J. Robert Clark2,
(1) Pulse Resources, Spring, TX
(2) Enzyme-ACTLABS, LLC, Arvada, CO
(3) Broughton Operating Co, Houston, TX
Abstract: Enzyme Leach(SM) geochemistry: a significant advancement in hydrocarbon exploration
Enzyme LeachSM geochemistry is a radically new concept in surface hydrocarbon exploration utilizing not just one, but up to 67 elements to determine lateral placement of oil and gas deposits. This new leaching process is the most discriminating of the selective analysis processes in that it tends to extract from soil trace elements that migrate to the surface in a vapor phase. This is done by preferentially dissolving the amorphous form of MnO2 that occurs in coatings on mineral grains in soils. Amorphous MnO2 traps numerous volatile compounds that migrate through soil from the subsurface. These volatiles are generated in oxidation-reduction cells that form over reduced bodies in the subsurface. By not attacking the mineral substrate in the soil, the Enzyme LeachSM dramatically enhances anomaly contrast in the area of these cells. For years, oil and gas reservoirs have been known to generate oxidation-reduction electrical cells, thereby creating current flows from the reservoir to the surface. These currents are extremely vertical in nature, forming near-surface anomalies directly over reservoirs, that essentially mirror the underlying sources. Soil samples taken in a grid pattern over reservoirs will produce a variety of both apical and negative anomalies depending on the elements found in the soil. Mapping of key groups of elements produces plots that are highly indicative of reservoir locations. Definitive apical and low patterns are revealed showing the current flow patterns, and hence the oil fields. Recent surveys have defined Cotton Valley Reef fields covering 30 acres at depths to 17,000'.
AAPG Search and Discovery Article #90914©2000 AAPG Annual Convention, New Orleans, Louisiana