Abstract

In 2015, a new seismic data set was acquired over the Lookout Field in Alaska in anticipation of development. The survey was acquired using principles of compressive seismic imaging (CSI). This was the first implementation of this technology on land for ConocoPhillips and was a test of its robustness in Arctic conditions. Although there were challenges specific to CSI in acquisition and processing, the test was a success. Since then, CSI design has been used for multiple surveys. The Lookout survey had general imaging objectives for the overburden and reservoir zone, including increased horizontal and vertical resolution, higher signal-to-noise ratio, and amplitude preservation. There were also specific objectives of a more accurate structural image beneath the Fish Creek Slumps, fault identification in the reservoir, and visibility of reservoir edges. Comparisons of the Lookout 2015 CSI data to the existing exploration-quality legacy data show an overall improved image and that the 2015 survey was successful in meeting the reservoir-specific objectives. CSI principles enable more efficient use of acquisition resources, providing the ability to acquire more seismic data than a high-density conventional seismic shoot while maintaining comparable data quality. The impact of CSI is unlocking development-grade seismic data at exploration-grade cost.

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