The Terang-Sirasun development is reservoired in the Pacuan limestones of the Plio-Pleistocene. Development of the 1 TCF GIIP is complicated by a range of seismically driven overburden and surface processes that constitute a substantial geohazard risk to planned well bore and gas gathering installations. Terang is characterised by significant shallow gas in the overburden and faults, some of which have seabed expression. Sirasun is characterised by fewer faults and little shallow gas but by the location of the present day shelf-slope break This exhibits extreme erosion and potential mass flow features. The challenge for the business unit is to create a development scenario that, where possible, avoids all geohazards for the lowest CAPEX. This involves identification of the risks from conventional geohazard survey datasets totalling some 2 terabytes of data. Manipulation and integration of the data and the associated interpretahon, has involved a multi-discipline team ranging across 3 different companies using a number of software packages such as Fledermaus, Landmark's Earthcube and 3D Drillview KM to define this development scenario. This paper attempts to detail the methods used to deliver the data sets into visualisation packages, identify and analyse the geohazards, the geohazards themselves and the development scenario through visualisation in bp's visualisation centre based on a novel risk assessment approach of the geohazards themselves.
The Terang - Sirasun-Batur (T-S-B) fields exist within an area of extremely active geological hazards (geohazards). Indeed the area was ranked second m the world in terms of geohazard seventy as effecting bp developments, second only to Azerbaijan.
Eight primary contractors were assembled within a BP management environment and tasked with the key objectives of qualifying the HSE and financial performance risks and, where necessary, revising the development layout based on a programme of geohazard identification and risk quantification. The primary contractors comprised:
JP Kenny - Pipeline & Subsea Engineering
K & M Technology - Drilling Engineering
Hydrosearch - Data Quality & Control
Thales (Racal) - Offshore Data Acquisition and Mapping
GMI - Subsurface Geotechnical Engineering
Landmark Graphics - 30 Visualization Software
IVS (Interactive Visualization Systems) - 30 Visualization Software
URS - Earthquake Engineering and Geohazards Interpretation
BP Indonesia - Project Management