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Keywords: permafrost
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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-24-306
... ABSTRACT Oil and gas drilling in polar tundra has the problem of wellhead destabilization and sinking caused by permafrost thawing. In this paper, the water content of the soil around the surface conduit, the upper wellhead load and the temperature of circulating liquid in the wellbore...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-1286
... Abstract Fundamental understanding of permafrost thawing behaviour and the ability to model it numerically are vital to predict the effects of permafrost thawing on infrastructure. This paper presents insight into numerical modelling of frozen soil using frozen-unfrozen soil constitutive model...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1117
... the geophysical and geochemical anomalies related to NGH in plateau permafrost regions. However, at present, each exploration method is independent of each other. Only a simple combination of multiple exploration results has been often used to conjecture the favorable area. This method is practical when...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-598
... ABSTRACT The article presents results of permafrost scientific research in the Khatanga bay of the Laptev sea. Field works were organized in early spring 2017 by Rosneft Oil Company with participation of Lomonosov Moscow State University, Far Eastern Federal University and Arctic Research...
Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-682
... Abstract Permafrost is ground that remains below 0°C for more than two years. Design of pipelines across permafrost terrain differs from that of pipelines where there is no permafrost. A buried pipeline is subject to a variety of internal and external loads such as frost heave and thaw load...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-148
... Abstract Compared with marine gas hydrate, continental gas hydrate in Muli permafrost Qilian Mountain has a discontinuous vertical distribution and bad horizontal relativity, in addition, no BSRs or other reliable marks can be used. So gas hydrate exploration methods of permafrost have obvious...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-028
... loading ratio secondary creep unfrozen water content specimen strength mechanical behavior creep test canadian geotechnical journal engineering creep characteristic permafrost creep ladanyi unconfined compressive strength creep response Creep Behavior of Frozen Sands Deokho Chae1...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-135
... Abstract It is a universal phenomenon for gas hydrate associated carbonates in subsurface sediments, but it is rarely reported in the permafrost. Based on microscopic observations and mineral analyses on carbonates associated with gas hydrate, mineral species and occurrence modes of carbonates...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-151
... Abstract Subject to the severe interference of bacterial gas and coal-bed gas of the marsh area, the geochemical exploration over surface hydrate in Muli permafrost of Qilian Mountains takes on widely distributed methane geochemical anomalies. The natural thermoluminescence hydrate prospecting...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-037
... by relict, degrading permafrost and in situ hydrates. Hydrate degradation results in an increase in pore pressure due to the "Self Preservation" effect. This paper presents a tool for predicting upper bound pore pressure gradients arising from melting hydrates. The model was successfully tested against...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-109
... ABSTRACT This study presents the efficiency of a method combining the pile foundation and a thermosyphon proposed as a method for ensuring thermal stability of the ground. The prototype of the thermosyphon was placed in the ground at King Sejong Station in permafrost Antarctica...
Proceedings Papers

Paper presented at the The Twenty-first International Offshore and Polar Engineering Conference, June 19–24, 2011
Paper Number: ISOPE-I-11-077
... ABSTRACT: North of the Brooks Range, permafrost is continuous, ice-rich with wide occurrence of massive ground ice at different depths. The active layer is thin and saturated. In northern Alaska, ice wedges are the main type of massive ground ice and ice-wedge polygons occupy nearly the entire...
Proceedings Papers

Paper presented at the The Twenty-first International Offshore and Polar Engineering Conference, June 19–24, 2011
Paper Number: ISOPE-I-11-078
... the essential task of providing zonal isolation like the conventional cements but at the same time these cements need to have unique characteristics to set in cold temperatures and protect the permafrost from deteriorating during the production operation. "Permafrost" is the region that has remained frozen...
Proceedings Papers

Paper presented at the The Twentieth International Offshore and Polar Engineering Conference, June 20–25, 2010
Paper Number: ISOPE-I-10-551
... is fresh and grows down from the surface until it reaches the bottom sediments. Depending on ice thickness, water depth and other factors, the ice may bond to the bottom and initiate freeze-back of sediment. If there is permafrost at depth, then freeze-back may reach the permafrost. Frozen sediments...
Proceedings Papers

Paper presented at the The Nineteenth International Offshore and Polar Engineering Conference, July 21–26, 2009
Paper Number: ISOPE-I-09-137
...,2002). CLIMATE CHANGES Effects of Climate Changes on Oil and Gas Activity Thawing of ice-rich permafrost creates damage to infrastructure, including oil and gas extraction and transportation facilities, and climate warming will exacerbate existing subsidence problems (Instanes et al, 2005). These risks...
Proceedings Papers

Paper presented at the The Nineteenth International Offshore and Polar Engineering Conference, July 21–26, 2009
Paper Number: ISOPE-I-09-142
... surfaces of the tundra zone. FEATURES OF DEVELOPMENT OF EROSION OF A SOIL- VEGETATIVE COVER IN CONDITION OF THE FAR NORTH Formation and development of the erosional pattern in the tundra is defined mainly by specific zone lithology, in particular - close occurrence of permafrost and subsurface ice. Surface...
Proceedings Papers

Paper presented at the The Sixth International Offshore and Polar Engineering Conference, May 26–31, 1996
Paper Number: ISOPE-I-96-138
... variation node 49 node 84 permafrost ice-debris mixture whalley creep behaviour thermal condition node 15 field measurement proceedings glacier azizi gradient Proceedings of the Sixth (1996) -International Offshore and Polar Engineering Conference (1996) Los Angeles, USA May 26-31, 1996...
Proceedings Papers

Paper presented at the The Fifth International Offshore and Polar Engineering Conference, June 11–16, 1995
Paper Number: ISOPE-I-95-144
... give an interpretation of the past climate at a time of rapid change. debris technology conference rock glacier node 19 calculation permafrost deformation glacier protalus lobe periglacial process creep behaviour finite element displacement mesh 04 creep property proceedings...
Proceedings Papers

Paper presented at the The Fifth International Offshore and Polar Engineering Conference, June 11–16, 1995
Paper Number: ISOPE-I-95-101
... by Gazprom. There were, in addition, some geotechnical data gathering programs included in the contract. permafrost interface construction salinity simulation pipe temperature water content onshore section thaw settlement interface pipeline pigging thaw depth permafrost upstream oil...
Proceedings Papers

Paper presented at the The Fourth International Offshore and Polar Engineering Conference, April 10–15, 1994
Paper Number: ISOPE-I-94-043
... conditions, such as those found in sediments beneath permafrost and ice-sheets in the cold regions and beneath the seafloor at water depths greater than about 200m. Recently, a great deal of attention has been focused on natural gas hydrates as they may contribute to future energy supplies. Gas hydrates also...

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