Chemicals for Oilfield Water Treatment

Part 5 Chemicals for Oilfield Water Treatment

CPTDC provides flocculants, scale inhibitors, corrosion inhibitors and bactericides, etc, to clarify wastewater, inhibit corrosion and scale and kill bacteria. These chemicals can protect formation from plugging and reduce down time.

1. Flocculant

Flocculant (XN)

XN is a yellow inorganic macromolecular compound. Both solid and liquid products are available. Its water solution shows faintly acidity. XN can be fed easily without using other additives. The water treated by XN is clear and its pH remains unchanged throughout the treatment. It can be applicable to a wide range of water temperature from 0 ℃ to 100 ℃ and the speed of floc forming is high (30-60 seconds).

● Specification

Test parameters

Properties

Oil removal efficiency

≥90%

Membrane filtration coefficient

≥20

Suspended solids removal efficiency

≥ 85%

● Application

XN is applied in treating waste water in rivers, oilfields, oil processing plants and paper mills.

● Package

Packed in plastic pails (25 kg for each)

● Safety

Avoid contact with the eyes, skin and clothes.

HFI Series Flocculant

HFI flocculants are mainly made from alumina powder, belonging to inorganic macromolecule water purification agents. They have powerful bridging, absorption capabilities, along with characteristics of swift reaction speed, large floccule, fast moulding, and high fitration efficiency.

● Specification

Test parameters

Properties

HFI (liquid)

HFI (solid)

Apparence

Amber or brown Liquid

Amber or brown power

Specific density (20 ℃)

1.10-1.30

－

Alumina content

≥9%

≥27%

Water insoluble content

≤1

≤3

pH (1% aq. solution)

3.0-5.0

Basicity

45%-85%

● Application

HFI flocculants can be used in the treatment of industrial wastewater, oilfield wasterwater and injected water, etc. They are effective to remove suspended solids, COD, BOD, chromaticity, oil dissolved in water, etc. The dosage is usually 50-100 mg/L, and should be decided on the results of the laboratory and field tests.

● Package

HFL (liquid) flocculant should be packed in plastic pails (25 kg for each). HFL (solid) flocculant should be packed in multiwall sacks (25 kg or 50 kg for each), with PE film lining inside.

● Safety

Store in a dry place.

2. Scale Inhibitor

HSI Series Scale Inhibitor

HSI series scale inhibitors are formulated mainly with organic polybasic phosphoric acid, and supplemented with other types of auxiliary agents. They are mainly used to inhibit carbonate scale and are perfectly stable at high pH value, and can form stable complex compound with metals such as iron, copper, zinc, aluminium, etc.

● Specification

Test parameters

Properties

HSI (ordinary)

HSI (concentrated)

Apparence

Colorless or amber liquid

Specific gravity (20 ℃)

1.200-1.350

1.300-1.500

Solubility (1% aq. solution)

Homogeneous liquid

Effectiveness content

≥35.0

≥50.0

pH (1% solution)

1.0-4.5

6.5-8.0

Freezing point, ℃

≤-5

≤-10

Anti-scale efficiency (10mg/L)

≥75.0%

≥90.0%

● Application

HSI scale inhibitors are suitable for anti-scale of circulation cooling water, industrial water, oilfield wastewater and injected water. They can also be used for anti-scale of gathering pipes of high water content cruck oil. The dosage is 5-10 mg/L. HIS (ordinary) scale inhibitor is required to be injected at upstream before the pressure and temperature are changed. HIS scale inhibitor (comcentrated) is required to be injected in either one of two liquids before they are mixed.

● Package

Packed in plastic pails (25 kg for each) or metallic drums (200 L for each) or ISO drums (1000 L for each)

● Safety

Low toxicity; store in a dry and ventilated place

Deflocculant & Sequestrant (HS-323)

HS-323 is a Na salt made from polycarboxylate, low molecular weight polyacrylic acids and their corresponding sodium salts. It contains no phosphorous and can inhibit the deposition of calcium carbonate, calcium sulfate, barium sulfate and other low solubility salts .It has good activity over a wide pH range, water hardness, temperature conditions and has excellent stability in the presence of hypochlorite.

