Go Farther.

Introducing Propel SSP proppant transport technology. The same spirit of innovation and determination the Wright Brothers put into their “flying machine” has gone into the all-new self-suspending proppant transport technology from Santrol. So now, a proppant can swell and suspend in water to flow evenly and farther into fractures. We know the idea will fly.

Efficient proppant transport to fractures

Conventional chemical breakers and procedures apply

proppant image close up

Unique hydrogel is strongly attached to the proppant and creates suspension upon contact with water

Propel SSP is a game-changing advancement that allows the proppant to go farther in every fracture. With improved proppant transport, you’ll propel production with more hydrocarbon recovery and achieve better NPV for your well. Learn more below.

Propel SSP relies on a polymer coating applied to a proppant substrate. Upon contact with water, the coating hydrates and swells rapidly to create a hydrogel around the proppant substrate. The hydrogel layer, which is primarily water, is attached to the proppant particle and provides a nearly threefold increase in the hydrostatic radius of the proppant. This reduces the effective specific gravity to about 1.3, compared to 2.6 for a typical uncoated sand grain. Lab testing shows that original proppant substrate crush strength and conductivity are not affected by the coating process, transport through fractures, and chemical breakers. The technology is stable from 35°F (2°C) up to 380°F (193°C).

With Propel SSP, the improvement in transport behavior is remarkable. It’s far easier to keep proppant moving efficiently along laterals all the way to the farthest stages and higher into fracture tips. Total propped surface area will increase to improve well yield.

Testing at Stim-Lab revealed that this technology delivers viscous transport properties from a thin fluid. Typical supernate viscosities at 1-3 PPG loading are 5 to 35 cPs, compared to as much as 1,000 cPs for conventional, cross-linked gel systems at 250-300°F (121-149°C).

This technology will help save significant amounts of water and time in slickwater completions. Many operators rely on multiple water sweeps to complete movement of conventional proppants into fractures, often with uncertain results. The superior suspension and transport behavior of Propel SSP eliminates the need for fluid sweeps. This saves both water and pumping energy.

Proppants using this technology will help you recover more from your well. Because it efficiently transports more proppant along laterals and into fracture tips, Propel SSP helps the proppant reach more hydrocarbon.

Additionally, the hydrogel layer has excellent friction-reducing properties and remains attached to proppant particles to help them slip through tight, tortuous fracture passages. Greatest benefits will be observed in slickwater and hybrid frac designs.

Propel SSP will reduce or eliminate the need for viscosifiers, crosslinking agents, and friction reducers. This simplifies topside operations and lowers the cost of overall completion chemistry. Proppants based on this technology are designed for use in most water, but are compatible with typical linear gels should alternative fluid designs be desired.

While conventional sand is difficult or impossible to restart after a pumping shutdown, proppants with Propel SSP are readily resuspendable – even multiple times. Only modest pumping energy is required for a restart, also reducing the need for fluid sweeps.

For breaking the hydrogel layer, conventional breaker chemicals such as ammonium persulfate and magnesium peroxide can be used in the frac fluid composition. There is no new equipment or chemistry to master. However, breakers based on perborate and perchloric chemistries are not recommended.