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| 1 | Impact of elliptical boreholes on in situ stress estimation from leak-off test data显示文摘We developed an inversion technique to determine in situ stresses for elliptical boreholes of arbitrary trajectory. In this approach, borehole geometry, drilling-induced fracture information, and other available leak-off test data were used to construct a mathematical model, which was in turn applied to finding the inverse of an overdetermined system of equations.The method has been demonstrated by a case study in the Appalachian Basin, USA. The calculated horizontal stresses are in reasonable agreement with the reported regional stress study of the area, although there are no field measurement data of the studied well for direct calibration. The results also indicate that 2% of axis difference in the elliptical borehole geometry can cause a 5% difference in minimum horizontal stress calculation and a 10% difference in maximum horizontal stress calculation. | Hong Xue Han Shunde Yin Bernt Sigve Aadnoy | 2018 | Petroleum Science2018，15，4： | 2 |
| 2 | Improvement of Wired Drill Pipe Data Quality via Data Validation and Reconciliation显示文摘Wired drill pipe(WDP)technology is one of the most promising data acquisition technologies in today s oil and gas industry.For the first time it allows sensors to be positioned along the drill string which enables collecting and transmitting valuable data not only from the bottom hole assembly(BHA),but also along the entire length of the wellbore to the drill floor.The technology has received industry acceptance as a viable alternative to the typical logging while drilling(LWD)method.Recently more and more WDP applications can be found in the challenging drilling environments around the world,leading to many innovations to the industry.Nevertheless most of the data acquired from WDP can be noisy and in some circumstances of very poor quality.Diverse factors contribute to the poor data quality.Most common sources include mis-calibrated sensors,sensor drifting,errors during data transmission,or some abnormal conditions in the well,etc.The challenge of improving the data quality has attracted more and more focus from many researchers during the past decade.This paper has proposed a promising solution to address such challenge by making corrections of the raw WDP data and estimating unmeasurable parameters to reveal downhole behaviors.An advanced data processing method,data validation and reconciliation(DVR)has been employed,which makes use of the redundant data from multiple WDP sensors to filter/remove the noise from the measurements and ensures the coherence of all sensors and models.Moreover it has the ability to distinguish the accurate measurements from the inaccurate ones.In addition,the data with improved quality can be used for estimating some crucial parameters in the drilling process which are unmeasurable in the first place,hence provide better model calibrations for integrated well planning and realtime operations. | Dan Sui Olha Sukhoboka Bernt Sigve Aadn?y | 2018 | International Journal of Automation and computing2018，15，5： | 2 |
| 3 | The Role of Tumor-Infiltrating Immune Cells and Chronic Inflammation at the Tumor Site on Cancer Development, Progression, and Prognosis: Emphasis on Non-small Cell Lung Cancer显示文摘 | Roy M. Bremnes Khalid Al-Shibli Tom Donnem Rafael Sirera Samer Al-Saad Sigve Andersen Helge Stenvold Carlos Camps Lill-Tove Busund | 2011 | Journal of Thoracic Oncology2011，，4： | 1 |
| 4 | The effects of personality and gender on risky driving behavior and accident involvement 显示文摘 | Sigve Ohedal Torbjm Rundmo | 2006 | Safety Science2006，44，7： | 1 |
| 5 | The Role of Tumor Stroma in Cancer Progression and Prognosis: Emphasis on Carcinoma-Associated Fibroblasts and Non-small Cell Lung Cancer显示文摘 | Roy M. Bremnes Tom D?nnem Samer Al-Saad Khalid Al-Shibli Sigve Andersen Rafael Sirera Carlos Camps Inigo Marinez Lill-Tove Busund | 2011 | Journal of Thoracic Oncology2011，，1： | 1 |
| 6 | Biosynthesis of bacteriocins in lactic acid bacteria显示文摘 | Ingolf F. Nes Dzung Bao Diep Leiv Sigve H?varstein May Bente Brurberg Vincent Eijsink Helge Holo | 1996 | Antonie van Leeuwenhoek (-)1996，，2： | 1 |
| 7 | under pair-feeding regime 显示文摘 | Sigve N Ashild K Camilla R Effects of methionine cysteine and medium chain triglycerides on nutrient digestibility absorption of amino acids along the intestinal tract and nutrient retention in Atlantic salmon Salmo salar L | 2000 | Aquaculture2000，186，： | 1 |
| 8 | Using cluster analysis to test the cultural theory of risk perception显示文摘 | Sigve Oltedal Torbjorn Rundmo | 2007 | Transportation Re- search Part F2007，，10： | 1 |
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