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 …

Purpose. Development of effective composite plugging systems for reliable fastening of oil
and gas wells in difficult mining-geological conditions of deposits of Ukraine. Methods. The …

Shale gas development usually uses large displacement horizontal well and staged
fracturing technology to increase operation production. The complex environmental and …

The loading rate has a significant influence on the mechanical parameters tests of cement
stone, which lacks systematic research. There are no corresponding optimal loading rates …

Fluid channeling caused by seal failure at the cement sheath-formation interface during
fracturing is a severe problem in oil gas wells. In this study, a novel model was developed to …

The failure of wellbore sealing will cause leakage of greenhouse gases, such as carbon
dioxide and methane, which will harm oil and gas recovery and environmental safety …

The features and prospects of hydrocarbon potential of Ukraine are analyzed. It is
established that the basic resource of oil and gas deposits is concentrated in difficult mining …