● Specification

Test parameters

Properties

Appearance

Colorless to pale yellow clear solution

Active Content

39.0%-41.0%

pH (1% solution, 25 ℃)

2.1-2.5

Specific gravity (20 ℃)

1.16-1.26

● Application

It can be used in cooling water, pulp & paper reverse osmosis process and oilfield injection systems.

● Package

Packed in 200 L high-density polyethylene drums (200 L for each) or 1000 L IBC (tote) or ISO tanks

● Safety

Avoid contact with skin

Deflocculant & Sequestrant (HS-325)

HS-325 is a terpolymer of AA, AMPS and Sulphonate. It is a superior dispersant and stabilizer in all cooling water programs.

● Specification

Test parameters

Properties

Appearance

Colorless to pale yellow clear solution

Active Content

30.0%

pH (1% solution, 25 ℃)

2.0-3.0

Specific gravity (20 ℃)

1.10-1.20

● Application

The product can control boiler scale, ferric oxide and ferrous oxide in condensate water and formation water. It is a type of superior inorganic dispersant, keeping surfaces clean for maximum heat transfer. It can be used over a broad range of pH, temperature and pressure.

● Package

Packed in HDPE drums (200 L for each),1000 L IBC (tote) or ISO tanks

● Safety

Avoid contact with skin.

Scale and Corrosion Inhibitor (HS-510)

HS-510 can inhibit the deposition of calcium carbonate, calcium sulfate and barium sulfate.It can be used as salt stabilizer within a broad range of pH, temperature and pressure.

● Specification

Test parameters

Properties

Appearance

Colorless to pale yellow clear solution

Active content

28.0%-30.0%

pH (25 ℃)

2.0-3.0

Specific gravity (20 ℃)

1.10-1.20

● Application

HS-510 is widely used as a chelanting agent and calcium carbonate scale inhibitor in industrial water treatment, industrial cleaning, oil production and textile bleaching.

● Package

Packed in HDPE drums (200 L for each), 1000 L IBC (tote) or ISO tank

● Safety

Avoid contact with skin.

Scale and Corrosion Inhibitor (HS-515)

HS-515 can inhibit the deposition of calcium carbonate, calcium sulfate and barium sulfate.It can be used as salts stabilizers within a broad range of pH, temperature and pressure.

● Specification

Test parameters

Properties

Appearance

Colorless to pale yellow clear solution

Active Content

28.0%-30.0%

pH (25 ℃)

2.0-3.0

Specific gravity (20 ℃)

1.10-1.20

● Application

HS-515 is widely used as a chelating agent and calcium carbonate scale inhibitor for industrial water treatment, industrial cleaning, and oil production.

● Package

Packed in HDPE drums (200 L for each),1000L IBC (tote) or ISO tank

● Safety

Avoid contact with skin.

Maleic Acid Copolymer (HS-322)

HS-322 (MA/AA) is an aqueous solution of a polymer based on maleic anhydride. It provides excellent scale control in industrial cooling water systems. In combination with phosphonates, the product gives excellent control of calcium carbonate and calcium sulphate deposition, and can be applied to formulate cost-saving zinc-based corrosion inhibitor.

● Specification

Test parameters

Properties

Appearance

Clear, light yellow solution

Active Content

48% to 52%

pH (1% solution, 25 ℃)

2.0 to 3.0

Specific gravity (20 ℃)

1.18 to 1.22

Freezing point , ℃

-6 to -4

● Application

The product can be used in cooling water and oilfield injection systems.

● Package

Packed in HDPE drums (200 L for each), 1000 L IBC (tote) or ISO tank

● Safety

Avoid contact with skin.

