Blar i NTNU Open på forfatter "Nyrnes, Erik"
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Detection of Gross Errors in Wellbore Directional Surveying for Petroleum Production with emphasis on Reliability Analyses
Nyrnes, Erik; Torkildsen, Torgeir; Nahavandchi, Hossein (Peer reviewed; Journal article, 2005)This paper presents a method for the detection of gross errors in wellbore directional survey data. The method is general, and is applicable for both magnetic and gyroscopic surveys. However, this study will only examine ... -
Positioning and position error of petroleum wells
Gjerde, Tony; Eidsvik, Jo; Nyrnes, Erik; Bruun, Bjørn (Journal article; Peer reviewed, 2011)We present a new model for the estimation of positional uncertainty of petroleum wells. The model uses a heavy tailed normal inverse Gaussian distribution for the errors in Earth's magnetic field reference values. These ... -
Statistical analysis of surface displacements – an example from the Åknes rockslide, western Norway
Nordvik, Trond; Nyrnes, Erik (Journal article; Peer reviewed, 2009)Analyses of displacement measurements may provide valuable insight into the characteristics and behaviours of landslides. This paper demonstrates the application of statistical analysis to displacement data collected ... -
Statistical Methods for Calculating the Risk of Collision Between Petroleum Wells
Loeng, Bjørn Erik (Master thesis, 2012)In this thesis we explore several statistical methods for addressing the risk of collision between two petroleum wells. Such a collision is a potentially dangerous but rare event that can occur in situations with directional ...