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Chemicals for Wellbore and Pipeline: Viscosity Reducers, Pour Point Depressants, Asphaltene Dispersants & Drag Reduction Agents
Created on 08.26
Introduction: The Flow Assurance Challenge
Getting crude oil from the reservoir to the refinery is not simply a matter of pumping. Heavy oil is too viscous to flow, waxy crude solidifies at low temperatures, asphaltenes precipitate and block pipelines, and paraffin deposits choke wellbores. These flow assurance challenges cost the oil and gas industry billions of dollars annually in lost production, increased energy consumption, and remediation operations.
The global flow assurance chemicals market continues to grow as mature fields produce heavier, waxier, and more challenging crude oils. Paraffin inhibitors alone represent a market expected to exceed USD 750 million in the coming years.
Dongying Jusen Chemical supplies a complete range of Chemicals for Wellbore and Pipeline — viscosity reducers, pour point depressants, asphaltene dispersants, paraffin removers and inhibitors, and drag reduction agents — designed to keep crude oil flowing from the reservoir to the refinery.
Part I: Viscosity Reducer for Heavy Crude Oil
1. What Is a Heavy Oil Viscosity Reducer?
Heavy crude oil contains a high proportion of asphaltenes and resins, which increase viscosity and limit flow ability in porous media and pipelines. A viscosity reducer is a chemical additive that reduces heavy oil viscosity and improves fluidity, enhancing extraction and transportation efficiency while reducing energy consumption and costs.
Our viscosity reducers are compounded from various surfactants and work by reducing oil-water interfacial tension and seepage resistance. The active nano viscosity reducer molecules disrupt the stacking structure of asphaltene molecules, form stronger hydrogen bonds, and insert themselves into the asphaltene network, effectively breaking it down and lowering viscosity.
2. Technical Specifications
No. | Item | Indicator |
1 | Appearance | Uniform liquid, no impurities |
2 | pH | 6.0–9.0 |
3 | Water solubility | Soluble in water, no precipitation |
4 | Interfacial tension, mN/m | ≤9.9×10⁻² |
5 | Viscosity reduction, % | ≥80.0 |
6 | Organochlorine content, % | 0.0 |
3. Performance Data
Research on viscosity reducers for heavy oil recovery has demonstrated excellent performance:
- An active nano viscosity reducer developed for the Pingfangwang Oilfield (Shengli) achieved a viscosity reduction rate
exceeding 90% in the reservoir environment. The product lowered oil-water interfacial tension to 19.65 mN/m and achieved an oil film stripping efficiency of >90%. The active nano viscosity reducer exhibited a microscopic dispersion size of approximately 20 nm.
- A viscosity reducer system tested at the Yingxiongtan Oilfield achieved a viscosity reduction rate of
98.2% at 70°C with a 3:7 oil-water ratio. The system's enhanced oil recovery increment was 6.67%, significantly higher than the 2.18% achieved by conventional viscosity reducers.
- A novel water-soluble binary polymer viscosity reducer maintained a viscosity reduction rate
consistently above 97% as concentration increased from 0.1 to 0.3 wt%. For heavy oil with a viscosity of 4,889 mPa·s, the viscosity reduction rate exceeded 99%.
- A heavy oil viscosity reducer achieved a viscosity reduction rate of
95.2%, with recovery reaching 32.8% in laboratory oil displacement experiments — over 10% higher compared to water flooding, viscosity reducer flooding, and polymer flooding.
4. Application Methods
Viscosity reducers are used in heavy oil exploitation or gathering operations. They can be applied by continuous injection at the wellhead, squeeze treatment into the formation, or added to gathering pipelines. The recommended dosage depends on the oil viscosity and production method. For nano viscosity reducers, optimal concentration is typically 0.3 wt%.
Part II: Pour Point Depressant
1. What Is a Pour Point Depressant?
A pour point depressant (PPD) is a chemical additive that lowers the pour point of petroleum and oil products, improving their low-temperature fluidity. This reduces flow resistance in pipelines and improves transportation efficiency. Waxy crude oils, which contain high concentrations of paraffins with carbon chains ranging from C18 to C30+, are the primary target for PPD treatment.
