ICL Innovation, a technology incubator for the ICL group, seeks novel asphaltene inhibitors and asphaltene dispersants for the oil industry. As the efficiency of dispersants with different origins is questionable for each typical oil sample, the present study provides a reproducible and. Dodecyl resorcinol has the best performance at concentration of 50 ppm as an asphaltene dispersant and causes required n-heptane volume increment of 2%.
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Destabilization of petroleum asphaltenes may cause a multitude of problems in crude oil recovery and production. One major problem is their agglomeration at the water-oil interface of crude oil emulsions.
Once agglomeration occurs, destabilized asphaltenes can form a thick pad in the asphalltene equipment, which significantly reduces the demulsification rate. Certain polymeric dispersants increase dispersatn solubilization in hydrocarbon media, and when used in conjunction with emulsion breakers, facilitate the demulsification process.
Two case studies are presented that demonstrate how asphaltene dispersants can efficiently inhibit pad formation and help reduce demulsifier dosage. Criteria for dispersant application and selection are discussed, which include the application of a novel laboratory technique to assess asphaltene stabilization in the crude oil.
Asphaltene inhibitor – OilfieldWiki
The technique monitors asphaltene agglomeration while undergoing titration with an incompatible solvent precipitant. The method was used to evaluate stabilization of asphaltenes in the crude oil and to screen asphaltene dispersants. Petroleum asphaltenes are defined as a solubility class of the heavy components in crude oil which are insoluble in nonpolar solvents.
Asphaltenes exist in the form of colloidal dispersions stabilized by other constituents of the crude oil. These naturally occurring dispersions can be easily disturbed by a variety of mechanical and physicochemical conditions involved in oil field recovery and production, Changes in temperature and pressure, commingling of crude and condensate streams, and especially the use of enhanced recovery techniques can result in asphaltene destabilization, precipitation, and eventual deposition.
Once deposited, asphaltenes pose a multitude of problems for crude oil producers.
Asphaltene deposition during oil recovery and production can be inhibited or diminished asphxltene the addition of asphaltene dispersants. They have been successfully applied for inhibition and removal of asphaltene deposits in production equipment. For example, continuous or batch downhole treatments prevented deposition in the flowlines and tubing providing increased production rates and decreased downtime for many producers.
Similar effects were observed in squeeze applications of asphaltene dispersants alone or with paraffin inhibitors. The dispersants have also been applied for cleanout of water injection wells resulting in decreased injection pressure and increased oil production.
Cleanup of tank bottoms diepersant an asphaltene dispersant has been a popular alternative to opening the tank in order to mechanically remove thick asphaltene solids for disposal.
Circulating the dispersant in a tank with heated crude has also dispersed the tarry solid into the oil for sale with normal produced crude. Log in to your subscription Username. Peer reviewed only Published between: Advanced search Show search help.
Publishers Content Coverage Privacy. Sheriff’s Encyclopedic Dictionary of Applied Geophysics, fourth edition.