oilfield chemicals

Alkaline-Surfactant-Polymer (ASP) Flooding System

Alkaline-Surfactant-Polymer (ASP) flooding is a combined EOR chemical system that synergizes alkali (sodium carbonate or sodium hydroxide), surfactant, and polymer to maximize oil displacement and sweep efficiency in mature waterflooded reservoirs. The alkali reacts with crude oil acidic components to generate in-situ surfactants, reducing the required dosage of injected surfactant by 30–50%. Widely deployed in major Chinese oilfields (Daqing, Shengli) with incremental recovery of 15–20% OOIP.

oilfield chemicals

Ammonium Bisulfite Oxygen Scavenger for Drilling Fluids

CAS: 10192-30-0

Ammonium bisulfite is a fast-reacting oxygen scavenger used to remove dissolved oxygen from drilling fluids, completion fluids, and workover brines, preventing oxygen-induced corrosion of drill string, casing, and downhole equipment. It reacts stoichiometrically with dissolved O₂ to form ammonium sulfate, achieving oxygen levels below 20 ppb within minutes. Supplied as a concentrated aqueous solution for easy injection.

oilfield chemicals

Ammonium Persulfate Fracturing Fluid Gel Breaker

CAS: 7727-54-0

Ammonium persulfate is an oxidative gel breaker used to degrade guar gum and HPG fracturing gels after proppant placement, enabling rapid flowback of broken fluid and cleanup of the fractured formation. It generates free radicals upon thermal activation that cleave polysaccharide chain bonds, reducing gel viscosity below 5 cP for effective cleanup. Typical dosage is 1–10 lb/Mgal depending on gel loading and bottom-hole temperature.

oilfield chemicals

Asphaltene Inhibitor Dispersant

Asphaltene inhibitor is an aromatic resin-based dispersant that prevents asphaltene aggregation, flocculation, and deposition in production tubing, surface facilities, and crude oil pipelines. It stabilizes asphaltene particles in the crude oil matrix by steric and electrostatic mechanisms, significantly reducing plugging incidents. Effective at dosages of 50–500 ppm and compatible with oil-based and mixed injection systems.

oilfield chemicals

Barite Weighting Agent for Drilling Fluids

CAS: 13462-86-7

API-grade barite (barium sulfate) is the industry-standard weighting agent for increasing the density of water-based and oil-based drilling fluids to control formation pressure and prevent wellbore kicks. With a specific gravity of 4.2 g/cm³, it allows mud density to be raised up to 2.65 g/cm³ (22.0 ppg) without excessive solids loading. API-grade barite meets the stringent specifications of API 13A for soluble Ba, Cd, Hg, and Pb content.

oilfield chemicals

Borate Crosslinker for Fracturing Fluids

Borate crosslinker is an aqueous alkaline solution of sodium or potassium tetraborate used to crosslink guar gum and hydroxypropyl guar (HPG) base fluids into high-viscosity elastic gels for hydraulic fracturing. Crosslinked gels achieve viscosities of 1000–5000 cP, providing superior proppant transport and fracture width support compared to uncrosslinked fluids. Borate crosslinks are thermally reversible, allowing effective gel breaking and cleanup after fracturing.

oilfield chemicals

Calcium Chloride Cement Accelerator

CAS: 10043-52-4

Calcium chloride (CaCl₂) is an effective cement accelerator used in shallow, cold-temperature oil well cementing operations to shorten the thickening time and compressive strength development of Portland cement slurries. At dosages of 1–4% BWOC, it can reduce the time to 500 psi compressive strength by 30–60%. Anhydrous and flake grades are both used in oilfield cementing, with flake grade preferred for on-site mixing.

oilfield chemicals

Carboxymethyl Hydroxyethyl Cellulose (CMHEC) Fluid Loss Additive

CMHEC (Carboxymethyl Hydroxyethyl Cellulose) is a dual-substituted cellulose ether used as a fluid loss control agent in cement slurries, drilling fluids, and completion fluids. It provides excellent filtration control under both static and dynamic conditions and at temperatures up to 150°C. CMHEC is particularly valued for its ability to provide simultaneous fluid loss control and mild viscosification in cement slurries without excessive retardation.

