HYSLIC Fracturing Fluid Series: Iron-Tolerant, Multi-Functional Performance in One System
Designing fracturing fluids that hold up in high-TDS, high-iron plays remains one of the tougher problems in completions engineering. Dissolved iron reacts with conventional polyacrylamide friction reducers, producing gelatinous precipitates that plug formations, cause near-wellbore damage, and compromise hardware and flow within tubulars and surface equipment. The typical fix usually includes more FR, chelants, dispersants, and pH adjustment along with equipment adding cost and complexity to every pad.
The HYSLIC series was developed as a direct answer to these challenges. This patented, multi-functional family of friction reducers and gelling agents works as slickwater FR at low loadings, transitions to HVFR/linear gel at mid-range concentrations, and accepts borate crosslinkers for crosslinked-fluid behavior at higher dosages, all from one chemistry platform. The result is simplified logistics, fewer additives, and flexible job design for completions teams working iron-rich, variable-water quality basins like the Mid-Con and the Montney.
TL;DR
- The HYSLIC Fracturing Fluid Series is a patented line of iron-tolerant, multi-functional friction reducers and gelling agents from Sunita Hydrocolloids, built for high-TDS, high-iron completions.
- The HYSLIC family works in brines up to 250,000 TDS, resists iron-induced “gummy bear” precipitation, and transitions from slickwater FR to HVFR/linear gel to crosslinked fluid by adjusting concentration; no separate guar system required.
- Each formulation can be customized to match specific basin conditions and client requirements. Fewer chemicals, simpler logistics, more predictable fluid behavior.
Why iron and complexity break typical friction reducers
Most friction reducers in hydraulic fracturing are polyacrylamide-based. They perform well in clean fresh water but degrade when they encounter dissolved ferric iron (Fe3+), which is common in deep formations rich in pyrite and siderite. A comprehensive review in npj Materials Sustainability confirmed that polyacrylamide derivatives remain the dominant FR chemistry, making this iron vulnerability an industry-wide problem.
Iron reacts with the polyacrylamide chain, causing precipitation into rubbery, semi-solid masses the industry calls “gummy bears.” Research published in the Journal of Petroleum Technology documented these accumulations in basins like the Woodford. The consequences go beyond fouled surface equipment: these gelatinous masses plug up the formation, create near-wellbore damage, and compromise hardware and flow within the tubulars and surface hardware. The result is degraded friction reduction, higher pump pressures, increased production costs and compromised well productivity.
Operators typically respond by stacking additional chemistry chelating agents, dispersants, and extra FR in each with its own tank, dosing pump, and mixing protocol. In high-iron, high-TDS basins like the Mid-Con and the Montney where produced-water reuse is standard, that additive stack gets expensive and unwieldy fast. Early work on iron-resistant FR formulations, such as findings presented at the Unconventional Resources Technology Conference, pointed to the need for purpose-built chemistry. The HYSLIC series was developed to short-circuit that cycle.
Patented HYSLIC chemistry: what makes it different
The HYSLIC family comprises newly developed and patented friction-reducing agents for oil and gas stimulation. That patent protection signals genuine differentiation from commodity polyacrylamide FRs.
The series includes formulations built on both polyacrylamide and alternative polymer backbones. One member of the family is a completely natural polymer product, filling a gap for operators seeking non-synthetic chemistry options or pursuing ESG-driven diversification goals.
The shared design philosophy across the HYSLIC family is multi-functional behavior from one platform. Instead of stocking separate slickwater FR, guar-based gelling agent, and crosslinker package, engineers adjust HYSLIC concentration and crosslinker selection to cover all three roles. This allows Sunita Hydrocolloids to customize solutions for clients with specific requirements, whether that means matching a particular brine profile, meeting regulatory mandates, or optimizing cost per stage across a multi-well program.
