This paper provides an insight of a unique scaling problem arising from high-temperature (>200 deg C) steam-flooding of an Eocene carbonate oil reservoir, supported with some interesting observations.  It outlines the challenges in developing and implementing an effective scale treatment and, in particular, providing reliable downhole capillary chemical injection.  It then describes both the methodology used to select and qualify chemicals inhibitors and the results obtained therein.  Next, the paper presents initial results of a field trial of a chemical inhibitor that was identified and qualified from laboratory experimentation.  Furthermore, an ongoing research effort to further improve the scale inhibition via squeeze treatment is also briefly mentioned.This paper should provide readers reference values pertaining to the occurrence of this unique scaling problem and finding solutions for this and similar scaling challenges associated with enhanced oil recovery from an Eocene carbonate reservoir using steamflood methods.

Control of calcium sulfate scale deposition in high temperature, steam-flooded oil wells in an Ecocene carbonate reservoir

244th National Meeting (2012)

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