Abstract

HERNANDEZ-PINTO, Valentina; RODRIGUEZ-MUCHATI, Manuel  and  CASTILLO-CAMPOS, Luis. Nueva metodología para la evaluación de productos inhibidores de incrustación basada en modelos existentes. TecnoL. [online]. 2020, vol.23, n.49, pp.140-163. ISSN 0123-7799.  https://doi.org/10.22430/22565337.1648.

Mineral scales are a current phenomenon in the oil industry that may be controlled to avoid expensive operational problems. To minimize these problems, it is necessary the application of chemical treatments known as inhibitors which are evaluated considering few parameters such as calcium hardness or pH. As a consequence, a methodology which jointly takes into account physicochemical properties to evaluate efficiency of calcium carbonate scale inhibitors was developed; two commercial products and one organic antiscalant derived from the cayenne mucilage were used. In the first place, an evaluative methodology schematization to be developed was carried out, based on the union of three phases: assessment using the NACE Standard TM 0374-2007, which takes into account calcium hardness; the Langelier saturation index to determine the water scaling nature and a continuous pH measurement model developed by Zhang, Wu, Li and Zhao. Later, to validate the proposal, three samples of synthetic brines were characterized, and consecutively, considering different dosages (55, 100 and 300 ppm) of the inhibitor products, the established methodology was applied. It was concluded that this new proposal allows evaluating the selected inhibitors performance in each of their stages, to accurately determine their antiscaling capacity in synthetic brines samples at different concentrations, where the mineral scales deposition of calcium carbonate (CaCO3) is expected.

Keywords : Calcium carbonate; calcium hardness; oil industry; pH measurement; synthetic brines.

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