Casing Bearing Capacity with Shear Load for Shale Gas Wells

Abstract:

Casing radial deformation during complex fracturing process was seriously for shale gas wells in Sichuan district of China, and the average casing deformation rate in the region is of 50%. The bridge plug, perforating gun and other tools cannot successfully pass with deformed casing. Aiming at the 3-D logging morphology for deformed casing of shale gas wells, the failure modes and mechanisms were analyzed by using elasticity and theoretical mechanics. Many factors were evaluated and integrated to achieve quantitative evaluation model including geology feature, wellbore trajectory, cement property, casing material and hydrofracture process. With the aid of the self-developed unconventional oil and gas well casing simulation test equipment, the casing bearing capacity with shear load were carried out, established the relationship between shear load value and radial deformation, and further constructed the casing failure criterion with shear force. This work can provide technical support for casing design and selection in shale gas wells.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 1190-1195
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.1190
• Online since: May 2020
• Authors: Shang Yu Yang*, Jian Jun Wang, Jia Wen Han, Hang Wang, Li Hong Han
• Keywords: Bearing Capacity, Casing Deformation, Shale Gas, Shear Load

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