Quantitative Analysis of Point Receiver 3D Seismic for Optimum and Cost Effective Survey Design, Case Study

The objective of this study is to develop an optimized and fit-for-purpose design for future surveys; a dense point-receiver 3D acquisition pilot has been decimated to simulate alternative acquisition geometries where advanced noise attenuation techniques have been tested.

Noise attenuation using the true receiver coordinates have addressed some of the limitations of earlier DGF methods and further improved the S/N. Additionally, surface wave analysis, inversion and modelling was effective on the attenuation of coherent noise even when aliased.

These developments in processing technology, in the context of integrated acquisition and processing design, have allowed us to redesign our acquisition geometries to be more cost-effective.

Therefore, the design of the current acquisition of Burgan field was driven by the results of this study by using single lines of the point-receivers at a denser receiver line spacing, with symmetrical source geometry. The reduction in source and receiver line intervals will not only improve the near offset distribution required to image the shallow target, but will also improve the fold per offset/azimuth/midpoint bins for better signal to noise ratio and imaging through smaller OVT dimensions.