A Case Study: Geohazards Risk Assessment for a Proposed Pipeline Across Diverse Geological Environments in Papua New Guinea

This chapter on geohazards risk assessment is from the proceedings of an international conference on the terrain and geohazard challenges facing onshore oil and gas pipelines (June 2004, London, United Kingdom). The authors present a case study, describing the approach used to carry out a concept level assessment of the geotechnical viability of a proposed liquefied natural gas pipeline extending from the Hides Gasfield to the northern coast of Papua, New Guinea. They describe the study methodology, including office studies, landslide susceptibility and hazard zonation, and field reconnaissance; features of the pipeline corridor, including topography and landforms, and the geology of the area; risk analysis; and the approach to assessing some of the geohazards, including earthquakes, liquefaction, volcanic activity, landslides, rainfall, floods, and river avulsions. In this setting, a diverse range of geological environments was encountered, including thrust-faulted highlands, mountainous ridge and ravine, volcanoes, karst limestone, drowned valleys, and mega shear zones. Each of these environments had specific hazards that needed to be evaluated, including landslide dams, co-seismic and non-seismic landslides, solution features in carbonate strata, and river avulsion. A geohazard risk rating matrix was developed for each pertinent hazard identified and applied to each segment of the route. The authors conclude that the majority of the study team determined that it was technically feasible to build the pipeline within the parameters set for the project.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Maps; References; Tables;
  • Pagination: pp 129-143
  • Monograph Title: Terrain and Geohazard Challenges Facing Onshore Oil and Gas Pipelines. International Conference

Subject/Index Terms

Filing Info

  • Accession Number: 01109900
  • Record Type: Publication
  • ISBN: 0727732781
  • Files: TRIS
  • Created Date: Aug 28 2008 12:19PM