Browsing Faculty of Science and Technology by Title
Now showing items 6958-6977 of 7047
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Well control procedures and simulations
(Masteroppgave/UIS-TN-IPT/2011;, Master thesis, 2011)A brief introduction is given to a range of well control procedures. It was found that many of the procedures rely on a set of simplifying assumptions. This is particularly true in the hand calculations for designing a ... -
Well decommissioning using BHGE's subsea wellhead terminator
(Masteroppgave/UIS-TN-ISØP/2019;, Master thesis, 2019-06)The world’s portfolio of oil and gas wells are ageing. Plug and abandonment is the final and inevitable stage of every well. As a result, decommissioning is set to grow steadily in the coming years, as more and more wells ... -
Well design considerations for CO2 injection at Prelude
(Masteroppgave/UIS-TN-IPT/2011;, Master thesis, 2011-06-15)The global economy is set to grow four-fold by 2050, promising economic benefits and a higher standard of living for millions. At the same time the global community is uniting in an effort to combat global warming. Achieving ... -
Well Design With an Environmental Focus
(Masteroppgave/UIS-TN-IEP/2020;, Master thesis, 2020-08)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 ... -
Well engineering simulation (WellPlanTM) challenges and uncertainties in drilling engineering
(Student paper, others, 2014-05-20)The report work on this laboratory simulation, will be simulated a Drilling Operation to identify the challenges that this operation carries, and how to mitigated them. Nowadays, the high demand by Operators to drill ... -
Well Modelling of H2S Production on a Field in the North Sea
(Masteroppgave/UIS-TN-IEP/2018;, Master thesis, 2018-06)Hydrogen sulphide production can prove to be a very costly affair for exploration and production companies. Failure to implement efficient H2S control and mediation strategies can lead to a decrease in production assets, ... -
Well monitoring from om-the-fly analysis of data from Permanent Downhole Gauges (PDGs)
(Masteroppgave/UIS-TN-IER/2019;, Master thesis, 2019-06-15)The thesis focuses on time-lapse Pressure Transient Analysis (PTA) of data acquire with Permanent Downhole Gauges (PDGs). The objective is to develop and test approaches in automation of time-lapse PTA. Helping in providing ... -
Well P&A Tubing Compaction Method Evaluation and Modelling
(Masteroppgave/UIS-TN-IPT/2017;, Master thesis, 2017-07-13)The number of aged fields in the North Sea is increasing, and in few years, and there will be a significant increase in number of wells that need to be permanently plugged and due to low oil prices and other reasons, there ... -
Well stability in shale formations
(Masteroppgave/UIS-TN-IPT/2014;, Master thesis, 2014-06-16)Well instability in shale formations has been a very major problem due to physiochemical interactions between drilling fluid and formation. In this thesis, chemical, thermal and diffusion effects on the well collapse ... -
Wellbore Collapse Failure Criteria and Drilling Optimization
(Masteroppgave/UIS-TN-IEP/2019;, Master thesis, 2019-06-15)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 ... -
Wellbore stability analysis for an extended-reach well on Ekofisk
(Master thesis, 2022) -
Wellbore stability and rock mechanics study on the Ula field
(Masteroppgave/UIS-TN-IPT/2013;, Master thesis, 2013-06-20)In the years to come more challenging drilling conditions will occur when the last reserves need to be collected. More directional drilling will be used and good wellbore conditions will be necessary to make this possible. ... -
Wellhead Fatigue Analysis : Surface casing cement boundary condition for subsea wellhead fatigue analytical models
(;163, Doctoral thesis, 2012-05-31)Material fatigue is a failure mode that has been known to researchers and engineers since the 19th century. Catastrophic accidents have happened due to fatigue failures of structures, machinery and transport vehicles. ... -
Wet Drilled Cuttings Bed Rheology
(Peer reviewed; Journal article, 2021)The cuttings transport efficiency of various drilling fluids has been studied in several approaches. This is an important aspect, since hole cleaning is often a bottleneck in well construction. The studies so far have ... -
Wet-granular rheology to measure cuttings-bed strength
(Peer reviewed; Journal article, 2021)Drilled cuttings-bed formation is a natural process during wellbore drilling operations, although it is not desired. To optimally remove the drilled cuttings out of the wellbore it is important to break the formed beds. ... -
Wettability alteration in carbonates : the effect of water-soluble acids in crude oil and application of enzyme for wettability alteration
(Masteroppgave/UIS-TN-IPT/2010;, Master thesis, 2010)The objective of the project is defined in two phases. The first phase is to study the effect of oil composition and carboxylic acids in the crude oil on the wetting condition and wettability alteration process using ... -
Wettability alteration in carbonates: the effect of water-soluble carboxylic acids in crude oil
(Journal article; Peer reviewed; Doctoral thesis, 2010)Acidic components in crude oil influence the wetting condition through their effect on electrostatic interactions with the mineral surfaces. In this paper, we have extracted water-soluble acids from a crude oil with a high ... -
Wettability in chalk, effect of initial water saturation on the adsorption of polar oil components
(Masteroppgave/UIS-TN-IPT/2016;, Master thesis, 2016-06)Experimental study of wettability alteration was aimed at three laboratory designated chalk material, collected from the same reservoir block, at different initial water saturations (0%, 10%, and 40%). Crude oil sample ... -
Wettability in chalk, effect of temperature on the adsorption of the acidic components in crude oil
(Masteroppgave/UIS-TN-IØRP/2013;, Master thesis, 2013)The initial wetting of carbonate reservoirs will affect the overall oil recovery and the potential of EOR methods linked to wettability alteration by the generation of positive capillary pressure. Polar acids in oil also ... -
What are the costs of currency hedging for Norwegian high yield funds, and what is the optimal hedge strategy to limit these costs?
(Master thesis, 2021)As Norwegian high yield funds invest in foreign denominated assets, a risk associated with the exchange rate fluctuations occur and adds to the underlying risk of the asset. A common approach to this added risk is to utilize ...