oilfield chemicals

Citric Acid Iron Control Agent

CAS: 77-92-9

Citric acid is used as an iron control agent in acidizing, fracturing, and drilling fluid applications to prevent the precipitation of iron hydroxide (Fe(OH)₃) and iron sulfide (FeS) that would cause severe formation damage and plugging. It chelates ferric ions (Fe³⁺) in acid solution, maintaining iron in solution and preventing gelatinous precipitates from plugging pore throats or perforations. Typical dosage is 20–100 lb/Mgal in acid systems.

oilfield chemicals

DTPMP Scale Inhibitor (Diethylenetriamine Penta(methylene phosphonic acid))

CAS: 15827-60-8

DTPMP is a high-performance phosphonate sequestrant and scale inhibitor used extensively in oilfield produced water and injection water treatment. With five phosphonate groups, it provides superior chelation of calcium, magnesium, barium, and strontium ions, effectively preventing scale deposition in pipelines and downhole equipment. It is compatible with most oilfield biocides and corrosion inhibitors.

oilfield chemicals

Drilling Mud Lubricant for Drill Bit and String

Drilling mud lubricant is a synthetic or fatty acid ester-based additive that reduces torque and drag on the drill string, BHA, and drill bit during directional and horizontal drilling operations. It reduces the coefficient of friction by up to 70% in water-based mud systems and is effective in both clay-inhibited and salt-saturated drilling fluids. The product helps extend bit life, reduce stuck pipe incidents, and improve drilling efficiency in extended-reach wells.

oilfield chemicals

Enhanced Oil Recovery Surfactant Microemulsion

Enhanced oil recovery (EOR) surfactant microemulsion is a tailored blend of anionic and non-ionic surfactants formulated to achieve ultra-low interfacial tension (IFT) between crude oil and brine, mobilizing residual oil in depleted reservoirs. It reduces oil-water IFT to below 10⁻³ mN/m, enabling displacement of trapped oil from pore spaces inaccessible to conventional waterflooding. Optimized for specific crude oil types and reservoir salinity conditions.

oilfield chemicals

Filming Amine Corrosion Inhibitor

Filming amine corrosion inhibitor is a long-chain fatty amine derivative that forms a durable monomolecular protective film on metal surfaces in oil and gas production systems. It is highly effective in sweet (CO₂) and sour (H₂S) environments, including multiphase flow conditions with mixed oil-water-gas streams. The product achieves corrosion inhibition efficiencies above 90% in both batch and continuous injection applications.

oilfield chemicals

Fluorosurfactant Wetting Agent for Oilfield

Fluorosurfactant wetting agent is a perfluoroalkyl or fluorotelomer-based surfactant used in oilfield applications to alter reservoir rock wettability from oil-wet to water-wet, improving water flood displacement efficiency. At concentrations as low as 50–500 ppm, it dramatically reduces surface and interfacial tension, enabling superior water spreading and penetration into tight pore structures. It is used in stimulation pre-flush, EOR wettability modification, and drilling fluid additive applications.

oilfield chemicals

Guar Gum Fracturing Fluid Base

CAS: 9000-30-0

Oilfield-grade guar gum is the primary viscosifier and proppant carrier used in hydraulic fracturing fluids. Hydrated at 20–40 lb/Mgal, it builds sufficient viscosity (50–500 cP) to transport proppant deep into created fractures while maintaining good fluid leakoff control. High-purity fast-hydrating grades (≥85% through 200 mesh) are formulated for compatibility with borate and zirconate crosslinkers in modern frac fluid systems.

oilfield chemicals

HEDP Scale Inhibitor (Hydroxyethylidene Diphosphonic Acid)

CAS: 2809-21-4

HEDP is a highly effective phosphonate scale and corrosion inhibitor widely used in oilfield water treatment, cooling water systems, and injection water management. It demonstrates excellent inhibition against calcium carbonate, calcium sulfate, and barium sulfate scales at low dosage levels (2–20 ppm). HEDP is stable under high-temperature conditions up to 200°C and exhibits strong chelation of metal ions.

