Blar i Institutt for geovitenskap og petroleum på tittel
Viser treff 370-389 av 2540
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A case study on time-dependent bedding plane failure
(Journal article; Peer reviewed, 2023)Time-delayed wellbore failures are often observed in shale formation. In some cases, cavings indicating bedding plane failure are observed a few days after initial drill-out with a gradual increase, eventually leading to ... -
Casing Design and Barriers Related to Shallow Gas
(Master thesis, 2011)The top hole section in an offshore well is conventionally drilled riserless utilizing seawater with high viscosity sweeps for cuttings removal. In recent years, the possibility of eliminating the pilot hole and setting ... -
Casing Wear: Analysis of Field Experience and Current Models
(Master thesis, 2013)Accurate casing wear prediction is important for well integrity evaluations.Some advanced well constructions have the casing exposed to reservoir fluidsand these casings are often in chrome material for corrosion resistance. ... -
CDF study of two-phase flow in helico-axial pump stage
(Master thesis, 2018)Pumping is an essential part of the process of several industries. Pumping and processing fluids with different properties have revealed to be among the major challenges in the last decades. In the oil and gas industry, ... -
Cement Displacement Efficiency in Rough Pipes
(Master thesis, 2017)Research within casing string cementing is important in the oil industry. The integrity of an oil well is dependent on the quality of the cement job, and a poor cement job can put the environment, company economics and ... -
Cement Displacement Efficiency in Smooth and Rough Pipes - An Experimental and Theoretical Investigation
(Master thesis, 2016)Researches in the industry have always ascertained that mud channels affect the two principal objectives of primary cement job; zonal isolation and structural support. This can lead to envi- ronmentally, operationally ... -
Cement Plug Integrity for Well Abandonment
(Doctoral theses at NTNU;2020:30, Doctoral thesis, 2020)Permanent abandonment marks the end of the life of an oil or gas well. Accordingly, the penetrated formation must be isolated, preventing fluid flow to the surface or surrounding formation, with a purpose to give long-term ... -
Cement Sheath Integrity During Thermal Cycling
(Doctoral thesis at NTNU;2015:291, Doctoral thesis, 2015)In the construction process of oil and gas wells, primary cementing constitutes a critical procedure of placing a cement sheath in the annulus between casing and formation, or between the casing strings. The main purpose ... -
Cement sheath modification using nanomaterials for long-term zonal isolation of oil wells: Review
(Journal article; Peer reviewed, 2017)Well cementing is an important operation during drilling and completion of oil wells. The cement sheath must maintain well integrity behind the casing and provide long-term zonal isolation to ensure safety and prevent ... -
CEMENTING THE 20 INCHES SURFACE CASING
(Master thesis, 2014)The placement of cement in annulus behind the casing is a important operation in an oil well s life. To ensure zonal isolation, the fluid in place in the annulus has to be completely displaced by the slurry. Poor excess ... -
Cements for tunnel grouting – Rheology and flow properties tested at different temperatures
(Journal article; Peer reviewed, 2019)This paper presents work being carried out in Work Package 3 of TIGHT (True Improvement in Grouting High pressure Technology for tunnelling) project. The objective is to investigate flow and mechanical properties of three ... -
Cenozoic Seismic Stratigraphy of the Northern North Sea - The Application of Regional Scale 3D Data.
(Master thesis, 2012)Methodology: Seismic interpretation using seismic- and sequence stratigraphic principles and well data. Calculations of thicknesses, volumes and accumulation rates using depth converted interpretations. Results/Findings: ... -
Cenozoic Seismic Stratigraphy of the Northern North Sea: The Application of Regional Scale 3D Data.
(Master thesis, 2012)Methodology: Seismic interpretation using seismic- and sequence stratigraphic principles and well data. Calculations of thicknesses, volumes and accumulation rates using depth converted interpretations.Results/Findings: A ... -
CFD simulation of the clogging process in a sphere pack
(Master thesis, 2022)Fenomenet med borevæske som slipper ut fra brønnen og inn i formasjonen under boring av en oljebrønn er kjent som tapt sirkulasjon (lost circulation). Ved siden av økonomiske tap på grunn av tapt tid ved boring, er det ... -
Challenges associated with the construction of vertical and inclined shafts in the Himalayan Region
(Chapter, 2023)In the Nepal Himalayas, hydropower projects having an installed capacity of over 10MW usually consist of underground waterways. Most of these underground waterways consist of vertical or inclined pressure shafts, which are ... -
Challenges of Tunnelling in the Capital Area of Iceland - Engineering Geological Evaluation of a Tunnel for a Proposed Fast Train Between Reykjavík and Keflavík
(Master thesis, 2018)As part of a possible railway connection from Reykjavík to the airport in Keflavík, an approximately 15 km long, single track tunnel, between Vatnsmýri and Straumsvík has been proposed. If built, this will be the first ... -
Changes in ground deformation prior to and following a large urban landslide in la Paz, Bolivia, revealed by advanced InSAR
(Journal article; Peer reviewed, 2019)We characterize and compare creep preceding and following the complex 2011 Pampahasi landslide (∼40 Mm3±50 %) in the city of La Paz, Bolivia, using spaceborne radar interferometry (InSAR) that combines displacement records ... -
Characterisation of alteration zones in the Skogestad- and Stabben area in the Tellnes deposit - With focus on mineralogic content, types and degree of alteration
(Master thesis, 2021)Tellnes forekomsten regnes som en av de største ilmenitt forekomstene i verden. Forekomsten ble oppdaget ved aeromagnetiske undersøkelser støttet av Titania AS i 1954, og forekomsten har blitt utvunnet av Titania AS siden ... -
Characterisation of Mineralised Material from the Loki’s Castle Hydrothermal Vent on the Mohn’s Ridge
(Journal article; Peer reviewed, 2018)Loki’s Castle on the Arctic Mid-Ocean Ridge (AMOR) is an area of possible seafloor massive sulphide (SMS)-style mineralisation under Norwegian jurisdiction, which, due to mounting social pressure, may be a strategic future ... -
Characterisation of pyroxene and olivine in the Tellnes deposit
(Master thesis, 2020)Tellnesforekomsten er en av verdens største ilmenittforekomster. Forekomsten ble oppdaget ved flymagnetometriske målinger i 1954 og har vært i kontinuerlig drift av Titania AS siden 1960. Titania produserer et ilmenittrikt ...