A Novel Scale Inhibitor Chemistry for Downhole Squeeze Application in High Water Producing North Sea Wells

Abstract

opyrighi 1995, socIcty of Petrolem, Engumms. Inc. 'hIS paper WIIS prepared fcr r senlauon at k Offshore European Conference held m AberdeeIL 5-S .Sqxembcr 19 5. This per was selected for Ptesentmon by m SPE Program Comnuttec following rewew of i$%mmwm contained in m AM..., by the mib.n'fs). bmems of this paper. as pre~med. bavc no{ ban reviewed by the Somty of Petroleum EngInccm and are subfect to correct-n by tbe author(s). The matend, as psenled, das not mcusarily reflect any position of tfx Society of Petroleum Engmesra, its officers, or members. Pafms presented at SfW meetmgs am aubfect 10 publication Kvtew by Editoriai Committee of tbc Society of Petroleum Engincms. Pcnnisaion IO copy is restricted 10 an abstract of not motw than 300 wonh. Illustrations IMY not k cooicd. The abstract shoufd contain unapicuous acknowledgement of whc& or by wlhn UK %x 1632.45 SPEUT. rpr '" scntcd. Write Librarian, SPE, P.O. ha 833S36, lhchardson, TX 750S3-3S 6, U.S.A.

Asymmetrical Dependence of {Ba2+}:{SO42–} on BaSO4Crystal Nucleation and Growth in Aqueous Solutions: A Dynamic Light Scattering Study

“…For example, some antiscalent chemicals cause barite crystals with a well-faceted {001} surface to be replaced by barite crystals in which growth rates in all directions will be inhibited, leading to a loss of anisotropic growth as well as a smaller particle size . Common chemicals that have been used as additives for the inhibition of barite are phosphonates and compounds with polyphosphino-carboxylic functional groups − as they are stable over a wide range of temperatures and pH, inhibit scale at low concentrations, target many types of scale, and their concentration is easily determined by colorimetric techniques . However, most studies investigated the bulk phase, such as in situ jar tests, and research focusing on the surface chemistry in industrial settings has only taken place recently. − The main goal of those studies was to relate surface chemistry processes to the interaction behavior of barite crystals with distribution piping material and drilling fluids under specified physicochemical conditions.…”