PPDs work through two primary mechanisms: the nonpolar part co-crystallizes with wax molecules, while the polar part adsorbs asphaltenes and resins onto the crystal surface, preventing the formation of large wax crystal networks that cause gelling.
2. Product Types
Product Type | Suitable Wax Carbon Chain | Characteristics |
EVA modification | C18–C24 | For crude oil or diesel with medium wax chains |
Polymethacrylate | C18–C20 | For crude oil or diesel with shorter wax chains |
Maleic anhydride copolymer | C20–C30 | For crude oil with longer wax chains, low dosage |
Nitrogenous polymer | C30+ | For crude oil with very long wax chains, low dosage |
3. Technical Specifications
No. | Item | Indicator |
1 | Appearance (25°C) | Light yellow-reddish brown liquid/solid |
2 | Density (25°C), g/cm³ | 0.85–0.95 |
3 | Flash point, °C | >25 |
4. Performance Data
- An EVA/SiO₂ nanocomposite pour point depressant lowered the pour point of Indian waxy crude oil by
17°C and reduced viscosity by 83.9% at 25°C and 97.5% at 40°C at an optimal dosage of 1,500 ppm. The wax appearance temperature dropped from 62°C to 32°C, and the gelation temperature dropped from 52°C to 24°C. Flow-loop testing showed an 88% reduction in pressure drop gradient at 40°C.
- A maleic anhydride–ene monomer multicomponent copolymer PPD for Shengli crude oil demonstrated the ability to depress the pour point by
12°C. Polymers containing long alkyl side chains and aromatic units displayed the most impressive performance.
- A PPD product added at 1,500–2,200 ppm reduced the pour point of a high-wax African crude oil from approximately 33°C to below 24°C, matching the performance of a leading international product
.
- Acrylate-maleic anhydride copolymers reduced the pour point of Daqing crude oil by
5. Application Methods
PPDs are typically injected into the crude oil stream at the wellhead or at pipeline entry points. The optimal dosage ranges from 1,500 to 2,200 ppm, depending on the crude oil composition and operating conditions. For best results, PPD should be combined with proper heat treatment and pipeline operating temperature management.
Part III: Asphaltene Dispersant
1. What Is an Asphaltene Dispersant?
Asphaltene dispersants weaken the surface tension between asphaltene molecules, disperse them into small particles, and prevent gum and asphaltene molecules from accumulating into piles. This effectively prevents precipitation and wall formation in heavy oil wells and pipelines. Unlike asphaltene inhibitors — which prevent precipitation — dispersants are used to remediate existing deposits and prevent further agglomeration.
2. Product Type
Product Type | Characteristics |
Surfactants | Strong dispersion effect on gum and asphaltene in high-viscosity heavy oil |
3. Technical Specifications
No. | Item | Indicator |
1 | Appearance | Yellow to brown uniform liquid |
2 | Active content, % | ≥30 |
3 | Density @ 25°C, g/cm³ | 0.80–1.00 |
4 | Flash point, °C | ≥60 |
5 | Condensation point, °C | ≤−15 |
4. Performance Data
A high-efficiency asphaltene dispersant (LYH-1) was developed for the Tahe Oilfield wellbore lifting process, where asphaltene precipitation and deposition caused severe blockage. Testing at 50°C showed that 5 g of LYH-1 dissolved 1 g of asphaltene deposit with a dissolution rate of 97%. The dispersed asphaltenes remained stable without re-aggregation over extended periods. The dispersant works primarily through hydrogen bonding and π-π interactions with asphaltene deposits, reducing aggregate particle size and keeping them stably suspended in solution.
5. Application Methods
Asphaltene dispersants are applied by continuous injection into the wellbore or pipeline, or by batch treatment for remediation of existing deposits. The dispersant can be used in both oil wells and surface pipelines. For preventive treatment, dosage typically ranges from 0.1 to 1 part dispersant per 100 parts asphaltene deposit.
