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Development of a Combination Scale- and Corrosion Inhibitor for High TDS Brines at High Temperature

Picture for Development of a Combination Scale- and Corrosion Inhibitor for High TDS Brines at High Temperature
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Accounting for 1.2 million bbls/day the Bakken shale plays a significant part in the North American unconventional boom. The formation is characterized with low porosity and permeability where wells exhibit high initial production rates and steep decline curves. Mitigating excessive decline is paramount to maintain return on investments.The system conditions and the produced water in the Bakken shale causes challenges that can impact productivity. The water composition is generally characterized with high total dissolved solids (TDS) resulting in high scaling tendencies for various species. In addition corrosion is also a challenge due to high TDS high downhole temperature (~250 °F) medium CO2 partial pressure (40-50 psi) and varying shear.A chemical qualification process is herein discussed where a combination corrosion- and scale inhibitor has been developed. The chemical is a synergistic blend of corrosion inhibitor actives and surfactants for corrosion mitigation and solids control combined with scale inhibitor and chelating agent for high iron tolerance scale control. The product had to be tailored to a chemical injection system that involves concurrent injection of several other production chemicals into a fresh water line that is subsequently injected downhole at elevated temperatures in a high TDS brine.Key words: Scale inhibitor corrosion inhibitor high TDS compatibility combination production chemical Bakken

Product Number: 51319-13497-SG
Author: Ole Gilje Avaldsnes
Publication Date: 2019
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$20.00
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Picture for Development of New High Temperature Scale and Corrosion Inhibitor Combination Product for Capillary Injection
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Development of New High Temperature Scale and Corrosion Inhibitor Combination Product for Capillary Injection

Product Number: 51319-13190-SG
Author: Carlos Menendez
Publication Date: 2019
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The development of combination products for scale and corrosion inhibition for fields producing at high downhole temperatures (~150C) and that generate produced waters with high Calcium concentrations can be a challenging undertaking. Traditional phosphonate scale inhibitors can be very effective; however they have been shown to form insoluble inorganic scales at high calcium concentrations that can plug and fail capillary strings. The development in this work considered the use of polymeric type scale inhibitor and a newly recently introduced high temperature corrosion inhibitor. Again because this is a high temperature application the evaluation of the corrosion performance can also be challenging due to the difficulties derived from attempting to prevent the scaling process while trying to obtain meaningful corrosion performance data. The developed combination product was stable at 150C compatible with capillary string materials and outperformed an incumbent product based on a phosphonate scale inhibitor and a more traditional type of corrosion inhibitor.
Picture for 09278 Scale Inhibitor Selection for Deepwater High Temperature Applications
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09278 Scale Inhibitor Selection for Deepwater High Temperature Applications

Product Number: 51300-09278-SG
ISBN: 09278 2009 CP
Author: Suyun Wang and Jonathan Wylde
Publication Date: 2009
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Picture for Evaluating the impact of different families of scale inhibitors on corrosion inhibitor performance
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51318-11505-Evaluating the impact of different families of scale inhibitors on corrosion inhibitor performance

Product Number: 51318-11505-SG
Author: Ana Ferrer / Yolanda De-Abreu / Carol Roach
Publication Date: 2018
$20.00

How different families of scale inhibitors impact corrosion inhibitors performance in the presence of each other. Fundamental properties of both chemistries and how their interaction can be understood at the molecular level.
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