Bight Petroleum Pty Ltd (‘Bight’) is proposing to undertake a 3D Marine Seismic Survey (MSS) in the Commonwealth waters of the Bight Basin, South Australia (SA).
The Lightning 3D MSS activity will be undertaken within EPP‐41, EPP‐42 and adjacent non‐permit areas (Bight Basin). The Lightning MSS area is located approximately 104km west of Kangaroo Island, 68km south of Cape Carnot (Eyre Peninsula) and 68km south‐west of the South Neptune Islands (SA). The MSS will be undertaken in water depths ranging from 130m along the northern survey boundary to 2400m along the southern survey boundary.
The seismic vessel will operate in a NW‐SE direction when acquiring seismic data and will maintain a minimum distance of approximately 68km from the South Australian coastline during the MSS activity. The seismic vessel will, while acquiring seismic, travel at an average speed of approximately 8–9 km/h (4–4.5 knots). As the vessel travels along the survey lines, a series of acoustic pulses, activated at approximately every 11 seconds, will be directed down through the water column into the seabed via a dual source array. The acoustic signals are attenuated through the subsurface geological structure; reflect at geological boundaries and the reflected signals are detected using hydrophones, arranged in series along a number of cables (streamers) towed behind the survey vessel. The seismic equipment will consist of up to twelve (12) hydrophone collectors (“streamers’) towed at a depth of approximately 8m, with a maximum length of 8100m each separated by approximately 100‐120m. These hydrophone streamers will be solid streamers (with small amounts of Isopar liquid). The dual source array each with a volume of up to 3250in3 operating at 2000psi will be towed at a depth of approximately 6m.
The proposed Lightning 3D MSS program will acquire seismic data between 1st March and 30th May 2015 (or 2016) with the activity expected to take approximately 70days dependent on weather conditions and operational efficiency. Commencement and completion dates are dependent on vessel availability and weather conditions.
Note: This information has been extracted from the EP Summary. Please refer to the attached EP Summary for more information.