Title:

New Interpretation of DC Resistivity Data in the Sibayak Geothermal Field, Indonesia

Authors:

Supriyanto Suparno, Yunus Daud, Syamsu Rosid, Dede Djuhana and Yayan Sofyan

Key Words:

2-D inversion, VES Schlumberger resistivity, ABIC method, Sibayak geothermal field.

Geo Location:

Sibayak, Indonesia; Sumatra

Conference:

World Geothermal Congress

Year:

2010

Session:

13. Geophysics

Language:

English

Paper Number:

1377

File Size:

432KB

View File:

Abstract:

DC Resistivity analysis was carried out in the Sibayak geothermal using Schlumberger Vertical Electrical Sounding (VES) during a preliminary study in 1990. The resistivity data has been processed conventionally using one-dimensional (1-D) inversion to estimate vertical variation of resistivity related to hydrothermal activity at shallow depths of less than 1 km. Subsequently, the inversion results were correlated to develop a 2-D resistivity section; afterwards, it was combined with the MT data processing result. However, the results of 1-D inversion of DC resistivity are not fully satisfactory for actual 3-D structures such as geothermal systems. Therefore, we have re-processed the same Schlumberger VES data set by performing a 2-D inversion based on ABIC least squares method. The 2-D inversion result shows a more realistic feature in terms of geological structure. Caldera boundaries and a dome-like structure of the low resistivity are clearly determined, indicating an up-flow zone around fractures in the southeast direction of the Sibayak Mountain. By tuning and improving the interpretation method, we accomplished descriptions of the shallow subsurface conditions in the Sibayak geothermal field. These results can be used to improve the understanding of the shallow subsurface conditions in the Sibayak geothermal field.


ec2-3-215-186-30.compute-1.amazonaws.com, you have accessed 0 records today.

Press the Back button in your browser, or search again.

Copyright 2010, International Geothermal Association: Readers who download papers from this site should honor the copyright of the original authors and may not copy or distribute the work further without the permission of the original publisher.


Attend the 2020 World Geothermal Congress, Iceland, 2020, click here for details.

Accessed by: ec2-3-215-186-30.compute-1.amazonaws.com (3.215.186.30)
Accessed: Friday 24th of May 2024 06:21:23 AM