Two-Stage Model Reveals Barite Crystallization Kinetics from Solution Turbidity

Dai, Zhaoyi; Zhang, Fangfu; Kan, Amy T.; Ruan, Gedeng; Yan, Fei; Bhandari, Narayan; Zhang, Zhang; Liu, Ya; Lu, Alex Yi-Tsung; Deng, Guannan; Tomson, Mason B.

doi:10.1021/acs.iecr.9b01707

Cited by 21 publications

(42 citation statements)

References 92 publications

(161 reference statements)

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“…The calculations use the speciation model of Tomson et al (1994) for different inhibitors. Also included in SqueezeSoftPitzer is the minimum inhibitor concentration (MIC) predicted from our inhibitor model (He et al 1996(He et al , 1999Dai et al 2019). The following three sets of algorithms were included in SqueezeSoftPitzer, where the thermodynamic equilibrium constants and Pitzer equations are used to model the connate water chemistry.…”

Section: Squeeze Modelingmentioning

confidence: 99%

The state of the art in scale inhibitor squeeze treatment

2020

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The mechanistic understanding of the reactions that govern the inhibitor retention and release, modeling, and the state-ofthe-art innovation in squeeze treatment are reviewed. The retention and release are governed by (1) the amount of calcite that can dissolve prior to inhibitor-induced surface poisoning; (2) calcite surface poisoning after ~ 20 molecular layers of surface coverage by the adsorbed inhibitors to retard further calcite dissolution; (3) less base, CO 2− 3 , is released into the aqueous solution; (4) formation of the more acidic inhibitor precipitates; (5) phase transformation and maturation of the more acidic inhibitor precipitates; and (6) dissolution of the less soluble crystalline inhibitor precipitates. The trend to advance squeeze technologies is through (1) enhancing scale inhibitor retention, (2) optimizing the delivery of scale inhibitors to the target zone, and (3) improving monitoring methods. Lastly, a prototype yardstick for measuring the squeeze performance is used to compare the squeeze life of 17 actual squeeze treatments. Even though the various squeeze treatments appear to be different, all published squeeze durations can be rated based on the normalized squeeze life per unit mass of inhibitors.

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Section: Squeeze Modelingmentioning

confidence: 99%

The state of the art in scale inhibitor squeeze treatment

2020

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“…Mineral Scale Threats in Oil/Gas Industry The formation of scale particles is a result of exceeding local saturation of the brine solution at the operational conditions of concern (Jordan et al, 2008a;Kan and Tomson, 2012;Zhang P. et al, 2015;Dai et al, 2019;Kan et al, 2019;Ness and Sorbie, 2019;Zhang et al, 2019b). The solution supersaturation will initiate scale crystal formation and subsequently promote the crystal growth of scale particles.…”

Section: Oilfield Flow Assurance and Mineral Scalementioning

confidence: 99%

Review of Synthesis and Evaluation of Inhibitor Nanomaterials for Oilfield Mineral Scale Control

Zhang

2020

Front. Chem.

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Oilfield flow assurance is the subject to study the impact on the flow of production fluids due to physicochemical changes in the production system. Mineral scale deposition is among the top 3 water-related flow assurance challenges in petroleum industry, particularly for offshore and shale operations. Scale deposition can lead to serious operational risks and significant financial loss. The most commonly adopted strategy in oilfield scale control is the deployment of chemical inhibitors. Although conventional chemical inhibitors are effective in inhibiting scale threat, they have the drawbacks of short transport distance and limited squeeze lifetime due to their intrinsic chemical properties. In the past decade, as an alternative to conventional chemical inhibition, research efforts have been made to prepare functional nanomaterials with different chemical compositions to overcome the drawbacks of conventional chemical inhibitors. These synthesized nanomaterials can serve as delivery vehicles to deploy inhibitors into the target location in the production system. These nanomaterials are reported to have multiple advantages over the conventional inhibitors in terms of transportability, controlled release, and functionality, evidenced by a series of experimental studies. This review presents an overview of scale inhibitor nanomaterial development and the current methods to synthesize and to evaluate these nanomaterials in a systematic and comprehensive manner. This review focuses on the chemistry principles and methodologies underlying inhibitor nanomaterial synthesis and also the chemical instrument and strategies in evaluating the physiochemical properties of these materials in terms of inhibition effectiveness, transportability, and inhibitor return. The scale inhibitor nanomaterials (SINMs) presented in this review exemplify the continuous development in our capabilities in adopting novel nanotechnology in combating actual engineering challenges in petroleum industry.

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“…In the case of barium sulfate crystallization, the 'two step mechanism' is hypothesised to occur. [14][15][16][17] This states that initially, a highly disordered solid is formed and over time this becomes the crystalline particle via some mechanism, as predicted by Ostwald's rule of stages. Thus, the name 'two step' is used because crystallization occurs via two distinct stepsformation of the disordered solid and then transformation to the crystalline solid.…”

Section: Introductionmentioning

confidence: 96%