On a global scale, up to 8 of every 10 exploration wells fail to find commercial levels of hydrocarbons. Despite studies concluding that seal and charge explain 75% of this failure, most of the money and effort is put into using seismic to better understand trap and reservoir. Pe is the probability of finding commercial volumes of hydrocarbons, which is the goal of every exploration well.
Unfortunately, volume is also poorly assessed by seismic data alone, making the estimate of Pe uncertain. This is exactly where CSEM data can help for most offshore basins around the world.
EMGS uses CSEM to provide E&P companies with information they need about saturation (seal and charge) and net rock volume.
CSEM surveys can map resistivity anomalies in the subsurface. The electrical resistivity of the subsurface is strongly correlating with the fluid content and the saturation of hydrocarbon reservoirs. Thus, the larger the charged reservoir, the greater the CSEM data response.