Hydrolyzed Polymaleic Anhydride (HPMA)

HPMA gives excellent scale control performance in industrial cooling water, boiler water, etc.Unlike other polymers which are applied under general water conditions, HPMA can specially used at critical water conditions such as high temperature, high alkalinity, high hardness for control of calcium carbonate and calcium sulfate depositions.

● Specification

Test parameters

Properties

Appearance

Homogenous orange-brown clear liquid

Solid content

48.0%-52.0%

pH (1% solution)

2.0-3.0

Specific gravity (20 ℃)

1.18-1.22

Average molecular weight

450-1000

● Application

The product has excellent crystal distortion performance, thermal & hydrolytic stability and chemical, chlorine stability.

● Package

Packed in PE drums (250 kg or 200 L for each)

● Safety

Avoid contact with skin.

Diethylene Triamine Penta (Methylene Phosphonic Acid)

DTPMP is an organophosphorous compound offering excellent chelation of metal ions with common dosage. The ability of DTPMP to disperse solid particles makes it a versatile ingredient for applications requiring efficient metal ion control.

● Specification

Test parameters

Properties

Appearance

Clear, dark amber solution

Active content

49.0%-51.0%

pH (1% solution)

< 2.0

Specific gravity (20 ℃)

1.35-1.45

Chloride content

< 10%

Phosphorous acid (as PO₃^3-)

< 4.0%

CaSequestrantion, CaCO₃ mg/g

> 450

● Application

The product can be used for cooling/boiler water treatment, secondary oil recovery and desalination.

● Package

Packed in PE drums (250 kg or 200 L for each)

● Safety

Avoid contact with skin.

Amino Trimethylene Phosphonic Acid

ATMP is a phosphonate widely used in cooling or boiler water treatment system as scale and corrosion inhibitor.

● Specification

Test parameters

Properties

Appearance

Clear,water-white to pale yellow solution

Total active content

48.0%-52.0%

pH (1% solution)

≤2.0

Specific gravity (20 ℃), g/cm³

1.31-1.35

Iron, mg/L

< 10

Chloride (as Cl^-)

< 1.0 %

CaSequestrantion, CaCO₃ mg/g

> 400

● Application

The product can be used as an important ingredient of many water treatment chemicals. It is cost-saving and can realize synergistic performance.

● Package

Packed in PE drums (250 kg or 200 L for each)

● Safety

Avoid contact with skin.

Hydroxy Ethylidene-1, 1-Diphosphonic Acid (HEDP)

HEDP is a multifunctional phosphonate offering all the properties of polyphosphates, phosphate esters, polymers and chelating agents.

● Specification

Test parameters

Properties

Appearance

Clear,water-white to pale yellow solution

Active content

58.0%-62.0%

pH (1% solution)

≤2.0

Specific gravity (20 ℃)

1.42-1.47

Iron (Fe), mg/L

< 10

CaSequestrantion, CaCO₃ mg/g

> 450

Phosphorous acid (as PO₃^3-)

< 2.0%

Phosphoric acid (as PO₄^3-)

< 0.8%

● Application

HEDP is applied as a scale control agent for cooling water treatment and can improve corrosion control, inhibit iron fouling and assist dispersion of solids.

● Package

Packed in PE drums (250 kg or 200 L for each)

● Safety

Avoid contact with skin.

2-Phosphonobutane-1, 2, 4-Tricarboxylic Acid (PBTC)

PBTC is a multifunctional molecule offering the properties of polyphosphates and aminocarboxylate chelating agent. It has excellent thermal hydrolytic stability compared with polyphosphates.

● Specification

Test parameters

Properties

Appearance

Colorless to pale yellow clear solution

pH (1% solution)

1.5-1.9

Specific gravity (20 ℃)

1.27-1.31

Iron (Fe), mg/L

< 10

Chloride (as Cl^-), mg/L

< 10

Phosphorous acid (as PO₃^3-)

< 0.5%

Phosphoric acid (as PO₄^3-)

< 0.5%

● Application

The product can be used for cooling/boiler water and oilfield wastwater treatment.

