Overbalanced drilling is the most common drilling technique; nevertheless, it has several
disadvantages such as formation damage, mud losses, and stuck pipes; challenges that are …

The wellbore stability of a vertical well through the sandstone reservoir layers of the Asmari
oil-bearing formation in south-west Iran is investigated. The safe drilling-fluid density range …

Abstract Analysis of wellbore instability contains evaluation of rock mechanical properties
and the state of in-situ stresses. In this analysis the only convenient factor is the mud weight …

During drilling operation, the occurrence of borehole instability is one of the major problems
in which many parameters can affect the wellbore stability. In many cases, wellbore …

Drilling well design optimization reduces total Authorization for Expenditures (AFE) by
decreasing well constructing time and expense. Well design is not a constant pattern during …

Complex structures with different stress regimes pose challenges in tectonic studies and
have implications for the oil and gas industry. The analysis of in-situ stress state and natural …

Wellbore instability is one of the significant challenges in the drilling engineering and during
the development of carbonate reservoirs, especially with open-hole completion. The …

Underbalanced drilling (UBD) of horizontal wells has been one of the efficient technologies
in the exploration and development of oil and gas fields, while wellbore instability poses a …

The stability of the horizontal long section of a wellbore is the main restriction of efficient
development of shale gas. The use of oil-based drilling fluids in the initial stage of Longmaxi …

Borehole instability in the petroleum industry is mainly because of mechanical, chemical,
and thermal factors which result in substantial yearly expenditures. The essential part of …