Browsing NTNU Open by Author "Holt, Rune Martin"
Now showing items 21-40 of 64
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Experimental study of seismic dispersion: Influence of clay mineral content
Mews, Kim Sarah; Lozovyi, Serhii; Stenebråten, Jørn; Giger, Silvio B.; Holt, Rune Martin (Journal article; Peer reviewed, 2023)We conducted an extensive study on the elastic properties of Opalinus Clay and the overlying and underlying rock formations, which range in the overall clay mineral content from nearly 0 wt.% to 60 wt.%. Our laboratory ... -
Experimental Study of Stress Dependent P-and S-wave Velocities in Both Dry and Saturated Sand
Qadar, Kaleem (Master thesis, 2014)Vp/Vs ratio is known as lithological and fluid prediction method as well as key part of AVO analysis. This diploma thesis is based on the based on the theoretical and mainly experimental studies to evaluate the behavior ... -
Formation of a shale barrier using numerical and analytical methods
Skomedal, Øyvind (Master thesis, 2016)The petroleum industry is looking for less expensive solutions regarding Plug & Abandonment. Earlier studies have shown incidents that shale formation around a well sometimes deforms and establishes sufficient seal around ... -
Fracture Assessment of Quasi-brittle Rock Simulated by Modified Discrete Element Method
Gheibi, Sohrab; Holt, Rune Martin (Journal article; Peer reviewed, 2020)New developments of an in-house hybrid code, named Modified Discrete Element Method (MDEM) are presented in the paper. The new developments are on the treatment of pre-existing and propagating fractures in quasi-brittle ... -
Frequency-dependent wave velocities in sediments and sedimentary rocks
Rørheim, Stian (Doctoral theses at NTNU;2022:52, Doctoral thesis, 2022) -
Frequency-dependent wave velocities in sediments and sedimentary rocks: Laboratory measurements and evidences
Bauer, Andreas; Bhuiyan, Mohammad Hossain; Fjær, Erling; Holt, Rune Martin; Lozovyi, Serhii; Pohl, Mathias; Szewczyk, Dawid (Journal article; Peer reviewed, 2016)The pioneering work of Mike Batzle and his colleagues has provided a fundamental understanding of mechanisms behind dispersion and attenuation of elastic waves in fluid-saturated rocks. It also has made way for a realization ... -
Geomechanical modelling of subsidence and induced seismicity in a gas reservoir
Kartveit, Kyrre Heldal (Master thesis, 2015)Reservoir compaction and associated surface subsidence, fault reactivation and induced earthquakes are observed in many petroleum fields worldwide. A better understanding of the geomechanical behaviour of reservoir rocks ... -
Geomechanics and Rock Physics of Anisotropic Overburden Shales
Duda, Marcin Ireneusz (Doctoral theses at NTNU;2023:326, Doctoral thesis, 2023)Shales, with their diverse composition and complex properties, present an interesting research subject and a challenging material to work with. As they constitute a significant portion of the overburden in most currently ... -
Hydraulic Fracturing for Enhanced Geothermal Systems
Rongved, Mats (Master thesis, 2015)Finding new energy sources to provide base load electricity supply on a global scale is of increasing importance. Enhanced Geothermal Systems (EGS) has been identified as capable of playing an important role in the future ... -
The Impact of Shale Anisotropic Strength and Stiffness on Borehole Stability
Nsemwa, Godwin (Master thesis, 2015)ABSTRACT Borehole instabilities is an expensive problem for the petroleum industry and most of the time, problems occur in shale. Shale is an anisotropic rock but most often it is assumed to be isotropic during borehole ... -
The Influence of Elastic Anisotropy on Borehole Stability
Røsvik, Anders (Master thesis, 2016)This thesis investigates the effect of elastic anisotropy on borehole stability, with the purpose of determining how significant this effect is. How this anisotropy affects borehole stresses and borehole failure through ... -
Influence of subsurface injection on time-lapse seismic: laboratory studies at seismic and ultrasonic frequencies
Szewczyk, Dawid; Holt, Rune Martin; Bauer, Andreas (Journal article; Peer reviewed, 2018)Seismic monitoring of reservoir and overburden performance during subsurface CO2 storage plays a key role in ensuring efficiency and safety. Proper interpretation of monitoring data requires knowledge about the rock physical ... -
Integrating Laboratory Data in a Rock Physics Model to Characterise the Effects of Exhumation on P-wave Velocities
Torset, Sondre (Master thesis, 2018)Rocks have memory. The characteristics measured by seismic, wireline or in laboratory tests on cores depend on the history that brought the rock to its current state. The burial history is also a controlling factor on ... -
Integrating rock physics laboratory data and modelling to improve uplift characterization methodology
Torset, Sondre; Holt, Rune Martin; Duffaut, Kenneth (Peer reviewed; Journal article, 2020)Modelling changes in elastic wave velocities in sediments and rocks as they undergo burial and uplift can reveal aspects of their burial history. This has implications in the petroleum risking procedures, as aspects such ... -
Laboratory Measurements of Strength Parameters for Fracturing
Walle, Lars Erik; Stroisz, Anna Magdalena; Brevik, Niklas Øystad; Jensen, Stina Stokmo; Holt, Rune Martin (Chapter, 2017)Fracture toughness and tensile strength are rock parameters that have influence on hydraulic fracture initiation and propagation, and that to various degrees are implemented in fracture modeling tools. Laboratory measurements ... -
Laboratory Testing to Study Initiation and Evolution of Shale Barriers
Austbø, Lars Erik (Master thesis, 2016)Clay and shale formations occur naturally with sealing properties, and are therefore investigated as possible annular barriers. The properties of these argillaceous rocks are not fully understood with regards to creep of ... -
Numerical analysis of mixed-mode rupture propagation of faults in reservoir-caprock system in CO2 storage
Gheibi, Sohrab; Vilarrasa, Victor; Holt, Rune Martin (Journal article, 2018)Injection-induced seismicity and caprock integrity are among the most important concerns in CO2 storage operations. Understanding and minimizing fault/fracture reactivation in the first place, and rupture growth/propagation ... -
Numerical modelling of Bingham fluid flow and particle transport in a rough-walled fracture
Hanssen, Alexander Rikstad (Master thesis, 2013)Drilling operations may encounter mud loss which becomes especially aggravated in naturally fractured formations. The dynamics of fluid loss is a complex process, affected by both the rheology and the composition of the ... -
Numerical Simulation of Fracture Geomechanics: Geothermal, CCS and Petroleum applications
Rongved, Mats (Doctoral theses at NTNU;2019:370, Doctoral thesis, 2019) -
Oedometer Tests for Assessing Possible Impact of Fluid-Shale Interactions on a Shale Barrier Formation
Brun-Lie, Celine Marie Knudtzon (Master thesis, 2017)The focus of the research for this thesis was shale as a barrier. A hole must be permanently plugged and abandoned (PP\&A) at the end of a its lifetime. Regulations require that the annulus is properly sealed off so that ...