The cement sheath, serving as the primary element of well barriers, plays a crucial role in
maintaining zonal isolation, protecting the casing from corrosion, and providing mechanical …

During large-scale multistage hydraulic fracturing in shale-gas wells, the cement sheath
loses its integrity easily because of repeated temperature and pressure variations in the …

In conventional wellbore-integrity analysis, the cement sheath's initial state of stress and
transient thermoporoelastic effects are often neglected. However, the initial state of stress is …

Abstract Sustained Casing Pressure (SCP) has become a serious problem in the
development of shale gas fields, which is believed to relate to the multistage fracturing …

Sustained casing pressure (SCP) in shale gas wells has been of growing interest in the
industry, owing to its effects on the safety and efficiency of shale gas production. In terms of …

This paper reviews the state of research in permanent barrier materials for plug and
abandonment of oil and gas wells to identify key strengths and weaknesses of each barrier …

Aiming at casing damage in the salt rock, the creep characteristics of the salt rock in the
southeastern China are investigated by triaxial creep test. Based on the experimental …

During large-scale hydraulic fracturing in shale gas horizontal wells, a cement sheath easily
loses its integrity due to the fluctuation and continuous change of wellbore temperature and …

A comprehensive experimental investigation of Portland cement hydration kinetics in a wide
temperature range from 35° C to 150° C with pressure up to 50 MPa was performed by heat …

The failure of cement sheath integrity can be easily caused by alternating pressure during
large-scale multistage hydraulic fracturing in shale-gas well. An elastic-plastic mechanical …