CASE STUDIES
Heavy Oil Desludging Agent (HOSS5) Case Study
Verdechem Technologies has built a specialized solvent/surfactant blend to solvate and disperse heavy oil sludge.
Product Description
HOSS5 is a specialized solvent surfactant blend, designed to solvate and disperse heavy oil sludge; effective in penetrating heavy asphaltenic oil and polymer based heavy oil sludge. This unique combination of solvents and surfactancy allow the chemistry to penetrate and solvate sludge which is often untouched by conventional xylene treatments or routine hot water flushes.
Field Application
The HOSS5 chemistry can be applied as a batch treatment down the tubing or annulus, to solvate and mobilize sludged heavy oil from plugged perforations in either oil or injection wells. It can also be used in batch treatments of pipeline or process facilities which experience heavy oil sludge flow assurance issues.
Key Performance Indicator
The graph below illustrates how the HOSS5 stimulation chemistry has outperformed hot water flushes and other conventional stimulation techniques. This remediation significantly increased sustainable incremental water injection – approximately +350% m3/day over a 3-month period!
Bakken Injection Well
VerdeChem Stimulation - June 2022
SCi7775
Iron Control Scale Inhibitor + Water-Flood Conditioner
SCi7775 is a powerful anti-foulant chemistry which uses a blend of high-performance additives to achieve scale control in oilfield systems. It also acts as a high activity chelant, which effectively inhibits iron cations in the presence of Calcium and high TDS brines.
SCi7775 is capable of both retarding the formation of Iron Sulfides and removing Iron Sulfide deposits over time. It has water wetting capacities for removing oil filming and keeping scaling cations soluble in mixed pH regimes.
To treat problems associate with Montney wet gas production, the SCi7775 excels due to its solvency, surfactancy, and demulsification properties.
De450w
Anti-Foulant + Demulsifier/Desludging Agent
De450w breaks flow back foulant laden emulsions and acid oil emulsions. It is water soluble, but its components can partition into the oil phase to effectively break out foulants, solids and asphaltenes which tend to stabilize emulsions.
DE450w effectively reduces the interfacial tension and changes the wetting of solids to break emulsions and cause foulants to drop into the interface and the brine.
CD235i Case Study
Verdechem Technologies has built a very effective solvent/dispersant for the Kakwa/Montney formation.
History
An E&P company has been experiencing major internal fouling and plugging from newly fracked wells. Internal issues caused floats and valves to stick open flooding condensate to water tanks and carrying over water to condensate sales bullets. This resulted in huge trucking costs, down time, and lost production. The E&P company had several solvent programs currently running but the products were ineffective.
Field Testing
Samples of the paraffin were collected from the
field and testing was completed. VerdeChem Technologies developed a surfactant-based solvent with crystal modifiers that demonstrated a significant improvement in overall performance compared to previous chemistries used.
The following pictures show the main difference in solvency vs. inhibition. Please note that inhibition is not an application of the CD235i itself.
In the pictures to the right, you can quickly see the importance of proper solvency selection in developing a product that will quickly solvate or disperse the paraffin from reforming.
Recommendations
VerdeChem recommended that we set up mobile units on the newly fracked well pads to inject CD235i into the flow line to the effected Pad Separator to alleviate the problem.
Conclusion
Within a couple of hours, the Pad that was experiencing these problems was quickly cleaned up and running normally. This is now a regular program with newly fracked wells.
MS306Bpp
INHIBITION CASE STUDY
MS306Bpp is a solvent-based, oil soluble chemical formulation for use in crude oil and condensate to control paraffin deposition. It is also a wax crystal modifier/pour point depressant that inhibits the gelation of the oil. The MS306Bpp is winterized and optimized for continuous injection in process facilities and downhole applications.
There was a flow assurance issue where condensate stabilizers were swinging – the stabilizer was reading high levels due to foulant buildup on the stage valves. VerdeChem field trialed the MS306Bpp to solve the problem. Chemical injection was started at the feed drum that carries over into the reboiler and stabilizer tower.
Below is a before and after comparison of the Stage Valves pre and post injection:
