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Keywords: precipitation
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Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213876-MS
... Several authors have concluded that salt precipitation is mainly a near-wellbore phenomenon and occurs as reservoir pressure declines ( Dietzel et al., 1998 ; Grattoni et al., 2009 ; Kleinitz et al., 2003 ; Mackay et al., 2022 ; van Dorp et al., 2009 ). As expected, when recovery progresses...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213864-MS
... and gas flow rates. Salt precipitation in producing wells increases operating costs and generates production losses. Scale deposition occurs by known mechanisms in sandstone and carbonate reservoirs; nevertheless, most scale management knowledge has been built up based on sandstone reservoirs...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213811-MS
... ABSTRACT The utilization of predictive mechanisms to resolve asphaltene precipitation during oil production is a cleaner and less expensive means than the mechanical/chemical remediation techniques currently employed. Existing models lack predictive success due to opposing views on temperature...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213849-MS
..., the temperature decreases were so abrupt, or the experiments are limited to lower temperatures. As a result, inaccurate results and unrepresentative field conditions are produced. Our new precisely temperature-controlled method simulates halite precipitation at high temperatures up to 120+ °C with real-time...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213852-MS
... experiment reservoir shale fracture biofilm hydraulically fractured reservoir international mineral shale gas mudstone contamination microbial contamination image complex reservoir rock type petroleum play type shale geobiocell permeability diminishing productivity caused precipitation...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213883-MS
... remediation loading reduce fresh water usage wax remediation inhibitor loading ssw gel stabilizer precipitation breaker stability precipitate Introduction In offshore fracturing or frac packing operations, fresh water is largely used to prepare the fracturing fluid. As the operations...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213854-MS
... of the acid system was first measured. Then the potential risk of unwanted precipitation of the reaction products was investigated. Finally, the performances of the SMCA system at various formulations were investigated by performing coreflood experiments at high temperatures. The coreflood experiments were...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213819-MS
... and magnesium ions. The resulting model couples together the equations of (i) the carbonate system, (ii) the speciation of the SI, modelled as a weak polyacid, H n A, (iii) the metal (Ca 2+ , Mg 2+ ) binding – SI chelant interactions and (iv) the subsequent precipitation of SI-Ca-Mg complex. These reactions...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, December 6–7, 2021
Paper Number: SPE-204315-MS
... conditions traditionally implied precipitation and deposition of asphaltenes only. Most of the previous studies on organic deposition have been conducted with the key assumption that aggregation and precipitation of wax and asphaltene occur independently. A few researchers investigated the solubility...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, December 6–7, 2021
Paper Number: SPE-204322-MS
... Abstract Aminopolycarboxylate-based chelants are used to control iron precipitation during acidizing operations by interacting directly with the iron, resulting in water-soluble complexes. This paper highlights that, in order to improve the effectiveness of iron control during acidizing...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, December 6–7, 2021
Paper Number: SPE-204284-MS
... petrophysical alteration composition base case interaction fluid dynamics alteration gravity segregation reaction texas precipitation carbonate reservoir brine simulation result geochemical reaction co 2 injection calcite dissolution injectivity permeability Introduction Carbon...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, December 6–7, 2021
Paper Number: SPE-204350-MS
... remediation paraffin remediation scale remediation scale inhibition ppm eor polymer anion solution phosphonate inhibitor mec inhibition percentage asphaltene remediation remediation of hydrates brine eor polymer asp flooding dosage hydrate inhibition asphaltene inhibition precipitation...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193578-MS
..., rather than a linear molecule as a crystal growth inhibitor during precipitation, true nano-scale dispersions have been achieved that are stable in water, with no detectable agglomeration and that are self-dispersing after drying. This paper proposes that greater steric hindrance and smaller particle...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193551-MS
... the retarded HCl acid recipes were effective to stimulate carbonate reservoirs. Compatibility testing showed presence of significant white precipitate. ESEM analysis showed the precipitates were rod-like crystals composed of mainly of Cl and high C with small amounts of N, O, Al and Mg. TGA results showed...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193568-MS
... that essentially each new or exacerbated PC issues can be predicted or at least anticipated with the required degree of confidence before implementation of EOR. chemical flooding methods Modeling & Simulation breakthrough precipitation Upstream Oil & Gas deposition enhanced recovery polymer...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193564-MS
... under these conditions. Modeling & Simulation high pressure high temperature concentration HPHT condition ion concentration HPHT precipitation residence time barium sulphate solubility Upstream Oil & Gas Brine ion product solubility measurement complex reservoir equilibrium...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193569-MS
... factor stimulation fluid drilling fluid formulation Fluid Dynamics Sandstone Reservoir stimulation treatment reaction reservoir drilling fluid property Upstream Oil & Gas acetic acid pressure drop precipitation damage skin acid gravel pack completion permeability Introduction...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193583-MS
... formation. paraffin remediation wax inhibition asphaltene remediation scale remediation Production Chemistry remediation of hydrates Upstream Oil & Gas deposition calculation caco 3 carbonate scale prediction wax remediation oilfield chemistry scale inhibition precipitation scale...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193560-MS
... of asphaltenes precipitation and deposition. We highlight key parameters that should be optimised to ensure that chemical performance is tested against the actual functionality required in the field and under conditions that are as representative as practicable. We present a case study describing the use...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193570-MS
... of the formation water/brine and injection water/hydraulic fracturing fluid is the primary cause for scale formation. The physicochemical properties such as pressure, temperature, and pH are the secondary cause affecting scale formation in the reservoir. During hydraulic fracturing, precipitation of barite...

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