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Potassium Chloride (KCl) Clay Stabilizer

CAS Number: 7447-40-7

Potassium chloride is the most widely used inorganic clay stabilizer in drilling fluids, completion fluids, and well stimulation treatments. The K⁺ ion preferentially replaces Na⁺ in the interlayer of swelling clays (smectite, montmorillonite), suppressing clay hydration and preventing fines migration that could damage formation permeability. KCl is used at 2–5 wt% in completion brines and at 3–8 wt% as a clay stabilizer in hydraulic fracturing treatments.

Technical Specifications

appearanceWhite crystalline powder or granules
purity (%)≥99.0
moisture (%)≤0.5
sodium chloride (%)≤0.5
insoluble matter (%)≤0.02

Applications

  • Drilling fluid clay inhibition
  • Completion brine clay stabilization
  • Hydraulic fracturing fluid clay control
  • Sandstone formation fines migration prevention
  • Workover fluid formation damage prevention

Key Features

  • Industry-standard inorganic clay stabilizer for all well applications
  • Effective at low concentration (2–8 wt%) in field brines
  • Prevents clay swelling and fines migration in sandstone reservoirs
  • Low cost and globally available for large-volume oilfield use

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Potassium Chloride (KCl) Clay Stabilizer chemical structure

CAS Number

7447-40-7

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