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Casing deformation occurs during the development of Changning–Weiyuan national shale gas demonstration Area in the Sichuan Basin. In view of this, the correlation between the casing deformation and the geological characteristics as well as hydraulic fracturing was analyzed. It is shown that fracture and bedding (hereinafter collectively referred to as fractures) in faults are the internal cause for...
In the Changning–Weiyuan national shale gas demonstration area, SW Sichuan Basin, the wellbore integrity damage occurs in some shale gas wells and has direct effect on the gas production rate of single shale gas horizontal well. After statistics analysis was performed on the problems related with wellbore integrity, such as casing damage, casing running difficulty and cement sheath blow-by, the multi-factor...
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