Study on the effect of interface failure between casing and cement sheath on casing stress under non-uniform in-situ stress
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DOI: 10.1016/j.apm.2020.10.007
Abstract: Abstract The interface failure (micro-annulus and de-bonding) at the first interface between cement sheath and formation, or at the second interface between cement sheath and casing can be easily caused by alternating change of internal… read more here.
Keywords: interface; cement sheath; stress; failure ... See more keywords
Effect of thermal expansion annulus pressure on cement sheath mechanical integrity in HPHT gas wells
Sign Up to like & getrecommendations! Published in 2017 at "Applied Thermal Engineering"
DOI: 10.1016/j.applthermaleng.2017.02.075
Abstract: Abstract In HPHT gas wells, thermal expansion annulus pressure might threaten the mechanical integrity of the cement sheath. To analyze the effect of the thermal expansion annulus pressure on the cement sheath mechanical integrity, the… read more here.
Keywords: thermal expansion; expansion annulus; annulus pressure; cement sheath ... See more keywords
Elasticity solution for the casing under linear crustal stress
Sign Up to like & getrecommendations! Published in 2018 at "Engineering Failure Analysis"
DOI: 10.1016/j.engfailanal.2017.11.007
Abstract: Abstract The integrity of the casing is crucial for oil and gas well. Based on stress function method, a three-dimensional model of the casing-cement sheath-formation system subjected to linear crustal stress is proposed. And then… read more here.
Keywords: cement sheath; linear crustal; crustal stress; stress ... See more keywords
Effects of in-situ stress and elastic parameters of cement sheath in salt rock formation of underground gas storage on seal integrity of cement sheath
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DOI: 10.1016/j.engfailanal.2021.105258
Abstract: Abstract The cement sheath seal integrity is crucial for a safe operation of underground gas storage. Owing to its creep characteristics, the salt formation squeezes the cement sheath, which may cause failure of the cement… read more here.
Keywords: salt rock; sheath; cement sheath; seal integrity ... See more keywords
A wellbore cement sheath damage prediction model with the integration of acoustic wellbore measurements
Sign Up to like & getrecommendations! Published in 2019 at "Geothermics"
DOI: 10.1016/j.geothermics.2019.03.007
Abstract: Abstract This paper presents an analytical method of predicting cement sheath integrity with incorporation of wire-line acoustic measurements on an example of a deep, high-temperature geothermal well, located in central part of the Los Humeros… read more here.
Keywords: sheath damage; sheath; prediction model; damage prediction ... See more keywords
Parametric Study of Mechanical Stresses within Cement Sheath in Geothermal Wells
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DOI: 10.1016/j.geothermics.2020.102000
Abstract: Abstract A cement sheath, placed between the casing and the formation, is an important barrier that establishes a hydraulic seal and provides zonal isolation, preventing fluid communication in the wellbore. In geothermal wells, stress induced… read more here.
Keywords: temperature difference; cement; stress; cement sheath ... See more keywords
A new numerical investigation of cement sheath integrity during multistage hydraulic fracturing shale gas wells
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Natural Gas Science and Engineering"
DOI: 10.1016/j.jngse.2017.11.027
Abstract: Abstract Volume fracturing of shale gas wells has been observed to lead to the failure of cement sheath and to sustained casing pressure (SCP). This paper presents a new numerical investigation aimed at understanding the… read more here.
Keywords: stresses cement; cement sheath; radial tangential; tangential stresses ... See more keywords
A novel way to look at the cement sheath integrity by introducing the existence of empty spaces inside of the cement (voids)
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Natural Gas Science and Engineering"
DOI: 10.1016/j.jngse.2020.103274
Abstract: Abstract Horizontal drilling and hydraulic fracturing enabled the extraction of hydrocarbon from tight formations in countries such as the United States, China, and Argentina. Some factors such as stress anisotropy, formation temperature and quantity of… read more here.
Keywords: cement sheath; novel way; cement; integrity ... See more keywords
Cement sheath integrity of shale gas wells: A case study from the Sichuan Basin
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DOI: 10.1016/j.ngib.2017.11.004
Abstract: Abstract Sustained annulus pressure and casing deformation of gas wells are common in several shale gas demonstration areas in the Sichuan Basin. In view of this, the conditions for pressure change inside the wellbore in… read more here.
Keywords: pressure; gas wells; gas; cement sheath ... See more keywords
Responses and data inversion of four-detector scattered-gamma-ray logging in cased holes
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DOI: 10.1016/j.petrol.2017.10.001
Abstract: Abstract In cased holes, detector response of scattered-gamma-ray logging tool is subject to casing, cement sheath, and formation density, while the logging result requires four parameters—casing thickness, cement sheath density, cement sheath thickness, and formation… read more here.
Keywords: cement sheath; formation; detector; density ... See more keywords
Numerical simulation of the thermomechanical behavior of cement sheath in wells subjected to steam injection
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Petroleum Science and Engineering"
DOI: 10.1016/j.petrol.2018.04.023
Abstract: Abstract The exposure of oil wells to extreme conditions may lead to numerous problems associated with the loss of integrity of the cement sheath. A damaged cement sheath may result in fluid leakage and in… read more here.
Keywords: cement; steam injection; cement sheath;