RiForce SFA-1: More Compressive Strength Without Silica Fume
Silica fume has long been a go-to for cement slurries that need more strength, but it often brings sourcing headaches and added cost along with it. RiForce™ SFA-1 is a multipurpose compressive strength additive built as a cost-effective alternative. It raises early and ultimate compressive strength while also improving viscosity and free water control, in all oilfield cements above 120°F (49°C).
RiForce™ SFA-1
Temperature range
120°F and above
Typical concentration
1% to 5% bwoc
High-performance slurries
Up to 10%+ bwoc
Cement compatibility
All oilfield-grade systems
Strength requirements are getting harder to ignore
Many cement jobs now have to hit specific compressive strength targets, whether set by local regulations or by the well design itself. Meeting those targets usually means adding something to the slurry, and every additive brings its own cost, handling, and compatibility considerations.
Silica fume has filled that role for years because it does more than add strength. Its fine particles help pack the cement matrix, cut permeability, and hold water in the slurry. RiForce SFA-1 was developed to deliver those same kinds of multipurpose benefits in a more cost-effective package, so operators can meet strength requirements while keeping slurry designs simple.
One additive doing three jobs
RiForce SFA-1 is efficient because it addresses several slurry properties at once, which can reduce the number of separate additives a design needs.
Compressive strength
Increases both early and ultimate compressive strength, helping slurries meet regulatory and design targets.
Viscosity
Adds viscosity to the slurry, supporting stability during placement.
Free water control
Reduces free water and segregation so the slurry stays uniform as it sets.
Features and advantages
Enhances early and ultimate compressive strength
Provides viscosity enhancement and free water control
Compatible with all oilfield-grade cement systems
Simplifies design with multipurpose functionality
SFA-1 or CS-10? Start with temperature
RiForce SFA-1 is designed for wells above 120°F. For lower-temperature jobs, Riteks' more aggressive RiForce CS-10 is the better fit. Move the slider to your well temperature to see which one applies.
180°F
40°F120°F300°F+
RiForce CS-10RiForce SFA-1
RiForce SFA-1 is designed for this temperature.
Estimate your SFA-1 loading
RiForce SFA-1 is dosed by weight of cement (bwoc). Enter the size of your job and a target concentration to get a quick estimate.
3% bwoc
Within the typical 1% to 5% range.
1,410 lb
RiForce SFA-1 needed
47,000 lb
Total cement
Estimate only. Confirm final loading through lab testing against your slurry design.
Need to hit a compressive strength target? See the full RiForce SFA-1 product details.
Compressive strength developmentRaises early and ultimate strength to meet regulatory and design requirements.
Cost-effective silica fume alternativeDelivers multipurpose performance without the cost of traditional silica fume.
Permeability and fluid lossHelps reduce permeability and fluid loss in the set and setting cement.
Particle packing densityImproves how tightly the cement matrix packs together.
Free water and segregationKeeps water in the slurry and solids evenly distributed.
Bonding to casing and formationSupports improved bond at both the casing and formation interfaces.
Strength retrogressionHelps mitigate the loss of strength that can occur over time at temperature.
Durability at high temperatureSupports a more durable cement sheath in hotter wells.
Recommendations
Temperature range
120°F and above
Lower temperatures
For 40°F to 120°F, consider RiForce CS-10
Concentration
1% to 5% bwoc; up to 10%+ for high-performance slurries
Compatible with
All oilfield-grade cement systems
Ideal for
Cement slurries requiring higher compressive strengths to meet local regulatory and design requirements
Frequently asked questions
What is RiForce SFA-1?
RiForce SFA-1 is a multipurpose compressive strength enhancing additive for oilfield cements. It increases early and ultimate compressive strength and also improves viscosity and free water control, serving as a cost-effective alternative to silica fume.
What temperature range is RiForce SFA-1 designed for?
RiForce SFA-1 is designed for all oilfield cements in temperatures above 120°F (49°C).
What should I use below 120°F?
For lower temperatures, from 40°F to 120°F (4°C to 49°C), Riteks recommends RiForce CS-10, a more aggressive compressive strength additive.
What concentration of RiForce SFA-1 is recommended?
The typical concentration is 1% to 5% by weight of cement (bwoc). High-performance slurries can use 10% or more.
Which cement systems is RiForce SFA-1 compatible with?
RiForce SFA-1 is compatible with all oilfield-grade cement systems.
Simplify your next high-strength slurry
Get the full technical details or request a sample for lab testing. Our team can help fit RiForce SFA-1 into your slurry design. Call 281.569.3500 or email service@riteks.com.
