Influence of permafrost temperature on casing strings collapse
UDC: 622.245.1
DOI: 10.33285/0130-3872-2023-9(369)-32-35
Authors:
KOROTKOV SERGEY A.
1,
STARIKOVA POLINA V.1,
OVCHINNIKOV VASILY P.2
1 SibGeoProject, Tyumen, Russia
2 Tyumen Industrial University, Tyumen, Russia
Keywords: permafrost area, permafrost soils, collapse, structure, reverse freezing, annular pressure
Annotation:
Collapse of casing strings is a common problem when constructingwells in the fields of the Far North. The main cause of collapse is considered to be the process of freezing back, which occurs when the well is idle. But it is also necessary to take into account the abnormally high pressures in the annular space during freezing in a closed volume of water formed due to cement stone sedimentation defects. The article considered the permafrost temperature influence on the pressure in the annular space as well as carried out the deposit zoning according to the probability of collapse in different areas.
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