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nanoActiv Products and Applications

nanoActiv® HRT
Steep production decline curves mean there is intense pressure to keep replacing the production lost year after year. Operators are looking for ways to get more oil out of existing wells without expensive refracturing or other intervention technologies.


nanoActiv® HRT utilizes nano-sized particles in a colloidal dispersion. These particles behave as a wedge film driven by Brownian motion and diffusion defined as disjoining pressure—greatly facilitating and accelerating the mobility of gas, oil, and water, or mixtures thereof. nanoActiv® HRT penetrates the fracture network on a nanoscopic scale with particles so small they reach hydrocarbons deep in the natural fracture network, providing increased access to the reservoir.

 

nanoActiv® HRT is designed to be used in clean fluids and as the only additive in a selected volume of treatment. Its recommended use is as a small pre-pad pill and/or intermittent slug pumped ahead of or within each stage of a fracturing / stimulation treatment, or as a stand-alone volume committed to a particular wellbore or surface facility remediation application. nanoActiv® HRT can be made available in neutral, low, or high pH fluid compatible formulations. High temperature formulations enable application in environments up to 350⁰ F.

The following plot shows a case study of new well completions for 78 wells in the Wolfcamp formation, in the Midland and Delaware Basin. The production data*** shows the difference in the cumulative BOE over a 6 month period for wells treated** with nanoActiv® HRT vs. those left untreated*. A 21% increase in the cumulative BOE is seen at the 6 month mark for the nanoActiv® HRT treated wells, equating to approximately 16,000 bbls of incremental oil produced per well.

*The blue line shows the average cumulative BOE of 65 wells that were not treated with nanoActiv® HRT
**The red line shows the average cumulative BOE of 13 wells that were treated with nanoActiv® HRT
***Data was limited to direct offsets with reasonable data quality as reported to the Texas RRC

 

nanoActiv® EFT

Hydraulic fracturing can introduce a variety of fracturing fluid systems into unconventional reservoirs. When a lower salinity fracturing fluid comes into contact with a higher salinity low permeability formation, fracturing fluid filtrate can get trapped into the pore spaces due to a difference in osmotic potential. This can lead to an increase in the water saturation and a problematic decrease in hydrocarbon mobility in pore spaces.

nanoActiv® EFT increases profits through greater initial oil and gas production. It is a nanoparticle micellar dispersion, which uses a synergistic combination of silicon dioxide nanoparticles, a soybean extract solvent, and a blend of surfactants. nanoActiv® EFT exhibits an extremely effective primary chemical action, enhanced with the added mechanical properties of nanotechnology. nanoActiv® EFT delivers the unique advantages of diffusion, disjoining pressure, fragmentation, and reduction in interfacial tension. It improves stimulation fluid interaction near the created and propped fracture faces—increasing initial oil and gas production.

 
The surfactant in nanoActiv® EFT reduces the interfacial tension of fracturing fluids and mobilizes immobile water-block zones in pore spaces.

 
The soybean-extract solvent improves the mobility ratio by reducing oil viscosity through solvent miscibility with the oil.


The nanoActiv® nanoparticles not only extend the life of the micellar dispersion, but also employ a Brownian-motion, diffusion driven mechanism known as disjoining pressure to free oil from small pore spaces, fragmenting it into smaller droplets for increased production.

nanoActiv® EFT is designed to be pumped in the body of the fracturing fluid as an additive at concentrations between 2 gallons and 10 gallons per 1,000 gallons of fracturing fluid. This allows nanoActiv® EFT to aid in a more efficient and complete flowback of the fracturing fluid—radically increasing the percentage flowback over a shorter time period.

nanoActiv® HRT and nanoActiv® EFT combined

Initial field results have indicated the synergistic effect of using both nanoActiv® HRT and nanoActiv® EFT in combination in various applications, e.g. in a fracture stimulation treatment, or a remedial application.

nanoActiv® HRT is pumped as a concentrated slug either as a pre-pad pill or within the early parts of the fracture stage. The nanoparticles in nanoActiv® HRT work to mechanically disjoin hydrocarbons off of rock surfaces. nanoActiv® EFT is pumped diluted throughout the body of the frac where it works chemically to reduce interfacial tension, among other mechanisms, to increase the overall efficiency of the treatment. nanoActiv® EFT ensures improved initial oil and gas production, which is sustained for longer periods of time by nanoActiv® HRT.

 
reCharge HnP™
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.

Nissan Chemical has joined efforts with leading gas suppliers to enhance downhole performance by combining nanoActiv® HRT or nanoActiv® EFT with a carbon dioxide (CO2) or nitrogen (N2) application method.

Nissan Chemical’s excellence in nanotechnology and their partners’ 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.

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 or nanoActiv® EFT 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 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 nanoActiv® HRT or nanoActiv® EFT 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.
 


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%.


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%.
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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.

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