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Keywords: hydrate dissociation
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Proceedings Papers

Paper presented at the The 34th International Ocean and Polar Engineering Conference, June 16–21, 2024
Paper Number: ISOPE-I-24-074
... intense hydrate dissociation and shorten the effective production cycle, but the total temperature drop in the porous medium is smaller. The average gas flow velocities under the higher ambient temperature is higher. The findings imply that an suitable ambient temperature is conducive to the production...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-004
... reservoir pressure difference can accelerate the hydrate dissociation. The permeability variations are basically consistent with hydrate saturation. INTRODUCTION With the shifting of current energy structure, natural gas hydrate attracts attention all over the world as a huge green energy resource (Shao...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-001
... geologist flow assurance scale remediation wax remediation dissociation co 2 formation process hydrate formation video observation yamamoto microscope video camera gas hydrate formation geology production chemistry hydrate remediation paraffin remediation hydrate dissociation pressure...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-099
... reservoir simulation depressurization variation gas hydrate ngh-bearing layer heat capacity porous medium hydrate phase transition saturation hydrate phase transition hydrate saturation hydrate dissociation marine ngh-bearing layer physical field field variation Proceedings of the Thirty...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-1166
... and Stratum Response to Marine Hydrate Dissociation Directed by Depressurization Benjian SONG, Yufa HE, Qi FAN, Zhuang WU, Bo YANG, Yunjian ZHOU CNOOC Research Institute, State Key Laboratory of Natural Gas Hydrate Beijing, China ABSTRACT surface because of heterogeneous phase reaction (Feng et al., 2012...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-1187
... a gas-liquid-solid phase slurry structure after the hydrate dissociation. The rheological of hydrate sediments slurry is a typical multiphase nature depended on the sediments concentration, temperature and shear rate. Nair et al. (2019a, 2019b) studied the rheological behavior through the different...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2215
... ABSTRACT Cracks may be created in clays after gas hydrate dissociates. More cracks can be created in clays with a high degree of gas saturation after dissociation and the degree of gas saturation is linked to peak undrained shear strength of the clays through experimental tests. A damage model...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-660
... ABSTRACT In this work, we studied the step-down dissociation process of methane hydrate in three typical inorganic salt solutions (sodium chloride, potassium chloride and calcium chloride). Based on the experimental results and Kim-Bishnoi model, a kinetic model of hydrate dissociation...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-664
... collapse area is an elliptical area with its long axis along the direction of minimum horizontal stress. Moreover, compared with low density drilling fluids, hydrate dissociation is the major contributor to the collapse of borehole in hydrate reservoir. Besides, the collapse ellipse becomes flatter...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-635
... saturation hydrate dissociation gas hydrate dissociation process reservoir propane gas experiment enhanced recovery concentration equilibrium temperature hydrate reservoir sakamoto acid injection hydrate dissociation process dissociation temperature methane hydrate gas production...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-253
... plastic failure. Moreover, the undrained shear strength of clay sediment containing hydrate increases about 1∼7 times than that of clay sediment and decreases by 50% after hydrate dissociation. INTRODUCTION Gas hydrates, as a potential energy resource, are usually occurring as ice-like solids...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-246
... or pressure changes, the pore pressure increases associated with volume expansion of the gas released during gas hydrate dissociation will likely result in fractures filled with pressurized fluid products open accompanied by softening of soil in gas and water intrusion zone together with seafloor...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-163
..., was caused by thermal dissociation of GH (Bugge et al., 1987). Hydrate dissociation is also thought to be the main reason for the US mid-Atlantic coast slides with the continuous rise of the sea water temperature (Jung and Peter, 2004). These events caused heavy tsunamis and widespread flooding...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-067
... or dissolved gas 3) high pressure and, especially, 4) lower temperature. The geothermal gradient is very important for hydrate formation or hydrate dissociation. In offshore environments the gradient can vary from 1.2 to 4.2 oC/100 m (0.65 to 2.3 oF/100 ft.) Fig. 1 (Jones et al., 2010) shows a general scheme...
Proceedings Papers

Paper presented at the The Twentieth International Offshore and Polar Engineering Conference, June 20–25, 2010
Paper Number: ISOPE-I-10-323
... in terms of total gas production and Productivity as well. The variations of temperature field with the time elapsing reflected directly the advancement of hydrate dissociation front. It is difficult to produce all the MH in a reservoir simply with thermodynamic inhibitor injection because it gets harder...
Proceedings Papers

Paper presented at the The Twentieth International Offshore and Polar Engineering Conference, June 20–25, 2010
Paper Number: ISOPE-I-10-289
... is about 60–70 billion tons (Wu, et al. 2008). So gas hydrate is regarded as a kind of future energy due to its tremendous reserve and widespread deposition. A lot of laboratory experiments have been carried out to study gas hydrate dissociation (Akihiro, et al. 2008; Taro, et al. 2008; Sun, et al...
Proceedings Papers

Paper presented at the The Nineteenth International Offshore and Polar Engineering Conference, July 21–26, 2009
Paper Number: ISOPE-I-09-175
... Based on an assumed vertical pipeline in seabed, which contains sand and gas hydrate sediment, the deformation and stress of pipeline and sediment are numerically simulated with the different area of gas hydrate dissociation by using the business software ABAQUS. The effects of gas hydrate...
Proceedings Papers

Paper presented at the The Nineteenth International Offshore and Polar Engineering Conference, July 21–26, 2009
Paper Number: ISOPE-I-09-324
... A mathematical model is developed to simulate the hydrate dissociation by depressurization in hydrate-bearing porous media. It can interpret the effects of flows of multiphase fluids, the kinetic and endothermic processes, ice-water phase equilibrium, convection and conduction on the hydrate...
Proceedings Papers

Paper presented at the The Nineteenth International Offshore and Polar Engineering Conference, July 21–26, 2009
Paper Number: ISOPE-I-09-182
... This paper presents a model for natural gas hydrate dissociation from the methane hydrate reservoir by depressurization or temperaturefalling of the well. In this model, the controlling equations are consisted of quality conservation, momentum equilibrium and energy conservation equations. Four...

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