nanoActiv® HRT in an Energized Huff ‘n Puff

reCharge HnP is a multi-spectrum treatment for vertical and horizontal wells suffering from declined production with restrictions to fluid flowing into the wellbore. The treatment enables the recovery of hydrocarbons to be accomplished faster, more completely, and with longer efficacy than existing options on the market today.


A Productive Partnership

Linde and Nissan Chemical have joined efforts to enhance downhole performance by combining nanoActiv® HRT (Hydrocarbon Recovery Technology) with a carbon dioxide (CO2) or nitrogen (N2) application method.

Nissan Chemical’s excellence in nanotechnology and Linde’s global reach and expertise in job design and technical services in oil and gas well remediation and restimulation, combine to provide maximum techno-economic production results in today’s market.

A Powerful Combination

Combining properties of gas and nanoparticles creates a unique, synergistic treatment that addresses several potential production issues simultaneously.

The gas helps remove debris, fines and other matter and stimulates the well with pressure, while driving the effective distribution of the nanoActiv® HRT particles to deeper parts of the formation. In cases where the gas is miscible, it also contributes to mobilizing crude oil due to swelling and viscosity reduction.

nanoActiv® HRT’s nano-sized particles penetrate further and more thoroughly permeate the natural fracture network than traditional remediation or restimulation technologies. These particles produce a Brownian-motion, diffusion-driven mechanism, known as disjoining pressure, resulting in longer and more complete production efficacy. Field application data validates that particles pushed with Linde’s gas produce significant and sustained improved hydrocarbon recovery.


Our solution is a prescribed, well remediation treatment (Huff ’n Puff) consisting of three phases: injection, soaking and production. Because of the synergies between the nanoActiv® HRT and gas, the soak times can be dramatically reduced from traditional HnP treatments. Depending on the type of formation, well history and identified issues, a specific treatment plan is prescribed.

Linde nanoActiv® by Nissan Chemical America

nanoActiv® HRT is made in the USA · Patent Pending


reCharge HnP · Oil Production

Austin Chalk Formation, Frio County, Welss A & B

June–December 2017 data from two Austin Chalk and two Buda wells in Frio County, Texas. These wells were remediated using a reCharge HnP treatment where nanoActiv® HRT was injected into the reservoir and pushed further out by N2 to allow even deeper penetration.

Austin Chalk Formation · Well A (blue line)

reCharge HnP pre- and post-treatment comparison after 180 days of cumulative production. Cumulative oil production increased 12%.

Austin Chalk Formation · Well B (red line)

reCharge HnP pre- and post-treatment comparison after 180 days of cumulative production. Cumulative oil production increased 174%.


reCharge HnP · Gas Production

Buda Formation, Frio County, Wells A & B

Buda Formation · Well A (high dosage)

reCharge HnP pre- and post-treatment comparison after 180 days of cumulative production. Cumulative gas production increased 564%.

Buda Formation · Well B (low dosage)

reCharge HnP pre- and post-treatment comparison after 180 days of cumulative production. Cumulative gas production increased 30%.

Numerous factors affect the performance of an oil well—the geology, the number and size of treatment stages, the choice of additives, etc. reCharge HnP treated wells have shown meaningful performance improvement versus comparative wells from the same operators. While no single technology or treatment can account for the entire performance of an oil well, the effects of reCharge HnP are significant and compelling.


reCharge HnP · Well Treatment Screening

For a successful treatment, appropriate screening of candidate wells is the first step. Linde and Nissan will work with operators on candidate identification before prescribing a recommended treatment plan.

Production Good initial production (IP) with decline curve that indicates wettability issues. Current production <20% of IP and >5-10 BOPD or 20 mscf
Field Data Overall well performance should be on par with other wells in the field.
Treatments Acid and other chemical treatments may negatively impact properties of nanoActiv® HRT.
Well Equipment To be in good mechanical condition. Pumps, linings, gaskets.
Water Too high content of salts (e.g., KCl) and TDS may negatively impact nanoActiv® HRT.
Water Cut <80% (N2), <90% (CO2)
Net Pay Zone <100 ft (30 m) to optimize for 60-90 days payback.
Porosity Conventional >8%; Unconventional >4%
Oil Oil gravity <30 API it’s recommended to use CO₂. Asphaltene precipitation may be caused by gas injection.

In collaboration with:

The Linde Group

Getting ahead through innovation.

Linde, a global leader in industrial gases and engineering, offers more than 50 years of experience in the energy industry and is the biggest CO₂ supplier for the industry in North America. Expertise spans CO2 and N2 treatments for fracturing, enhanced oil recovery and single-well stimulation (HnP).

With its innovative concepts, Linde is playing a pioneering role in the global market. As a technology leader, it is our task to constantly raise the bar. Traditionally driven by entrepreneurship, we are working steadily on new high-quality products and innovative processes. Each concept is tailored specifically to meet our customers’ requirements—offering standardized as well as customized solutions.

Linde—ideas become solutions.

reCharge HnP
Learn more here.