Integrating Analytical Hierarchy Process into Play Fairway Analysis to Construct Favorability Model of Lumut Balai Geothermal System, Indonesia

Abstract

Play Fairway Analysis (PFA) has been broadly applicable in the geothermal resource assessment. Nevertheless, bias and inconsistency may appear during the resource parameter sensitivity evaluation. A proportional factor number should be assigned to these parameters to measure their impact on the favorability model.
This paper promotes the integration of the Analytical Hierarchy Process (AHP) into the PFA approach to eliminate inconsistency in the resource parameter evaluation. Eighteen resource parameters from Lumut Balai geothermal system were evaluated to construct a favorability model in a 3D environment. The result suggests that feedzone and temperature conditions are highly affecting the favorability assessment in this area. AHP obtained a sensitivity factor for feedzone and temperature of 10.6% and 9.3%, respectively. The study demonstrates a compelling outcome and improves certainty in our favorability model.