Eldorado Exploration

Overtime, geophysical effects and changes occur in terrain and rocks that overlie subsurface hydrocarbon accumulations. These hydrocarbon particles migrate to the surface from such accumulations and leave trace footprints. There are various types of changes, rates of migration, and methodologies being utilized to detect hydrocarbon migration. A compilation of these geologic changes, migration rates, and variance in terrain provides a significant data pool for analyses.

Surface geophysics as applied to oil and gas exploration, is the search for surface and shallow subsurface direct indications of micro-seepage hydrocarbons or their subsequent effects. These alterations or footprints left by hydrocarbon filtration

through rock formations above subsurface accumulations are detectable with innovative technologies.

Generally speaking, geophysical surveys are a reliable indicator for prospects acquired from seismic or other exploratory processes. A negative anomaly usually assures about a 90% failure rate. Whereas hit rates for potential commercial oil prospects with positive anomalies are approximately 40% to 60% for successful finds.

The art of interpreting the garnered data based on case histories, geological considerations, and experience is the critical element of surface geophysical exploration.

The proprietary detection process, Passive Induced Polarity (PIP), a geophysical detection technique that uses data related to geochemical, magnetic, gravitational, and radiation anomalies. This process can detect positive or negative anomalies over a prospective oil field.

Oil prospects that use Passive Induced Polarity surveys before drilling will have either a positive anomaly or a negative anomaly. Those prospects that have positive anomalies will have a greater possibility for success. Those with negative anomalies will nearly always be dry holes.