Blar i NTNU Open på forfatter "Landrø, Martin"
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Source Signature Estimation Based on Recordings in Deep-Towed Streamers Below the Source
Helgebostad, Kristian Svarva (Master thesis, 2017)Source-over-spread acquisition design is a recent development in marine seismic acquisition, aiming to improve imaging of the shallow subsurface. Contrary to conventional towed-streamer acquisition, source-over-spread ... -
Source-Depth Diversity for Enhanced Marine Seismic Imaging
Haavik, Kjetil Eik (Doctoral theses at NTNU;2016:319, Doctoral thesis, 2016) -
Spatial Variation in the Overburden R Factor at the Ekofisk Field from 4D Seismic Analysis and Geomechanical Modelling
Skadberg, Marie Wik (Master thesis, 2017)4D seismic analysis of the overburden is essential in well planning and risk analysis. The dilation factor (R) links the changes in velocities and thicknesses causing time shifts. The focus of this thesis has been determination ... -
Streamer depth versus vessel and seismic interference noise
Dao, Toan; Landrø, Martin (Journal article; Peer reviewed, 2017) -
Time lapse seismic analysis of the Tohoku-Oki 2011 earthquake
Landrø, Martin; Kodaira, Shuichi; Fujiwara, toshiya; No, Tetsuo; Weibull, Wiktor Waldemar; Arntsen, Børge (Journal article, 2019)A detailed time lapse seismic analysis of subsurface movements is presented using seismic 2D lines acquired prior to and after the Tohoku-Oki earthquake offshore Japan in 2011. Estimated movements of the seabed from the ... -
Time-Frequency Fused Underwater Acoustic Source Localization Based on Contrastive Predictive Coding
Zhu, Xiaoyu; Dong, Hefeng; Salvo Rossi, Pierluigi; Landrø, Martin (Peer reviewed; Journal article, 2022)We propose a time-frequency fused underwater acoustic source localization method based on self-supervised learning with contrastive predictive coding. Firstly, two feature extractors are trained to solve the pretext task ... -
Time-Lapse 3D CSEM for Reservoir Monitoring Based on Rock Physics Simulation of the Wisting Oil Field Offshore Norway
Ettayebi, Mohammed; Wang, Shunguo; Landrø, Martin (Peer reviewed; Journal article, 2023)The marine controlled-source electromagnetic (CSEM) method has been used in different applications, such as oil and gas reservoir exploration, groundwater investigation, seawater intrusion studies and deep-sea mineral ... -
Time-Lapse Refraction Analysis Monitoring Shallow Gas Migration - 2/4-14 Blowout, A North Sea Case Study
Løhre, Nora Løw (Master thesis, 2018)In January 1989, the drilling of well 2/4-14 situated in the North Sea took a dramatic turn of events when encountering a high-pressure zone. The well kicked and the situation eventually developed into an underground ... -
Time-lapse Seismic Analysis of the Tohoku Earthquake
Kristensen, Eivind (Master thesis, 2017)A time lapse seismic comparison of subsurface movements before and after the 2011 Tohoku earthquake is presented in this report. In order to successfully conduct this comparison, an entire processing sequence from raw data ... -
Tube-wave monitoring as a method to detect shear modulus changes around boreholes: A case study
Wehner, Daniel; Borges, Filipe; Landrø, Martin (Peer reviewed; Journal article, 2021)Monitoring the shear modulus of formations around boreholes is of interest for various applications, ranging from near-surface investigation to reservoir monitoring. Downhole logging tools and borehole seismic are common ... -
Tuning Effect on Near and Far Offset Stacks: Mapping the Thickness Beneath Seismic Resolution of a Shallow Thin Layer in Block 2/4.
Eidissen, Kjersti (Master thesis, 2014)Analysis of high-amplitude anomalies (bright spots) are the most used basic method of identifying hydrocarbon accumulations in seismic signals. When this method is applied to thin-bedded strata, the result can be misleading. ... -
Underwater Source Localization and Geoacoustic Inversion based on Machine Learning
Zhu, Xiaoyu (Doctoral theses at NTNU;2023:246, Doctoral thesis, 2023)Marine environmental information is vital for marine engineering applications. Underwater acoustic remote sensing is a common approach to obtaining marine environmental information by acoustic waves. With the development ... -
Variable source depth acquisition for improved marine broadband seismic data
Haavik, Kjetil Eik; Landrø, Martin (Journal article; Peer reviewed, 2015-05)In marine seismic data acquisition, varying the source depth along a sail line gives diversity in sequential shot gather frequency spectra. Undesired alterations of the frequency spectra are created by the source ghost and ...