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CASE 1 -
MID-CONTINENT FRACTURING TREATMENT
A Mid-Continent operator routinely runs
Zero Wash® tracer on completions to be certain that all portions of
the reservoir are adequately stimulated. On several wells, including
the case illustrated below, portions of the pay were unstimulated or
understimulated and reserves that would have been bypassed were
identified as recompletion candidates by Zero Wash® tracer
technology.
The first tracer survey was run after the
initial fracture stimulation treatment. The early proppant (2/3 of
total sand volume) was traced with Sb-124 Zero Wash® (blue)
and the late proppant (1/3 of total sand volume) was traced with
Ir-192 Zero Wash® (red) tracer. Notice how the upper zone
above x780 is severely understimulated. Less than adequate proppant
concentrations were placed across this interval.
A bridge plug was set at x780 and the
upper interval was restimulated with a smaller treatment. All of the
second treatment's proppant was traced with Sc-46 Zero Wash®
(yellow). Notice on the tracer survey run after the refrac that
adequate proppant concentrations were placed across the upper
interval. The production data indicate that this well's production
was more than doubled by using and applying Zero Wash® tracer
technology. When this type of well performance improvement is seen
on only 10% of your completions, Zero Wash® tracer technology
will return more than a 12:1 benefit to cost ratio (SPE
30794).
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