Part IV: Paraffin Remover and Inhibitor
1. What Is a Paraffin Remover and Inhibitor?
A paraffin remover and inhibitor is a dual-function chemical that both removes existing wax deposits and prevents future wax deposition. It effectively dissolves or disperses wax deposits, ensuring smooth flow of crude oil. The product simultaneously prevents wax crystal deposition, providing both removal and inhibition in a single treatment.
2. Product Type
Product Type | Characteristics |
Surfactants | Efficiently remove wax deposition in oil wells |
3. Technical Specifications
No. | Item | Indicator |
1 | Appearance | Homogeneous liquid |
2 | Flash Point, °C | >25 |
3 | Carbon bisulfide, % | 0 |
4 | Organochlorine, % | 0.0 |
Additional specifications:
Item | Indicator |
Density @ 25°C, g/cm³ | 0.80–1.00 |
Solubility | Oil soluble |
Condensation point, °C | ≤−15 |
pH value | 7.0–10.0 |
Wax dissolution rate, g/min | ≥0.025 |
Wax inhibition rate, % | ≥20 |
4. Performance Data
- An oil-soluble paraffin remover and inhibitor achieved a wax dissolution rate of
≥0.048 g/min and a wax inhibition rate of ≥40.4%, providing effective dual-function performance for both removal and prevention of wax deposition.
- A paraffin remover used in the Xinanbian block achieved a wax dissolution rate of
0.025 g/min and a wax inhibition rate of 38.53%. Field application on four high-wax oil wells extended the average paraffin removal cycle from 1.57 months to 5.2 months, reducing the annual paraffin removal frequency by an average of 5.3 times per well.
- A high-wax crude oil paraffin remover and inhibitor for Chad crude oil achieved a wax inhibition rate of
45.4%, a wax dissolution rate of 0.044 g/min, and a viscosity reduction rate of 78.8%, outperforming similar commercial products.
5. Application Methods
Paraffin removers and inhibitors are applied by continuous injection into the wellbore or by batch treatment. They can also be used for surface pipeline cleaning. The dual-function nature of the product means it can be applied preventively without waiting for wax to accumulate.
Part V: Drag Reduction Agent
1. What Is a Drag Reduction Agent?
A drag reduction agent (DRA) is a high-molecular-weight polymer that significantly reduces the flow resistance of fluids in pipelines, improving transportation capacity and reducing energy consumption. DRAs are widely used in the transportation of crude oil and finished oil pipelines.
The DRA works by suppressing turbulence in the pipeline flow, allowing the oil to flow more efficiently at the same pumping pressure — or the same flow rate at lower pumping pressure.
2. Product Type
Product Type | Characteristics |
High-molecular polymer | Reduce crude oil pipeline transportation resistance |
3. Technical Specifications
No. | Item | Indicator |
1 | Appearance | White to pale yellow |
2 | Density @ 20°C, g/cm³ | 0.80–0.90 |
3 | Flash point, °C | >61 |
4. Performance Data
- A high-efficiency composite drag reducer using KH550/KH560 coupling agents on nano-SiO₂ with PAO grafting achieved a viscosity retention rate of
71.6% after 30 minutes at 1,000 s⁻¹ high shear rate, compared to 57.0% for conventional PAO drag reducers. Field application achieved a throughput increase of 38.8% and drag reduction rate of 48.9%, with annual electricity savings of 415,000 kWh.
- A bio-derived cashew nut shell liquid (CNSL) DRA achieved a maximum drag reduction of
92.3% at only 10 ppm in the transitional-turbulent regime (Re ≈ 2,622), approaching Virk's asymptote of approximately 84%. Commercial polyacrylamide (PAM) reached 89.9% at the same concentration.
- Sodium dodecyl sulfate as a DRA in crude oil pipelines achieved a maximum drag reduction of
53.9% in spiral pipes and 47.5% in circular pipes at 0.1% additive concentration.
- A field trial of FLO-MAX drag reducer on the Jihui crude oil pipeline validated effective drag reduction and throughput increase across different injection concentrations
.
