Blar i Institutt for geovitenskap og petroleum på dokumenttype "Peer reviewed"
Viser treff 1-20 av 606
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1.80–1.75 Ga granite suites in the west Troms Basement Complex, northern Norway: Palaeoproterozoic magma emplacement during advancing accretionary orogeny, from field observations
(Peer reviewed; Journal article, 2022)The Ersfjord Granite is part of a suite of c.1.80–1.75 Ga syeno-granites in the West Troms Basement Complex, northern Norway, presumed to belong to the Transscandinavian Igneous Belt (TIB-1) in the Fennoscandian Shield. ... -
36Cl terrestrial cosmogenic nuclide dating suggests Late Pleistocene to Early Holocene mass movements on the south face of Aconcagua mountain and in the Las Cuevas–Horcones valleys, Central Andes, Argentina
(Journal article; Peer reviewed, 2014)The morphology, sedimentology and mineralogy of deposits that previously had been associated with glacial advances (the Penitentes, Horcones and Almacenes drifts) were reinvestigated and dated using the terrestrial cosmogenic ... -
3D in-Situ Stress Model of Upper Tamakoshi Hydroelectric Project Area
(Journal article; Peer reviewed, 2017)Reliable estimation of in-situ stress state is very important in implementing the shotcrete lined/unlined tunnels and shafts. The in-situ stress state of the area of concern is mainly governed by the gravityinduced stress, ... -
3D interpretation of helicopter-borne frequency-domain electromagnetic (HEM) data from Ramså Basin and adjacent areas at Andøya, Norway
(Peer reviewed; Journal article, 2020)The Ramså Basin is situated on the strandflat on the northeastern side of Andøya between Ramså and Skarstein. It is the only known Mesozoic sedimentary basin onshore Norway and therefore represents an easily accessible ... -
3D Joint Inversion of Scanning Magnetic Microscopy Data
(Journal article; Peer reviewed, 2021)Scanning magnetic microscopy (SMM) is a modern magnetometry technique that maps the magnetic anomalies resulting from small-scale variations of remanent magnetization within a sample. This information is vital to understand ... -
3D seismic interpretation of the depositional morphology of the Middle to Late Triassic fluvial system in Eastern Hammerfest Basin, Barents Sea
(Journal article; Peer reviewed, 2015)Integration of seismic, well and outcrop analog data provided realistic definition of the depositional morphology of the Snadd Formation in the Eastern Hammerfest Basin, Barents Sea. In this work the morphology of the ... -
A comprehensive investigation on the performance of durian rind as a lost circulation material in water based drilling mud
(Journal article; Peer reviewed, 2018)Oil and gas operators worldwide are expecting service companies to deliver integrated techniques to minimize, if not prevent, drilling problems. Drilling fluids perform vital functions to ensure the success of drilling ... -
A dynamic analysis of in-situ stress state at the Upper Tamakoshi Hydroelectric Project area
(Journal article; Peer reviewed, 2018)The in-situ stress condition in the rock mass is influenced by both tectonic and geological environment such as faulting and shearing in the rock mass. This influence is of considerable magnitude in the Himalayan region ... -
A flexural isostasy model for the Pleistocene evolution of the Barents Sea bathymetry
(Journal article; Peer reviewed, 2017)The topographic relief of the Barents Sea was subjected to major changes during the past 1.5 million years mostly due to sediment redistribution driven by glacial activity. This paper addresses the problem of Pleistocene ... -
A low frequency deghosting method: Analysis and numerical tests
(Journal article; Peer reviewed, 2017)The low-frequency component of seismic data can be beneficial for several reasons: improved signal penetration into the earth, enhanced resolution, and better constrained inversion results. We have developed a detailed ... -
A neural network approach for spatial variation assessment – A nepheline syenite case study
(Journal article; Peer reviewed, 2020)The present geometallurgical study shows the application of a machine-learning methodology to the prediction of material properties from the Nabbaren nepheline syenite deposit in Norway. The approach used in this study ... -
A new laboratory apparatus for the measurement of seismic dispersion under deviatoric stress conditions
(Journal article; Peer reviewed, 2016)A better understanding of seismic dispersion and attenuation of acoustic waves in rocks is important for quantitative interpretation of seismic data, as well as for relating seismic data, sonic-log data, and ultrasonic ... -
A novel model-based scheme for kick and loss mitigation during drilling
(Journal article; Peer reviewed, 2013)A model-based in-/out-flux detection scheme for managed pressure drilling is presented. We apply a globally exponentially stable adaptive observer which estimates the unknown states and parameters of the hydraulic system ... -
A reduced random sampling strategy for fast robust well placement optimization
(Journal article; Peer reviewed, 2019)Model-based decision-making in oilfield development often involves hundreds of computationally demanding reservoir simulation runs. In particular, well placement optimization under uncertainty in the geologic representation ... -
A review on the performance of conventional and energy-absorbing rockbolts
(Journal article; Peer reviewed, 2014)This is a review paper on the performances of both conventional and energy-absorbing rockbolts manifested in laboratory tests. Characteristic parameters such as ultimate load, displacement and energy absorption are reported, ... -
A Simple Analytical Approach to Simulate Underbalanced-drilling in Naturally Fractured Reservoirs - The Effect of Short Overbalanced Conditions and Time Effect
(Journal article; Peer reviewed, 2010)This paper describes an analytical approach to investigate the nature of short overbalanced conditions and time effects during underbalanced drilling (UBD) in a naturally fractured reservoir. This study uses an analytical ... -
A study of water chemistry extends the benefits of using silica-based nanoparticles on enhanced oil recovery.
(Journal article; Peer reviewed, 2015)Chemistry of the injected water has been investigated as an important parameter to improve/enhance oil recovery (IOR/EOR). Numerous extensive experiments have observed that water chemistry, such as ionic composition and ... -
A3Mark: Seismic attribute benchmarking
(Journal article; Peer reviewed, 2018)Seismic attribute computation is one of the most active research and engineering topics in the computational geophysics world. Although numerous algorithms for seismic attribute computation have been developed, relatively ... -
Acid treatment as a way to reduce shale rock mechanical strength and to create a material prone to the formation of permanent well barrier
(Peer reviewed; Journal article, 2021)Utilization of natural shale formations for the creation of annular barriers in oil and gas wells is currently discussed as a mean of simplifying cumbersome plugging and abandonment procedures. Shales that are likely to ... -
Acoustic generation of underwater cavities - Comparing modeled and measured acoustic signals generated by seismic air gun arrays
(Journal article; Peer reviewed, 2017)Underwater vapor cavities can be generated by acoustic stimulation. When the acoustic signals from several air guns are reflected from the sea surface, the pressure drop at some locations is sufficient for cavity growth ...