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 Fracture conductivity testing is a specialty at Stim-Lab. The long-term conductivity
of a proppant is determined between either standard lab core (Ohio & Berea)
or customer submitted formation core samples in patented multi-cell stacks. Tests
are run with and without fluids present at a specified temperature (up to 300°F),
closure pressure (up to 14,000 psi), and time.
Tests include:
- Short-Term API Conductivity
- Long-Term Conductivity
Between Core
- Gas Flow Turbulence Factors
- Multiphase Flow Evaluation
- Flowback Characterization
- Regain Conductivity of
Fracturing Fluids
Fracture treatment simulations
are run between core with a specified fracturing fluid and proppant, followed by
cleanup with brine, oil or gas.
Individual proppant quality tests for API RP 56, 58 and 60 include:
- Sieve Analysis
- Krumbien Shape Factor
- Acid Solubility
- Silt and Fine Particulate
- Crush Resistance
- Specific Gravity
- Bulk Density
Conductivity research at Stim-Lab
is on-going through a consortium for "The Investigation of the Effects of Fracturing
Fluids on the Conductivity of Proppants." Consortium members participate in studies
that examine proppant conductivity in downhole conditions, proppant flowback and
fracturing fluid leakoff. Membership in the consortium is available on a yearly
basis.
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