Recent advances in 3D land processing: Examples from the Pakistan Badin area

The Badin Concession is relatively mature with many small oil fields which collectively account for about 50% of Pakistan’s current oil production. In total about 220 wells have been drilled in the area. Between 2000-2002, BP acquired over 2500 Km2 of 3D data over the Badin area using a non-orthogonal geometry. We demonstrate the improvement in data quality gained from the application of two recent advances in 3D processing - 3D velocity filtering to attenuate the linear noise, pre-stack (Meunier, 1999) and 3D acquisition footprint attenuation, post-stack (Soubaras, 2002). The Badin-1 Petroleum Concession was granted in 1977 and the first discovery (Khaskeli field) was made in June 1981. Since then 54 fields have been discovered. The first 2D seismic was shot in 1977-78 and overall about 17,000 line km have been recorded. A number of smaller 3D seismic volumes have been recorded since 1996 covering individual fields. Most recently, between 2000-2002, approximately 2500 Km2 of 3D data have been acquired (Figure 1). This includes the 100 Km2 acquired over the Mehran Concession.