Drilling operations encounter various problems, many of which affect mud quality and may
delay or suspend drilling. Wellbore instability is one of the many problems that drilling …

Drilling fluid with proper rheology, strong shale, and hydrate inhibition performance is
essential for drilling ultralow temperature (as low as− 5° C) wells in deepwater and …

High temperature in geothermal and deep wells is a major reason for the instability of drilling
fluids. As a result of changes in their chemical and physical properties, problems such as …

Drilling fluid constitutes an important part of the drilling operations. Drilling mud is circulated
into the wellbore to minimize the formation damage, transport cuttings from the bottom to the …

This study focuses on the feasibility of reusing formation water as inhibitive base water for
water-based drilling fluids (WBDFs) to reduce the need for freshwater and commercial salts …

Oil and gas drilling contractors face many challenges during drilling, mainly related to
wellbore instability. The water-based drilling fluids (WBDFs) are mixed with various swelling …

Regarding the increasing production from unconventional reservoirs, especially shale
reservoirs, it is essential to determine appropriate drilling fluid in drilling operations to have …

Wellbore (in) stability while drilling shales is a major problem for the petroleum industry. The
drilling of a hole into a formation in equilibrium induces stress concentration around the …

This research work outlines the main results of the shale instability study with respect to
shale/fluid interaction mechanisms, and also analyses the shale strength properties. An …

Drilling the U-formation (shale and sandstone) in Saudi Arabia requires high drilling fluid
density (±95 lbm/ft3) to mechanically stabilize the shale and balance the reservoir pressure …