Zonal isolation is significant for safety operation of the well. Failure to keep wellbore integrity
can lead to sustained annulus pressure (SAP), and gas migration (GM), which may cause …

Organic-rich shales have been contributing significantly to gas production in the US, led by
new developments in horizontal drilling and hydraulic fracturing techniques. Shales have …

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 …

Reducing energy consumption during drilling operations is beneficial to both the
environment and economy. Frictional drag reducers (FDR) are widely used to reduce the …

The main goal of cementing is to provide reliable zonal isolation throughout the life of a well.
The integral of cement protects the casing and prevents fluid formation from migration. This …

Geopolymers have emerged as a promising alternative to Portland cement for oil and gas
wells. Achieving effective zonal isolation by use of geopolymers may require controlling their …

Wells with compromised integrity can cause groundwater/soil contamination and increased
carbon emissions. Given that there are more than 3.7 million abandoned wells in existence …

Eccentricity of the casing frequently exists in actual drilling process. This is one of the main
reasons responsible for poor mud and cement displacement. In such cases, zonal isolation …

Led by new developments of horizontal drilling and hydraulic fracturing techniques, organic
rich shales have been contributing significantly to a gas production in the US. In drilling …

After a kick occurs during petroleum drilling, the rapid and accurate prediction of abnormal
pore pressure is the basis for taking proper well control measures. In this work, we build an …