Temperature Augmented Visual Method for Initial Screening of Hydrate Inhibitors

Saikia, Tinku; Mahto, Vikas

doi:10.2516/ogst/2017040

Cited by 14 publications

(9 citation statements)

References 32 publications

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“…The agglomeration time may be explained as the time the slurry takes to agglomerate. Agglomeration is expressed as the magnet bead stopping totally from moving . The first induction of hydrate crystal and the corresponding temperature at the thermometer may be seen through bare eyes and the recorded video by the webcam Logitech 521.…”

Section: Methodsmentioning

confidence: 99%

“…The first induction of hydrate crystal and the corresponding temperature at the thermometer may be seen through bare eyes and the recorded video by the webcam Logitech 521. Induction time is the time observed during the experiment and in the recorded video, after which the first hydrate crystal appears in the solution. ,− The agglomeration time for this study can be elaborated by describing the crystallization of the whole THF-water slurry inside the jacketed glass beaker. This phenomenon can be characterized by stopping the magnet bead inside the beaker, which was supposed to be moving.…”

Section: Methodsmentioning

confidence: 99%

“…23 The WBDF formulations contained KCl to minimize clay swelling, maintain pH, and act as a freezing point depressant. 28 The WBDF formulations adopted in this research are prepared according to API standards. 42 The rheological parameters, i.e., plastic viscosity (PV), apparent viscosity (AV), yield point (YP), initial gel strength (10 s gel strength), and final gel strength (10 min gel strength) of the prepared drilling fluids, are assessed using a rotational viscometer (Make: OFITE, Model 800, 8-Speed Electronic).…”

Section: Low-temperature Differential Scanning Calorimetric (Dsc) Stu...mentioning

confidence: 99%

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Evaluation of the Xanthan Gum, Gum Acacia, and Their Graft Copolymers with Acrylamide as Low-Dosage Hydrate Inhibitors for Their Application in the Drilling of Gas Hydrate Reservoirs

et al. 2023

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Hydrate formation is a significant issue while drilling into deep-water reservoirs containing gas hydrates. They may form in the drilling fluid flowlines, wellbore annulus, and ram cavities of blowout preventers. The natural gums, i.e., xanthan gum (XG) and gum acacia (GA), and their two graft copolymers with acrylamide (AAm), i.e., XG-g-PAAm and GA-g-PAAm, have been synthesized and tested as low-dosage hydrate inhibitors using THF hydrate systems via temperature-augmented visual method. XG-g-PAAm and GA-g-PAAm have shown better inhibition efficiencies and higher induction times than XG and GA. All of these inhibitors are then tested as drilling fluid additives to the formulated water-based drilling fluid systems (WBDFs). The formulated WBDFs contained 0.4 w/v % of each carboxymethyl cellulose (CMC), polyanionic cellulose (PAC), and 5 w/v % of potassium chloride (KCl). The rheology of the formulated WBDFs has been tested at an ambient temperature (293 K) and low temperature (275 K). The rheological parameters of WBDFs obtained from the experiments are within permissible limits with an inhibitor concentration of 0.5 w/v %. The rheological data are then fitted to the Bingham–Plastic (B–P) model and Herschel–Bulkley (H–B) model. The coefficient of determination’s (R 2) upper and lower limits for the B–P model is 0.9715–0.9969 for 0.5 w/v % GA- and 0.5 w/v % XG-g-PAAm-containing WBDF systems. Again, for the H–B model, the range for R 2 is from 0.9891 to 0.9980 for 0.5 w/v % GA- and 0.5 w/v % XG-containing WBDFs. Hence, the R 2 showed a better agreement with the H–B model than with the B–P model. These observations suggest that XG, GA, XG-g-PAAm, and GA-g-PAAm may be used as hydrate inhibitors in the formulated WBDFs while drilling into gas hydrate reservoirs.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Low-temperature Differential Scanning Calorimetric (Dsc) Stu...mentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of the Xanthan Gum, Gum Acacia, and Their Graft Copolymers with Acrylamide as Low-Dosage Hydrate Inhibitors for Their Application in the Drilling of Gas Hydrate Reservoirs

et al. 2023

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“…in the early days. Preventing the formation of hydrates in oil and gas pipeline transportation by this method, and increasing the safety, economy and reliability of natural gas pipeline transportation [4][5][6]. In the 1980s, Vysniauskas and Bishnoi began to research on hydrate kinetics, which opened a new chapter in the safety of hydrate flow from "preventing" to "controlling" [7].…”

