Core Flow Evaluation


Ask an Expert

Custom designed Tests Simulate Down-Hole Applications as Closely
as Possible

Stim-Lab’s Core Flow Testing Group offers a broad range of services related to formation damage, completions, and stimulation. Whether it is testing to compare the damage created by different fracturing fluids or effectiveness of different acidizing packages, unbiased comparisons of different products allows the operator to better choose which is right for their application before field application.

Fluid Sensitivity Screening by Capillary Suction Time (CST) and Roller Oven (RO) Analysis

Clay Control comparisons

Guidance for drilling & completion fluids

Analysis of various Production Water/Fresh Water Ratios

Depletion Studies

Capillary Suction Time Test

  • Measures the relative flow capacity of a slurry of ground formation rock used to form an artificial core and it is an indication of clay swelling.
  • A rock sample with dispersible or swelling clays would have a lower pseudo permeability and will have a longer CST time while the one without clay or other fine particles would have a shorter retention time.

Roller-Oven Shale Stability Test

  • Simulates the circulation of the completion fluid around ground rock particles
  • Studies the reduction of particle size due to mechanical attrition and reaction of shale particles with various test fluids
  • Measures erosion of shale in the presence of various salinity fluids (KCl, NaCl, fresh water), Clay controls, Completion fluids, Additive packages, etc.

Shale Flow Properties: Unpropped Fracture Conductivity

Saline Solutions

Clay Controls

Acids Produced – Fresh Water Mixtures

Determine Regain Conductivity to Gas or Oil

Our Unpropped Fracture Conductivity testing allows us to determine sensitivity to various fluids in a core sample by flowing fluids through the unpropped induced fracture along a bedding plane and comparing the conductivity of the fracture with the various fluids.

By using the following methods we can offer guidance in fluid choices for various formations in samples with very low matrix permeability (reporting conductivity through the fracture in the micro to nano-Darcy range).