5. Application Methods
DRAs are injected continuously into the pipeline using metering pumps. The typical dosage ranges from 10 to 60 ppm, depending on the crude oil properties, pipeline diameter, and flow regime. Optimal performance is typically achieved at intermediate pipe diameters where turbulence intensity is optimal for additive interaction.
Complete Product Portfolio Summary
Category | Product | Main Function | Key Performance |
Viscosity Reducer | Surfactant blends, nano viscosity reducers | Reduce heavy oil viscosity, improve fluidity | Viscosity reduction ≥80% (up to 99%) |
Pour Point Depressant | EVA, Polymethacrylate, Maleic anhydride copolymer, Nitrogenous polymer | Lower pour point, improve low-temperature flow | Pour point reduction up to 17°C |
Asphaltene Dispersant | Surfactants | Disperse asphaltene deposits, prevent blockage | Dissolution rate up to 97% |
Paraffin Remover & Inhibitor | Surfactants | Remove and prevent wax deposition | Wax dissolution ≥0.025 g/min; Inhibition ≥20% |
Drag Reduction Agent | High-molecular polymer | Reduce pipeline flow resistance, save energy | Drag reduction up to 92% at 10 ppm |
Why Choose Jusen Chem?
- Complete range:
Viscosity reducers, pour point depressants, asphaltene dispersants, paraffin removers, and drag reduction agents from a single supplier
- Field-proven:
Products supplied to major Chinese oilfields including Shengli, Tahe, and Xinjiang, with successful field applications
- Technical support:
Our team can help select the right product and dosage for your specific crude oil conditions
- Direct manufacturer:
Stable supply and factory-direct pricing
- Fast delivery:
Efficient logistics from China to global markets
- Customizable formulations:
Products can be tailored to your specific crude oil properties
FAQ
Q1: What is the difference between a viscosity reducer and a pour point depressant?
A viscosity reducer reduces the viscosity of heavy crude oil to improve fluidity during extraction and transportation. A pour point depressant lowers the temperature at which waxy crude oil solidifies, improving low-temperature flow properties. Both improve flow, but they target different flow assurance challenges.
Q2: What is the recommended dosage for the viscosity reducer?
The recommended dosage depends on the oil viscosity and production method. For nano viscosity reducers, optimal concentration is typically 0.3 wt%. For conventional viscosity reducers, laboratory testing is recommended to determine optimal dosage.
Q3: What type of pour point depressant should I choose for my crude oil?
The selection depends on the wax carbon chain distribution. EVA modification is suitable for C18–C24 wax chains, polymethacrylate for C18–C20, maleic anhydride copolymer for C20–C30, and nitrogenous polymer for C30+. Our technical team can recommend the best type based on your crude oil analysis.
Q4: How do asphaltene dispersants work?
Asphaltene dispersants weaken the surface tension between asphaltene molecules through hydrogen bonding and π-π interactions, reducing aggregate particle size and keeping them stably suspended in solution, preventing precipitation and wall formation.
Q5: What is the difference between a paraffin remover and a paraffin inhibitor?
A paraffin remover dissolves existing wax deposits. A paraffin inhibitor prevents wax from depositing in the first place. Our dual-function products provide both removal and inhibition in a single treatment.
Q6: How much drag reduction can I expect from your DRA?
Our drag reduction agents can achieve drag reduction rates of 48–92%, depending on the product type, dosage, pipeline diameter, and flow regime. Field-proven performance includes 48.9% drag reduction with 38.8% throughput increase in crude oil pipeline applications.
Q7: Can you provide samples?
Yes, samples can be provided for evaluation. Please contact us with your specific requirements and crude oil properties.
Contact Us
For quotations, technical data sheets, or samples of Chemicals for Wellbore and Pipeline, please contact us:
📧 Email: info@jusenchem.com
📞 WhatsApp: +86 18954690080
🌐 Website: www.jusenchem.com
Jusen Chem — your reliable partner for wellbore and pipeline flow assurance chemicals.
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