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Generation of heat flow map over a part of the Cambay Basin, India using NOAA-AVHRR data

Heat flow measurements carried out in the Cambay Basin, India indicate high heat flow values (1.8–2.2 μcal cm−2 s−1/77–92 mW m−2) compared to the normal heat flow values of approximately (1.4 μcal cm−2 s−1/58.6 mW m−2) for stable continental shield areas. This makes the region interesting from a tectonic as well as a geothermic point of view. The surface heat flow can be computed by multiplying the geothermal gradient by the rock conductivity. The paper develops a methodology to determine heat flow using a remote sensing technique. The same is then measured at a few points in-situ for validation and the methodology is then extended to a larger (potential oil basin) area using NOAA thermal infrared (IR) data. The comparison shows encouraging results at match points that may be useful for prospective hydrocarbon resources. The heat flow estimation technique using the remote sensing approach is, therefore, highly important and can be utilized as an alternative to conventional heat-flow estimation.