Iron-tolerant, “anti-gummy bear” performance
The defining advantage of the HYSLIC series is iron tolerance. Where most friction reducers react with dissolved iron to form agglomerations, HYSLIC is impervious to iron and therefore does not react. That means 100% of the product is used for the intended purpose. None of it is being tied up in a side reaction with iron or iron complexes.
In practical terms, this changes fluid behavior on location. No gelatinous masses plugging up the formation. No near-wellbore damage from precipitated polymer. No unexplained pressure spikes from fouled check valves or compromised tubulars. The polymer maintains friction reduction and viscosity-building characteristics even at iron concentrations that would cause standard FRs to precipitate.
This tolerance also cuts the need for chelating agents and dispersants, reducing both cost and on-location complexity. When the base FR handles variable iron loadings on its own, fluid behavior becomes predictable from stage to stage, a real advantage in basins where operators blend produced water with inconsistent iron content. The HYSLIC family performs in fresh water and brines up to 250,000 TDS, covering the full range of fracturing fluid water sources.
The HYSLIC product line: flagship performance and customizable solutions
HYSLIC 9900: the flagship performer
HYSLIC 9900 is the flagship multi-functional friction reducer and gelling agent, engineered for comprehensive fracturing programs in iron-challenged, high-TDS basins. At 2-8 ppt (0.5-2 gpt slurry), it delivers 60-90% friction reduction within 1-2 minutes across fresh water, 7% KCl, 150K TDS, and 231K TDS synthetic brines. Higher loadings build viscosity for proppant transport, and borate crosslinkers enable crosslinked-fluid behavior for demanding stages.
Available as dry polymer (powder, 0.6-0.9 relative density, pH 5-9) or slurry (1.03 +/- 0.2 SG, ~200 cps).
Best for: Deep shale wells (>8,000 ft) with high natural iron (pyrite/siderite) and produced-water blending, multi-stage programs needing FR to gel to crosslinked flexibility, and operators consolidating FR and guar inventories into one supply chain.
Customizable formulations for every basin
Beyond the flagship HYSLIC 9900, the HYSLIC family includes additional formulations that can be tailored to specific operational requirements. Sunita Hydrocolloids works with operators to customize treating ranges, polymer concentrations, and crosslinker packages based on basin-specific water chemistry, iron content, and job design.
Whether the application calls for lower gel-onset thresholds, finer concentration control across variable sand-loading stages, documented performance in extreme high-iron produced-water environments, or a completely natural polymer backbone for ESG-focused programs, the HYSLIC platform can be configured to match. This flexibility eliminates the one-size-fits-all limitation of commodity friction reducers and lets completions teams dial in fluid behavior for their specific conditions.
For operators in the Mid-Con and the Montney dealing with variable iron loads and high-TDS slickwater programs, customized HYSLIC solutions offer a path to predictable fluid performance without stacking additional chemistry.
One product platform, many roles: FR to HVFR/linear gel to crosslinked fluid
The HYSLIC series delivers concentration-driven versatility. Low loadings provide friction reduction in tap water and high-TDS brines. Mid-range concentrations build viscosity for proppant suspension, replacing the role traditionally filled by guar-based linear gels. Adding borate crosslinkers at higher loadings enables sustained crosslinked-fluid behavior for high-proppant stages.
This means no separate guar system on location, fewer tanks, a simpler pumping schedule, and one set of SDS and handling procedures across the entire job. Lab flow loop tests and viscosity profiles under various TDS conditions confirm strong friction reduction even in 231K TDS brines, with viscosity scaling predictably by concentration. For teams running multi-stage pads in variable-water basins, that consistency cuts planning cycles and pre-job lab iterations.
Simplifying frac locations: fewer chemicals, smaller footprint
A typical multi-stage frac spread includes separate slickwater FR, HVFR or guar gel, crosslinker, and multiple support additives for pH buffering, iron control, and clay stabilization, each with its own tank, pump, and QA/QC protocol. On a multi-well pad, that footprint drives truck traffic, HSE exposure, and dosing-error risk.
