Publications

This paper presents a case study from the Eni operated Muara Bakau PSC (Jangkrik) on the East Kalimantan shelf edge and the west slope of the Makassar Straits. The paper discusses the resolution and accuracy of Short-Offset Processed 3D Seismic Data (SOPS) and the applicability of the resulting Digital Terrain Models (DTM) for seabed mapping as a cost effective methodology for initial field development design and planning. The results are then compared with data from a high resolution Autonomous Underwater Vehicle (AUV) DTM. A SOPS DTM of 12.5x12.5m grid spacing was generated covering a total area of 330 Km². A somewhat smaller area was later surveyed utilizing an Autonomous Underwater Vehicle (AUV). The resulting AUV DTM was of 1x1m grid spacing. A number of exploration wells were already drilled within the area and accurate water depth measurements were performed from three of those wells. This provided the opportunity to evaluate the SOPS DTM accuracy and resolution. In the Jangkrik Project development, SOPS DTM could be performed at an early stage and thus was an important element for a fast track project such as the Jangkrik Field development. Execution at an early stage (during concept selection) enabled: a. Progressing the subsea system design of a “fast track” project without waiting for site geophysical survey (AUV). b. Making key decisions at an early stage avoiding the cost and time impact of later changes such as: relocating the JK 7 well because its initial position was found to be within a canyon.