..., such as compressive strength, permeability, and porosity, to provide a stable, mixable, and pumpable slurry design. Changes in downhole conditions in terms of temperature and pressure can induce sufficient stresses to destroy the integrity of the cement sheath, causing long-term gas migration and sustained annular...

... Abstract Main factors which are responsible for the corrosion of the cement sheath in wells are determined based on lab tests and field analyses from a literature survey. A description of the chemistry, mineralogy, physical properties of API well cements and their mechanisms of corrosion...

... Also we change the Young's modulus of the formation to see the influence on the stress distribution of the cement sheath. Fig.12 and Fig.13 show us the radial stress and tangential stress at horizontal direction at the inner surface of the cement sheath as a function of formation Young's...

... characteristic oilfield friction resistance drillstem testing reservoir formation objective layer hydraulic fracturing thick formation log analysis ted entry asia government development china government cement sheath geologist density perforation upstream oil & gas well logging diameter...