Drilling fluids are essential for drilling operations and serve many important functions. To maintain control of the wellbore, while ensuring sufficient cutting transportation, good understanding of the rheological properties ...

To prevent kicks and possible blowout of the well, the pressure from the drilling fluid must be kept above the pore pressure of the formation. This differential pressure forces the fluid into the porous formation, which ...

Denne oppgaven presenterer utviklingen av nye tetthet- og hastighets- regresjonsmodeller (enkel- og multivariate-baserte) og artificial neural network (ANN) basert modellering ved bruk av data hentet fra Barentshavet, ...

Seawater injection for Enhanced Oil Recovery (EOR) purposes can increase the hydrocarbon recovery factor in carbonate reservoirs but are also responsible for weakening their mechanical strength. This study investigates the ...

As one of the main risks related to CO2 storage is leakage, it is important to consider the impact of the reservoir uncertainties on the long-term CO2 migration and leakage which affecting the decisions in CO2 storage ...

Through-tubing abandonment is the operation where the production tubing is cut or punched and cemented inside the production casing. This can establish a full cross-sectional barrier or isolation in wells where the cement ...

This study mainly focuses on the detection and characterization of micro-annuli at the interface of cement and casing, usually caused by changes in pressure, temperature, or volume change of zonal isolation material. For ...

A preselected Wisting well injector design has been used as a basis for this study. Because of the challenges following an ultra shallow reservoir and an almost negligible stress contrast between the reservoir and cap rock, ...

The decisions made during well planning have mainly been focused on safety, cost efficiency and applicability of the design. As the climate have been getting more attention the past years, environment is now high up on the ...

Design and planning in drilling a well are a key for successful before to execute drilling operation. A good understanding of wellbore stability, design mud, casing, cementing, BHA & drillstring, drilling bit, hole cleaning ...