Injectivity Impairment due to Sulphate Scaling during PWRI: an Analytical Model

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dc.contributor.authorBedrikovetski, P.
dc.contributor.authorMackay, E.
dc.contributor.authorMonteiro, R.
dc.contributor.authorPatricio, F.
dc.contributor.authorRosario, F.
dc.contributor.conferenceSPE 8th International Symposium on Oilfield Scale (31 May - 1 June 2006 : Aberdeen, Scotland)
dc.date.issued2006
dc.descriptionSPE paper 100512
dc.description.abstractPrevious work has derived an analytical model for simultaneous flow of incompatible waters in porous media with sulphate salt precipitation, determined typical values of kinetics reaction coefficient from corefloods and what the impact would be on productivity impairment during sulphate scaling. This paper extends the previous work, by modelling the injectivity impairment during simultaneous injection of incompatible waters, i.e. cation-rich produced water (PWRI) and seawater with sulphate anions. An analytical model with explicit expressions for deposited concentration and injectivity decline was developed. The location of scale deposition and the resulting injectivity impairment are calculated for a range of sensitivities, including reaction kinetics (ranging from minimum to maximum values as obtained from coreflood and field data), fraction of produced water in the injected mixture and barium concentration in produced/re-injected water. The theoretical parameter of the size of formation-damaged zone was introduced. It was found out that almost all deposition takes place in 2-4 well radii neighbourhood. Calculations show that simultaneous injection of seawater with produced water containing even decimal fractions of ppm of barium would results in significant injectivity decline. Copyright 2006, Society of Petroleum Engineers.
dc.description.statementofresponsibilityBedrikovetski, P.G., Mackay, E., Monteiro, R., Patricio, F., Rosario, F.
dc.description.urihttp://www.proceedings.com/00192.html
dc.identifier.citationProceedings of the SPE 8th International Symposium on Oilfield Scale, 2006, 2006, vol.2006, pp.184-198
dc.identifier.isbn9781604235746
dc.identifier.urihttp://hdl.handle.net/2440/47474
dc.language.isoen
dc.publisherSociety of Petroleum Engineers
dc.relation.ispartofProceedings of the SPE 8th International Symposium on Oilfield Scale, 2006
dc.titleInjectivity Impairment due to Sulphate Scaling during PWRI: an Analytical Model
dc.typeConference paper
pubs.publication-statusPublished

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