HYSLIC compresses that stack. One polymer platform handles most of the schedule; concentration and crosslinker adjustments replace what previously required three or four separate products. The built-in iron tolerance further reduces the additive count.
Dry polymer ships via bulk pneumatic delivery for dry hydration systems; slurry arrives in totes or bulk containers, ready to pump. The operational bottom line: fewer tanks on location, simpler job design, and lower risk of wrong-product errors during pumping.
Well performance data: HYSLIC 9900 in the SCOOP/STACK
Lab data and spec sheets only tell part of the story. Production results from the field tell the rest.
A well study conducted in the SCOOP/STACK play compared 18 wells completed with HYSLIC 9900 against 26 offset wells located within a five-mile radius. Some of these were direct offsets on the same well pad. The two groups had comparable completion designs, which allowed for a controlled production comparison.
Completion comparison (HYSLIC 9900 vs. offset wells):
| TVD (ft) | Avg Prop./Stage (lbs) | Perf Interval (ft) | Lateral Length (ft) | Prop. Loading (#/gal) | Prop. Int. (#/ft) | |
| HYSLIC 9900 | 11,506 | 33,240,579 | 10,774 | 11,128 | 2.0 | 3,268 |
| Offset Wells | 11,837 | 33,706,119 | 10,056 | 10,473 | 1.91 | 3,351 |
Over the first 30 months of production, HYSLIC 9900 wells averaged 21% higher cumulative production (MBOE per 1,000 ft of lateral) compared to the offset wells completed with conventional friction reducers. This held true despite similar TVDs, lateral lengths, and proppant intensities between the two groups.
A 21% production uplift across 18 wells is not a single-well anomaly. It points to a measurable field-level advantage, likely tied to better fluid performance downhole: less polymer degradation from iron interference, cleaner fracture faces, and more effective proppant placement. For operators weighing FR selection on upcoming pads, this dataset offers a concrete benchmark.
FAQs on the HYSLIC Fracturing Fluid Series
In what water qualities can HYSLIC be used?
The HYSLIC family works in fresh water and brines up to approximately 250,000 TDS. For very high-TDS or mixed-water systems with unusual contaminant profiles, validate performance with lab testing using actual field samples before the job.
Can HYSLIC replace both slickwater FR and separate guar-based gel systems?
Yes. HYSLIC products function as friction reducers at lower loadings and transition to linear gel or crosslinked fluids at higher dosages, allowing many programs to run on a single polymer platform instead of stocking separate FR and guar-based gelling agents. Final design should account for specific reservoir conditions and lab testing.
How does Sunita Hydrocolloids customize HYSLIC for my specific application?
Sunita Hydrocolloids works directly with operators to tailor HYSLIC formulations based on basin-specific water chemistry, iron content, TDS levels, and job design requirements. Whether you need a natural polymer backbone, specific gel-onset thresholds, or optimized treating ranges for your produced-water profile, the team can configure a solution.
Request a custom formulation consultation to get started.
Are HYSLIC products biodegradable?
Yes. HYSLIC products are listed as biodegradable in their Technical Data Sheets. Biodegradable polymers reduce long-term environmental persistence, support regulatory alignment, and strengthen operator ESG narratives. Pair with proper wastewater treatment and disposal protocols for maximum environmental benefit.
Ready to evaluate HYSLIC on your next pad?
The HYSLIC series a patented, iron-tolerant, biodegradable family of friction reducers delivering FR, HVFR/linear gel, and crosslinked-fluid performance from one customizable platform was built for conditions that break commodity friction reducers. With 21% production uplift documented in SCOOP/STACK field data, compatibility with brines up to 250,000 TDS, and the ability to customize formulations to specific basin requirements, HYSLIC is designed to cut the additive count and location footprint on modern shale pads.
If iron, TDS variability, or fluid-system complexity are pain points on your current programs, HYSLIC is a strong candidate for side-by-side evaluation. Sunita Hydrocolloids can propose treating ranges, crosslinker packages, and handling guidance tailored to your basin and water source.
Get started:
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