Section: Introductionmentioning

confidence: 99%

Investigation of hydrate slurry flow behaviors in deep-sea pipes with different inclination angles

Yao

Wang

et al. 2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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The marine area is the main direction of the development of oil and gas resources in the world. The pipeline transportation technology of natural gas hydrate slurry plays an important role in the exploitation of marine oil and gas and the exploitation of marine gas hydrate resources. In order to study the influence of pipe inclination on pipeline transportation, population balance model based on hydrate particle aggregation dynamics was coupled with the Eulerian–Eulerian two-fluid multiphase flow model to simulate the flow behaviors of hydrate slurry flow in pipes with different inclination angles. In the study, three variables of inclination, flow rate and initial particle size were considered. The results show that tilted pipes are beneficial to hydrate slurry transport rather than harmful. Meanwhile, higher flow rates and lower initial particle sizes are beneficial for promoting the flow safety of hydrate slurry transport. However, the flow pressure drop of the hydrate slurry increases with the increase of the flow rate and the decrease of the initial particle size, which is not conducive to the economics of mining. The research results in this paper can provide reference for the research of hydrate slurry flow safety and parameter guidance for hydrate solid fluidized mining.

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“…Natural Gas Hydrate (NGH) is regarded as the most promising alternative energy resource because of its wide distribution, large resources and cleanliness [1][2][3][4]. There exist three basic techniques to extract gas contained within NGH sediment, which are thermal stimulation, depressurization and chemical inhibitor stimulation [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Heat conduction and thermal convection on thermal front movement during natural gas hydrate thermal stimulation exploitation

Hao

et al. 2018

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Natural Gas Hydrate (NGH) has attracted increasing attention for its great potential as clean energy in the future. The main heat transfer mode that controls the thermal front movement in the process of NGH exploitation by heat injection was discussed through NGH thermal stimulation experiments, and whether it is reliable that most analytical models only consider the heat conduction but neglect the effect of thermal convection was determined by the comparison results between experiments and Selim's thermal model. And the following findings were obtained. First, the movement rate of thermal front increases with the rise of hot water injection rate but changes little with the rise of the temperature of the injected hot water, which indicated that thermal convection is the key factor promoting the movement of thermal front. Second, the thermal front movement rates measured in the experiments are about 10 times that by the Selim's thermal model, the reason for which is that the Selim's thermal model only takes the heat conduction into account. And third, theoretical calculation shows that heat flux transferred by thermal convection is 15.56 times that by heat conduction. It is concluded that thermal convection is the main heat transfer mode that controls the thermal front movement in the process of NGH thermal stimulation, and its influence should never be neglected in those analytical models.

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Temperature Augmented Visual Method for Initial Screening of Hydrate Inhibitors

Abstract: -The formation of gas hydrates in oil & gas pipelines and drilling fluid flow lines is a major

Cited by 14 publications

References 32 publications

Evaluation of the Xanthan Gum, Gum Acacia, and Their Graft Copolymers with Acrylamide as Low-Dosage Hydrate Inhibitors for Their Application in the Drilling of Gas Hydrate Reservoirs

Evaluation of the Xanthan Gum, Gum Acacia, and Their Graft Copolymers with Acrylamide as Low-Dosage Hydrate Inhibitors for Their Application in the Drilling of Gas Hydrate Reservoirs

Investigation of hydrate slurry flow behaviors in deep-sea pipes with different inclination angles

Heat conduction and thermal convection on thermal front movement during natural gas hydrate thermal stimulation exploitation

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