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Keywords: inhibitor
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Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200710-MS
... and not simply delayed. A product and dose rate is considered effective if the increase in differential pressure during the test period is less than 1 psi from the baseline (obtained during the blank run). To evaluate the scale inhibitor with its MIC, scale inhibitor is injected with the brines...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200704-MS
... that a kinetically stable region exists where no scale will form even when the solution is supersaturated. The purpose of this study is to identify the existence of such a supersaturated region where scale does not form and to determine whether inhibitor is needed to control scale at this range of supersaturation...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200655-MS
...) deposition to also occur in these environments as well. The elevated iron content present in these brines not only introduces the potential for deposition of iron-related scales but is also known to have a negative impact on scale inhibitor performance against calcium carbonate and barium sulfate scales...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200669-MS
... temperature potentially up to 450°C ( Wylde, et al., 2011b ). Abstract An oilfield operator relies extensively on heat exchangers (Hexs) to break heavy oil emulsions. A workhorse inhibitor worked reliably to control thermally induced scale precipitation caused by local hard waters. However, an upsurge...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200662-MS
.... Figure 1 Improved kinetic turbidity test method with laser apparatus for barite nucleation and inhibition study Barite nucleation and inhibition experiments were conducted by mixing cationic and anionic solutions with inhibitors. Therefore, the cationic stock solution containing BaCl 2...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200706-MS
.... The dispersant efficiency depends on the scale particle size, and larger particle sizes usually require higher dispersant dosages. Other factors that may influence the inhibitor dosage include reactant concentrations (cations and anions), pH, salinity and inhibition time. These factors were investigated using...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200670-MS
... ). Therefore, small changes in ion concentrations, temperature, and pressure have significant impacts on the saturation level of solution so that barite can be readily precipitated in production wells. There are several effective threshold inhibitors containing anionic groups of phosphonates, carboxylates...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200685-MS
... Abstract Diethylenetriamine penta(methylenephosphonicacid) (DTPMP) is a commonly used phosphonate scale inhibitor for CaCO 3 and BaSO 4. Even though DTPMP can be squeezed into the reservoir, the duration of the flow back could be improved. Therefore, frequent injection is needed to maintain...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200705-MS
... ) is the Ba 2+ concentration in sample with inhibitor at time t in ppm, c b ( t ) is the Ba 2+ concentration in sample without inhibitor at time t in ppm. The MIC of bottle test is defined as the minimum inhibitor concentration that has 90% of IE after 24 hours. The tube-blocking setup is shown...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200701-MS
... Figure 5 A schematic of the mechanism of scale inhibitor retention adsorption to precipitation for common scale inhibitors Abstract The control of inorganic scale deposition within production wells by deployment of scale squeeze treatments is a well-established method for both...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200671-MS
... The laser-light based mKTT apparatus [ Figure 1 ] is designed in Brine Chemistry Consortium, Rice University. The apparatus and method is optimized to evaluate the inhibitors for calcium sulfate scale inhibition. The test apparatus is designed to run for up to four samples simultaneously...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200692-MS
... when performing waterfloods, especially with the injection of sulphate rich seawater into the often barium rich formation water present in the reservoir ( Jordan et al., 2008 ). To combat this issue, a scale inhibitor may be applied to the production well as a "squeeze" treatment where the inhibitor...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200709-MS
... The scale inhibitor FeS efficacy laboratory tests used in this paper are either standard or slightly modified accepted industry test procedures. A series of lower molecular weight copolymers were prepared containing different Type B amine functionalised monomers. The new polymers were...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200693-MS
... Barite deposition is a common oilfield scale observed during production. ZnS is a more exotic, less common scale. ZnS deposition has been reported in a number of fields 1-7 . Many studies have been conducted on barite inhibitor and ZnS inhibitor chemistries 7-12 . Certain phosphonate inhibitors...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200682-MS
... excitation, compared to most standard fluorescent molecules that emit within a few nanoseconds of being excited. Two approaches were considered for the ability of on site detection of polymeric scale inhibitors at low MIC (1-2ppm), namely, the development of F tagged sulphonated polymeric scale...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200694-MS
... Industry standard performance testing of scale inhibitors includes the static bottle and dynamic scale loop tests. These methods are well documented in literature ( Graham et al., 2002 and references therein; NACE TM0197-2010), as well as their modification to test under anaerobic conditions so...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 24–25, 2020
Paper Number: SPE-200703-MS
... the well during the entire treatment lifetime. Ion concentrations and residual inhibitor concentrations were monitored together with production parameters to assess the scale situation in the well. Following the treatments, the well showed an increased gas production. The well produced 1.2MSm 3 at 40...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190698-MS
... Phosphonates and phosphate esters are not often considered for treating co-mingled wells in the same flow line because of the difficulty to differentiate between the different phosphorus based products. Phosphorus-based scale inhibitors such as penta-phosphonates (DETPMP), P-Esters and phosphorus...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190733-MS
... - were used to preliminary screen out and define conditions. The novel chemistry, when compared to industry benchmark inhibitors from low (55°C) to ultra high temperature (250°C), showed an extremely positive overall performance gap. The product thermal resistance evaluation and its impact on chemical...
Proceedings Papers

Paper presented at the SPE International Oilfield Scale Conference and Exhibition, June 20–21, 2018
Paper Number: SPE-190700-MS
.... Consequently, calcium carbonate deposition has been widely studied under a variety of environmental conditions and in the presence of various inhibitors in an effort to control or fully prevent scale formation (e.g., Matty and Tomson 1988 ; Koustsoukos et al., 1990; Oddo and Tomson, 1990 ; Oddo and Tomson...

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