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The formation-to-age correlations are not straight-forward as formation names for a given geologic age do change from locale to locale, even within the same state. Over 4,000,000 wells have been…

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Eight general types of gravity and magnetic surveys (including gradiometry surveys) are described below. Each type of survey is acquired in a unique operating environment and for a specific purpose.…

Gravity exploration must account for the horizontal and vertical differences in density which occur in subsurface geologic features. Gravity anomalies require lateral density discontinuities such as stratigraphic or structural changes…

Magnetic susceptibility is known as the ratio of the magnetization of a material to the magnetic field strength; it is a tensor when these two quantities are not parallel, otherwise…

Velocity, in this context, is the speed (distance / time) of sound (a compression wave) through rock (which may contain fluid and gas). Velocity may be used to determine rock…

Airborne magnetic surveying for petroleum exploration continues to routinely and indisputably reveal interesting and measurable magnetic anomalies (as small as 0.1 nT under the best survey conditions) which arise from…

Each geologic province may have unique geological or geophysical parameters. Therefore the prospective anomaly signature associated with each individual province will vary accordingly. Pattern recognition of anomaly signature is of…

Each geologic province may have unique geological or geophysical parameters. Therefore prospective anomaly signature associated with each individual province will vary accordingly. Pattern recognition of anomaly signature is of vital…

Each geologic province may have unique geological or geophysical parameters. Therefore prospective anomaly signature associated with each individual province will vary accordingly. Pattern recognition of anomaly signature is of vital…