Blar i Institutt for geovitenskap og petroleum på dokumenttype "Journal article"
Viser treff 141-160 av 635
-
Development of bismuth-based solutions for well plugging and abandonment: A review
(Journal article; Peer reviewed, 2024)Plugging and abandonment (P&A) is a crucial step of the well life cycle. Regardless of how long one stretches the productive life of a well, P&A operations will have to be carried out eventually. The current panorama of ... -
Development of ECO-UHPC utilizing gold mine tailings as quartz sand alternative
(Peer reviewed; Journal article, 2021)To ensure ultra-high performance, in terms strength and durability, coarse aggregate is typically avoided in UHPC (ultra-high performance concrete). Instead, very fine quartz sand is usually used as the only aggregate. ... -
Development of safety envelopes and subsea traffic rules for autonomous remotely operated vehicles
(Journal article; Peer reviewed, 2019)This article presents the process used to develop safety envelopes and subsea traffic rules for autonomous remotely operated vehicles (AROVs) used in subsea inspection, maintenance, and repair (IMR) operations. Preventing ... -
Diagnosing Root Causes and Generating Graphical Explanations by Integrating Temporal Causal Reasoning and CBR
(Journal article; Peer reviewed, 2017)This study proposes a methodology to diagnose the root causes of failures in the domain of oil well drilling. The idea is to combine a Bayesian network, which is generated based on an expert knowledge, with situation-specific ... -
Differential evolution for early-phase offshore oilfield design considering uncertainties in initial oil-in-place and well productivity
(Peer reviewed; Journal article, 2021)During the early phases of offshore oil field development, field planners must decide upon general design features such as the required number of wells and maximum oil processing capacity (field plateau rate), usually by ... -
Dipole and Nondipole Evolution of the Historical Geomagnetic Field From Instrumental, Archeomagnetic, and Volcanic Data
(Peer reviewed; Journal article, 2021)Although a large number of magnetic declination and inclination measurements are available for the historical period from 1400 to 1900 CE, even the evolution of the axial dipole moment, the most prominent quantity of the ... -
Discovery of distinct lithosphere-asthenosphere boundary and the Gutenberg discontinuity in the Atlantic Ocean
(Peer reviewed; Journal article, 2022)The plate tectonic theory requires a rigid lithosphere floating over a weak asthenosphere, separated by the lithosphere-asthenosphere boundary, which has been sometimes interpreted as the Gutenberg discontinuity. Using a ... -
Discussions on rockburst and dynamic ground support in deep mines
(Peer reviewed; Journal article, 2019)The paper is a summary of discussions on four topics in rockburst and dynamic ground support. Topic1 is the mechanisms of rockburst. Rockburst events are classified into two categories in accordancewith the triggering ... -
Dispersion of Benthic Plumes in Deep-Sea Mining: What Lessons Can Be Learned From Dredging?
(Journal article; Peer reviewed, 2022) -
Distributed acoustic sensing of ocean-bottom seismo-acoustics and distant storms: A case study from Svalbard, Norway
(Peer reviewed; Journal article, 2023)Distributed acoustic sensing (DAS) leverages an ocean-bottom telecommunication fiber-optic cable into a densely sampled array of strain sensors. We demonstrate DAS applications to passive acoustic monitoring (PAM) through ... -
Disturbance Rejection by Feedback Control in Offshore Drilling: Experimental Results
(Journal article; Peer reviewed, 2014)As oil exploration and development costs rise, the oil industry increases its efforts to improve oil recovery (IOR) from existing fields. IOR is achieved mainly by drilling more wells, but drilling in partially depleted ... -
Dither signals optimization in constrained multi-agent extremum seeking control
(Peer reviewed; Journal article, 2021)In this paper we consider the problem of optimization of a multi-agent system with constraints through perturbations-based extremum seeking control. We demonstrate that for such systems, effects of dither signals applied ... -
Diving-wave time-lapse delay for CO2 thin layer detection
(Peer reviewed; Journal article, 2024)We have derived an analytical approximate expression to estimate the delay in diving seismic waves due to thin layers of CO2. The expression is valid for high frequencies and can be used to estimate the delay in diving ... -
Do Various Respirator Models Fit the Workers in the Norwegian Smelting Industry?
(Journal article; Peer reviewed, 2019)Background Respirator fit testing is a method to assess if the respirator provides an adequate face seal for the worker. Methods Workers from four Norwegian smelters were invited to participate in the study, and 701 ... -
Downhole failures revealed through ontology engineering
(Peer reviewed; Journal article, 2020)Frequency of failures occurring during offshore oil-well drilling do not diminish over time, probably due to increased operational complexity. The volume and frequency of information generated during the drilling process ... -
Drainage Potential Curves of Single Tapping Point for Bulk Oil–Water Separation in Pipe
(Peer reviewed; Journal article, 2022)In this study, experimental quantification of drainage potential curves for unspiked and spiked Exxsol D60 was performed and compared against simplified numerical model results. This potential relates to the flow rate of ... -
Drilling in Karstified Carbonates: Early Risk Detection Technique
(Peer reviewed; Journal article, 2020)Heterogeneous nature and complex rock properties of carbonate reservoirs makes the drilling process challenging. One of these challenges is uncontrolled mud loss. Caves or a system of cavities could be a high-risk zone for ... -
Drone-based magnetic and multispectral surveys to develop a 3D model for mineral exploration at Qullissat, Disko Island, Greenland
(Peer reviewed; Journal article, 2022)Mineral exploration in the West Greenland flood basalt province is attractive because of its resemblance to the magmatic sulfide-rich deposit in the Russian Norilsk region, but it is challenged by rugged topography and ... -
Dynamic Process Modeling of Topside Systems for Evaluating Power Consumption and Possibilities of Using Wind Power
(Peer reviewed; Journal article, 2022)Norwegian offshore wind farms may be able to supply power to offshore oil and gas platforms in the near future thanks to the expeditious development of offshore wind technology. This would result in a reduction in CO2 ... -
Dynamic wettability alteration for combined low salinity brine injection and surfactant flooding on silica surface
(Peer reviewed; Journal article, 2020)Experimental results of dynamic contact angle measurements of low salinity brine and combined low salinity water and surfactant flooding (LSW–SF) on silica surface are presented in this study. Dynamic contact angle experiments ...