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Geophysics International services
The Petro-Sonde Geophysical Tool
The Petro-Sonde utilizes the naturally
occurring telluric current (1 Hz or
less) which flows in the upper part
of the Earth's crust to study the
subsurface. Basic laws of physics are
applied to analyze the telluric electric field at the surface to obtain the desired subsurface information.
Electrotelluric technology has the unique ability to provide detailed subsurface information about a reservoir's presence, thickness, depth, and fluid type. Having this unparalleled degree of resolution prior to drilling greatly reduces dry hole risk, thereby increasing your overall success rate.
3-D seismic has a wildcat success rate of 43% while the PetroSonde’s wildcat success rate is closer to 50% at less than 10% of the cost of 3-D seismic.
On development wells the PetroSonde bats close to 80% success. Meaning the depth, thickness of pay, and fluid content are accurate. The ability to determine updip from downdip is the difference, many times, between a gusher and a dry hole. 
