeabilities.
Suggested Citation
Nemcok, M., Moore, J., Christensen, C., Allis, R., Powell, T., Murray, B., Nash, G., 2005, Reservoir controling factors in the Karaha-Telaga Bodas geothermal field, Indonesia, in Transactions - Geothermal Resources Council, v. 29, Reno, NV, 25 September 2005 through 28 September 2005, p. 407-412.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Reservoir controling factors in the Karaha-Telaga Bodas geothermal field, Indonesia |
| Volume | 29 |
| Year Published | 2005 |
| Language | English |
| Larger Work Title | Transactions - Geothermal Resources Council |
| First page | 407 |
| Last page | 412 |
| Conference Title | Geothermal Resources Council 2005 Annual Meeting |
| Conference Location | Reno, NV |
| Conference Date | 25 September 2005 through 28 September 2005 |