Stim clean
Stimulation of Oil and Gas Producing Locations
What is it?
STIM CLEAN is a water-soluble low PH surfactant. It is composed of sulphamidic acid, hydrogen chloride and surfactant. It is typically applied via batch application to dissolve solids or to stimulate oil and gas producing locations.
Lower toxicity than Hydrochloric Acid.
Dissolves a wider range of solids and disperse particles thanks to a surfactant being present in the chemical makeup.
Safe to use on a wide range of surfaces including steel, poly, and fiberglass.
applications
STIM CLEAN is typically applied via batch treatment to be pumped down hole, pre or post-production failure to either stimulate or remove solids deposition down hole. This can be applied by itself or with solvents and additional acid. Solids analysis and other analytical data should be used for treatment designs.
Case Studies
Work Over Treatment
An oil and gas producer north of Williston, North Dakota encountered instant pressure when attempting to flush a rod string so it could be pulled. A hot oil truck pushed hot fresh water down hole and hit pressure instantly. Solids from this location were previously identified as FeS (Iron Sulfide). A treatment using 330 gallons of STIM CLEAN and a solvent to clear off hydrocarbon coatings was conducted. The well pressure dropped within 10 minutes and the rods were successfully pulled with no solids found on the string.
Post Failure Treatment
An oil and gas producer in North Dakota started to see a production decline leading to the anticipation for a failure. Historical and analytical data showed this location to be at risk for scale precipitation. A small batch treatment including 55 gallons of STIM CLEAN was conducted. Production came back up and the well ran for another 8 months with no issues.
Testing
Solids Mitigation Testing
STIM CLEAN and SF-4006 were compared regarding there ability to dissolve solids. Bottles of FeS were dosed with 50% diluted product and fresh water to simulate a large batch treatment. STIM CLEAN shows to be the superior product as it has less precipitated solids and keeps the left-over solids from re coalescing. This will remove hydrocarbon coatings and dissolve solids. STIM CLEAN has continued to outperform other surfactants and has shown to be a versatile product.
SF-4006 Underperforms with solids still stuck to the container surface. Stim Clean has a clean surface with solids being kept in solution.
Bottle Testing
Bottles of collected water were dosed at 40 ppm with two low PH surfactants. STIM CLEAN and SF-4006. Both are proven products that are water-soluble and safe to use on metal surfaces. Testing shows the STIM CLEAN clears up the water with little precipitation of solids seen. SF-4006 leaves a pad of solids on the surface and the blank shows solids precipitating at the bottom. Though both products are successful, STIM CLEAN shows to outperform SF-4006 by keeping any leftover solids from staying suspended.
Initial
1 hour
2 hours
combining with si-0373
Recent experiments have shown a pairing of two products to be successful in locations with solids issues. This pairing will work against Iron and non-Iron based scales. This will also keep furtherer deposition from forming and protect against corrosion. STIM CLEAN and product SI-0373 have been combined in a 25/75 mix. SI-0373 is a phosphonate-based scale inhibitor. This newly built product will allow for continuously treating with STIM CLEAN. This pairing has begun to show success at various oil and gas wells in the Bakken.
summary
Low PH surfactants are effective in treating solids once they have formed in a system. The low PH of the surfactant will dissolve the solids into smaller pieces and the surfactant will prevent the pieces from recoalescing back in to larger chunks. Adding this chemistry to any treatment can be successful especially when dealing with iron compounds. Solids such as this can become oil-coated sticking pumps, clogging lines, and causing phase separation issues.