SCALE INHIBITORS


Scale Inhibitor is a chemical treatment used to control or prevent scale deposition in the production conduit or completion system. Scale-inhibitor chemicals may be continuously injected through a downhole injection point in the completion, or periodic squeeze treatments may be undertaken to place the inhibitor in the reservoir matrix for subsequent commingling with produced fluids. Some scale-inhibitor systems integrate scale inhibitors and fracture treatments into one step, which guarantees that the entire well is treated with scale inhibitor. In this type of treatment, a high-efficiency scale inhibitor is pumped into the matrix surrounding the fracture face during leakoff. It adsorbs to the matrix during pumping until the fracture begins to produce water. As water passes through the inhibitor-adsorbed zone, it dissolves sufficient inhibitor to prevent scale deposition. The inhibitor is better placed than in a conventional scale-inhibitor squeeze, which reduces the retreatment cost and improves production.


Annie Chemie Pvt. Ltd. offers several types of Scale Inhibitors namely:

Applications:

Oil field: Pumped at 1 to 4 gpt with frac fluids to provide residual scale inhibition. Designed to adsorb on to proppant and release over time.

Water Treatment: Scale Inhibition in cooling water and other water based systems

Chemical Structure: SI-625 is a water based blend of neutralized phosphonates which have excellent Calcium Carbonate, Calcium Sulfate, Barium Sulfate and Strontium salts chelation capabilities.

Compatibility: Compatibility with brine, calcium chloride, KCl solutions as well as all known fracturing fluids, gels, cross-linkers and additives.


SI-625 Performance Evaluation

Scale Type InhibitorActive Concentration (ppm) % Scale Inhibition
CaCO3 005 68.30%
CaCO3 010 84.90%
CaCO3 050 93.40%
CaCO3 100 99.10%
CaSO4 005 91.00%
CaSO4 010 97.60%
CaSO4 050 99.30%
CaSO4 100 99.20%
BaSO4 005 02.30%
BaSO4 010 05.40%
BaSO4 050 71.40%
BaSO4 100 98.40%

Scales used are proprietary. Test conditions 150 deg F for 2 hours

Scale Inhibitor, Low Molecular PolyAcrylate SI-306

Applications:

Oil field Pumped at 1 to 4 gpt with frac fluids to provide residual scale inhibition. Designed to adsorb on to proppant and release over time.

Water Treatment Scale Inhibition in cooling water and other water based systems


Chemical Structure

SI-306 is a solution polymer which has excellent soluble scale forming salt chelation capabilities combined with superior dispersion capabilities of insolubles. The polymer is a low molecular weight (5,000 daltons average MW) Acrylic backboned polymer.

Typical Physical Properties

Appearance: White to Amber Hazy

pH: 3.5

Viscosity: 450 cP

Specific Gravity: ~1.15,

Compatibility: Compatibility with brine, calcium chloride, KCl solutions as well as all known fracturing fluids, gels, cross-linkers and additives.


Scale Inhibitor, Neutralized BHMT Phosphonate SI-B325 Applications:

Oil field Pumped at 1 to 4 gpt with frac fluids to provide residual scale inhibition.

Water TreatmentScale Inhibition in cooling water and other water based systems

Chemical Structure:

SI-B325 is a highly concentrated, water-based, neutral pH, sodium salt of BHMT phosphonate which has excellent Calcium Carbonate, Calcium Sulfate, Barium Sulfate and Strontium Salts chelation capabilities. It is soluble in hard water and most other polar solvents.

Physical Properties:

Appearance: Clear Brown Solution

Assay: 32.5% min

Iron: Less than 10 ppm

Specific Gravity: 1.26 to 1.35

pH: (neat) 5.0 – 6.0

Compatibility: Compatibility with brine, calcium chloride, KCl solutions as well as all known fracturing fluids, gels, cross-linkers and additives.