The loss of "signal" around all six injectors
is clear, however, additionally, all four of
Geochemical Fracture Detection
the structural highs measure higher soil iodine values after CO2
injections compared to the baseline survey.
Maybe the most popular word in the oil patch today is "fracture." Unconventional
resources depend on the creation of fractures to produce hydrocarbons from tight
reservoirs. Fractured reservoirs are not new, they have been important sources of
hydrocarbons from the beginning. Many are traditional structural or stratigraphic
subsurface accumulations but some are fractures or clusters of fractures, breccia, which
act like vertical tanks. These structures are difficult to locate traditionally but make
excellent targets for geochemistry.
Stoney Point Field
This iodine survey was collected across the northern portion of the Stoney Point Field
prior to discovery. Along with radiometric and seismic surveys these data were credited
with the discovery. Stoney Point, with more than 10 million barrels of oil produced, is a
few miles west of the giant 100 million barrel Albion -Scipio field, and the name sake of
this type of deposit. These fields produce from dolomite formed in fractures. These
fracture reservoirs are long, thin, nearly linear features.   
Jackson and Hillsdale Counties Michigan 3W 4S
Although there are almost three times more wells than geochemical samples a simple
outline of the anomalous samples, collected along the roads, has outlined the field. The
anomalies are a mixture of mildly anomalous points and a few very high values. Other
surveys over fractures have had similar distributions.
GrayStone Exploration Labs, Inc.
GrayStone Exploration Labs, Inc.