Minimal-impact seismic acquisition: successful imaging using an accelerated weight drop system

Abstract

Under a joint agreement with the Cambodian National Petroleum Authority, PGS has commenced the first onshore seismic survey in the Kingdom of Cambodia. The aim of this seismic exploration program is to improve understanding of the hydrocarbon prospectivity of the Tonle Sap and Kompong Som Basins. The current area of operation is focused on the Tonle Sap Basin - with seismic lines extending from Battambang in the north to approximately 50km SE of Pursat in the south. The reconnaissance 2D seismic exploration program has been designed around structural trends and a depth-to-basement model derived from high-resolution aerogravity and aeromagnetic data available in the Tonle Sap Basin. At the time of writing, some 700 km of 2D seismic data have been acquired. The main geophysical and geological objectives of this seismic acquisition program have been to: ? verify the presence of the gravity lows and the depth-to-basement model ? verify the presence of a potential petroleum system; and ? obtain a better understanding of the structural evolution of the basins.