INTEGRATED MULTIDISCIPLINARY SPATIAL AND TECHNICAL ASSESSMENT FOR ONSHORE LNG INFRASTRUCTURE DEVELOPMENT: A CASE STUDY OF THE DETAILED SPATIAL PLAN (RDTR) FOR LERMATANG VILLAGE, MASELA BLOCK, INDONESIA

Abstract

ABSTRAK Background The Masela Block (Abadi Field) is one of the largest oil-and-gas-sector National Strategic Projects in Eastern Indonesia, with Lermatang Village and Nustual Island, Tanimbar Islands Regency, planned as the site for supporting onshore facilities. This large-scale development raises cross-disciplinary issues, from geological characteristics and customary (ulayat) land status, to LNG supply-chain feasibility and civil infrastructure risk, none yet examined within one integrated framework. Methods This study uses SHP data from the 1:5000-scale Lermatang Village Detailed Spatial Plan (RDTR) as its spatial foundation, combined with a narrative synthesis of journal articles, theses, technical reports, and official agency data (BMKG, BNPB) on the Masela Block and the Tanimbar Islands, grouped into four disciplines, Geological Engineering, Urban and Regional Planning, Industrial Engineering, and Civil Engineering, with findings compared against the project’s 2026 realization. Results From the geological perspective, fault structures and rock formation variations around the Tanimbar Trough provide the regional context. From the planning perspective, an AHP weighting places the Masela Block highest (0.559) among the outermost small islands, while the land dispute on Nustual Island and divided community readiness (53.8% ready) remain a concern. From the industrial engineering perspective, the 2.5 MTPA plant shows an IRR of 12.3% and a payback period of 4.81 years. From the civil engineering perspective, a Pugh matrix identifies Yamdena Island as the most feasible plant site, consistent with the groundbreaking in Lermatang Village in July 2026 on a land area of approximately 662 hectares. Conclusion The technical feasibility of the area supporting the Masela Block is fairly strong in infrastructure engineering and geological context, but depends on resolving customary land issues and social readiness. The agreement between the multi-criteria analysis and actual development confirms the relevance of the Detailed Spatial Plan (RDTR) as an integrated planning instrument for energy zones in remote island regions.