● Package

Packed PE drums (250 kg or 200 L for each)

● Safety

Avoid contact with skin.

3. Corrosion Inhibitor

Crrosion Inhibitor (CI-2)

The product is a kind of imidazole derivant with good solubility in water.

● Specification

Test parameters

Properties

Appearance

Light yellow to drab liquid

Specific density (20 ℃)

0.9-1.2

Solubility

Dissolved in water easily

9-11

● Application

The product can inhibit the corrosion created by high salinity of oilfield produced water containing carbon dioxide H₂S. It can effectively control the corrosion of tube and equipment caused by reinjected water. It has a good compatibility with other chemicals.

● Package

Packed in plastic drums (25 kg for each) or metallic drums (159 L for each)

● Safety

Avoid contact with the skin and eyes.

HCI Series Corrosion Inhibitor

The product is mainly formulated with imidazole derivant, and supplemented with adsorptive chemicals made of organic quaternary ammonium, polybasic phosphate ester, etc. By adding this agent, one stable and compact protection film can be formed.

● Specification

Test parameters

Properties

HCI (water soluble)

HCI (oil soluble)

Aapparence

Orange or brown Liquid

Brown Liquid

Specific gravity (20 ℃)

1.000-1.150

0.850-1.250

Solubility, 1% (m/V)

Homogeneous solution

Insoluble

Effectiveness content

≥25.0%

≥30.0%

6.5-7.5

5.0-7.5

Freezing point, ℃

≤-5

≤-10

● Application

The product can be used in cooling water, industrial water, and oilfield produed water, injected water and high water content crude oil in gathering pipes.

● Package

Packed in galvanizeddrums (200 L for each) or ISO tanks (1000 L for each)

● Safety

Avoid contact with the eyes and skin.

4. Bactericide

Bactericide (KB-904)

KB-904 is a kind of high effective bactericide composed of quaternary ammonium salts and aldehydes. It is soluble completely in water (but not in oil) and can effectively control corrosion by S.R.B (sulfate reducing bacterium), and other bacteria in oil field injected water system.

● Specification

Test parameters

Properties

Appearance

Colorless or light yellow liquid

Specific gravity

1.05

4-5

Flash point

None

Freezing point, ℃

≤ -10

● Application

The product can be used in water treatment, water injection and cooling water system. It can be fed continuously with a dosage 10-20 mg/L or batch added with a dosage 100-200 mg/L a week.

● Package

Packed in plastic pails (25 kg for each) or metallic drums (200 L for each).

● Safety

Avoid contact with skin and eyes. Store in a dry place, away from sources of heat and ignition.

HBA Series Bactericide

The products are made of dodecyl dimethyl benzyl ammonium chloride supplemented with other oilfield auxiliary agents. HBA bactericides are widely adaptable and powerful to control sulfate reducing bacterium, saprophytic bacteria and ferric bacteric, especially when bacteria in water are drug-fast.

● Properties

Test parameters

Properties

HBA (sigle component)

HBA (compound)

Apparence

Colorless or amber liquid

Specific density (20 ℃)

0.900-1.000

0.950-1.050

Solubility (1% aq. solution)

Homogeneous solution

Effective content

≥20%

≥35%

pH (1% solution)

6.5-8.0

Bactericidal efficiency (50mg/L)

≥99%

● Application

HBA bactericide is suitable for killing bacteria and alga existed in circulating cooling water, industrial water, oilfield produced water and injected water. Its dosage is 50 mg/L-80 mg/L, and the detailed dosage should depend on laboratory tests and field tests.

● Package

Packed in metallic drums (200 L for each) or ISO tank (1000 L for each)

● Shelf life

Two years

● Safety

Avoid contact with skin and eyes.

Store in a dry place, away from sources of heat and ignition.