oilfield chemicals

Hydrolyzed Polyacrylamide (HPAM) EOR Polymer

Hydrolyzed Polyacrylamide (HPAM) is the world's most widely used polymer for chemical enhanced oil recovery (EOR), providing mobility control in waterfloods by increasing the viscosity of the injected water phase. At typical field concentrations of 500–2000 ppm, it increases water viscosity from 1 to 10–40 mPa·s, improving sweep efficiency and reducing water channeling through high-permeability streaks. Molecular weight grades from 5 to 35 million Daltons are available to match reservoir conditions.

oilfield chemicals

H₂S Scavenger Triazine

H₂S scavenger triazine is a water-soluble, non-regenerable chemical used for the removal of hydrogen sulfide from produced gas, crude oil, and water streams in oilfield operations. Based on triazine chemistry (reaction product of monoethanolamine and formaldehyde), it irreversibly reacts with H₂S to form water-soluble, non-toxic dithiazine byproducts. Effective for H₂S concentrations from trace levels up to 5000 ppm.

oilfield chemicals

Imidazoline Corrosion Inhibitor for Oil Wells

CAS: 27136-73-8

Imidazoline-based corrosion inhibitor is a nitrogen-containing heterocyclic compound widely used to protect steel surfaces in oil and gas production against CO₂, H₂S, and organic acid corrosion. It forms a protective adsorbed film on metal surfaces, achieving corrosion protection efficiency above 95% in harsh sour and sweet service conditions. Suitable for use in production tubing, pipelines, and surface facilities.

oilfield chemicals

Kinetic Hydrate Inhibitor (KHI) Polymer

Kinetic Hydrate Inhibitor (KHI) is a low-dosage hydrate inhibitor (LDHI) based on polyvinylcaprolactam (PVCap) or polyvinylpyrrolidone (PVP) that delays hydrate nucleation and crystal growth rather than thermodynamically shifting equilibrium conditions. Effective at concentrations of 0.1–1.0 wt%, representing a 30–60-fold dosage reduction compared to MEG, making it cost-effective and preferred for low water-cut flowlines.

oilfield chemicals

Lignosulfonate Cement Setting Retarder

Calcium or sodium lignosulfonate is a widely used cement retarder in oil well cementing operations that extends the thickening time of Portland cement slurries to allow safe placement in deep, hot, or long casing strings. It is effective over a temperature range of 60–150°C at dosages of 0.1–0.5% by weight of cement (BWOC). Lignosulfonate retarders are cost-effective and compatible with most fluid loss agents and dispersants used in oilfield cementing.

oilfield chemicals

Mercaptobenzothiazole (MBT) Copper Corrosion Inhibitor

CAS: 149-30-4

Mercaptobenzothiazole (MBT) is a highly effective copper and copper alloy corrosion inhibitor used in oilfield cooling water systems, heat exchangers, and process equipment protection. It forms a stable chelate complex with copper ions on metal surfaces, providing excellent protection against copper corrosion from dissolved oxygen, CO₂, and chloride ions at dosages of 1–10 ppm. MBT also exhibits moderate inhibition of iron and zinc in water treatment systems.

oilfield chemicals

Monoethanolamine (MEA) Hydrate Inhibitor

CAS: 141-43-5

Monoethanolamine (MEA) is used in oilfield and gas processing operations as a thermodynamic hydrate inhibitor and acid gas (CO₂/H₂S) scavenger. As a hydrate inhibitor, it depresses the hydrate formation temperature in gas pipelines and subsea flowlines. MEA is also widely used in gas sweetening plants to remove CO₂ and H₂S from natural gas streams, with regeneration efficiency above 90%.

oilfield chemicals

Monoethylene Glycol (MEG) Hydrate Inhibitor

CAS: 107-21-1

Monoethylene Glycol (MEG) is the industry-standard thermodynamic hydrate inhibitor for offshore gas and condensate pipelines, injected at concentrations of 30–60 wt% to depress hydrate formation temperatures by 10–25°C. MEG can be fully recovered and regenerated in onshore MEG reclamation units (MRUs), making it economically preferred for high-volume offshore applications. It also provides mild corrosion protection when combined with pH management.