Blar i UiS Brage på forfatter "Skadsem, Hans Joakim"
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A Review of Sustained Casing Pressure in Offshore Wells - Mechanisms, Diagnosis and Remediation
Langelo, Even (Bachelor thesis, 2021)Sustained casing pressure (SCP) has in the later years received increased attention. SCP is the result of gas migration through failed or degraded well barriers manifesting at the wellhead as annular pressures that cannot ... -
An experimental research of Newtonian fluids inan annular Heavy-Over-Light fluid displacement
Bratten, Sveinung Huglen (Bachelor thesis, 2021)During the construction of a well, casings are considered essential for the wellintegrity. The job of securing the casing in place, i.e. the primary cementingof the casing, is a challenging task in itself due to the vast ... -
An Experimental Study of Fluid Displacements and Effects of Inner Pipe Vibration in an Eccentric and Vertical Annulus
Leknes, Magnus (Master thesis, 2021)Well abandonment operations can be expensive and time consuming, and thousands of wells will need to be permanently plugged and abandoned off the coast of Norway in the coming years. One potential cost-cutting measure ... -
An Experimental Study of Vibration Assisted Displacement in a Horizontal Annulus for Enabling Through Tubing Abandonment
Fredheim, Fiona Øijordsbakken (Master thesis, 2021)Traditionally, Permanent Plug and Abandonment (PP&A) operations has been carried out by pulling casing and tubing using either Mobil Offshore Drilling Unit (MODU) or Fixed Platform Drilling (FPD). The costs can run up to ... -
An Experimental Study of “Heavy over Light” Density-Unstable Displacement of Newtonian Fluids in a Vertical Annular Geometry of Interest to Reverse Circulation Cementing
Bjørlo, Sjur Haugen (Master thesis, 2021)When an oil well is constructed it is important to cement the casing in place.The cement’s main objectives is to support the casing and ensure zonal isola-tion to prevent leakage of reservoir fluids to the surface. Primary ... -
Cement properties characterization from a section retrieved from an oil production well after 33 years of downhole exposure
Beltran Jimenez, Katherine; Gardner, Dave; Kragset, Steinar; Gebremariam, Kidane Fanta; Reales, Oscar A. M.; Minde, Mona Wetrhus; Lourenco de Souza, Marcelo I.; Aasen, Jan Aage; Skadsem, Hans Joakim; Delabroy, Laurent (Peer reviewed; Journal article, 2021)A unique data set has been constructed based on the study of class G cement recovered from an oil well on the Norwegian continental shelf. The cement was placed between two casing sections and submitted to downhole conditions ... -
Challenges associated with mercury occurrence on the Norwegian Continental Shelf
Ryningen, Gro (Master thesis, 2023)The thesis includes a review of the heavy metal mercury, with focus on its origin, effect on the environment, and its role in the petroleum industry. Mercury emissions from the petroleum industry in Norway is looked into ... -
Characterization of Annular Cement Permeability of a Logged Well Section Using Pressure-Pulse Decay Measurements
Skadsem, Hans Joakim (Peer reviewed; Journal article, 2022)The cement behind casings is an important barrier element in wells that should provide zonal isolation along the well. The hardened cement does not always isolate permeable formations, either due to placement issues or ... -
Computational fluid dynamics simulation of buoyant mixing of miscible fluids in a tilted tube
Ghorbani, Maryam; Giljarhus, Knut Erik Teigen; Skadsem, Hans Joakim; Time, Rune Wiggo (Peer reviewed; Journal article, 2021)Buoyancy-driven flows and mixing of fluids with different densities occur frequently both in nature and as part of industrial processes within chemical and petroleum engineering. This work investigates the buoyant exchange ... -
Concentric cylinder viscometer flows of Herschel-Bulkley fluids
Skadsem, Hans Joakim; Saasen, Arild (Peer reviewed; Journal article, 2019)Drilling fluids and well cements are example non-Newtonian fluids that are used for geothermal and petroleum well construction. Measurement of the non-Newtonian fluid viscosities are normally performed using a concentric ... -
Development of a novel experimental technique for the measurement of residual wall layer thickness in water-oil displacement flows
Zhang, Yao; Barrouillet, Benjamin; Chavan, Sachin Maruti; Skadsem, Hans Joakim (Peer reviewed; Journal article, 2023)The effective removal and displacement of fluids is important in many industrial and environmental applications, such as for operation and cleaning of process equipment, fluid injection in porous media for oil recovery or ... -
Effect of buoyancy and inertia on viscoplastic fluid-fluid displacements in a regular and an irregular eccentric annulus
Skadsem, Hans Joakim; Kragset, Steinar (Peer reviewed; Journal article, 2020-09)Casing strings and liners are important subsurface structural components in petroleum and in geothermal wells. After the casing string has been run in hole, it is cemented to the formation by pumping a sequence of spacer ... -
The effect of PVA microfiber reinforcement on the mechanical and rheological behavior of class G oil well cement pastes
Nogueira Lima, Victor; Skadsem, Hans Joakim; Beltrán-Jiménez, Katherine; Velloso, Raquel Quadros; Silva, Flávio de Andrade (Peer reviewed; Journal article, 2023)During the life cycle of an oil well, the annular cement sheath will be exposed to load combinations that can result in failure. To enhance the structural integrity and ductility of the cement paste, and to improve the ... -
Effect of scaling and mixing procedure on cement slurry and hardened cement
Søyland, Heidi (Master thesis, 2022) -
Effects of confinement pressure on the mechanical behavior of an oil well cement paste
Lima, Victor Nogueira; Silva, Flavio de Andrade; Skadsem, Hans Joakim; Beltran Jimenez, Katherine; Sunde, Jonas Kristoffer (Peer reviewed; Journal article, 2021-11)Oil well cement paste is a key structural component in wells that should provide mechanical support to the casing and prevent uncontrolled flow of formation fluids along the wellbore and to the environment. Since the annular ... -
Experimental investigation of laminar and turbulent displacement of residual oil film
Zhang, Yaozhi; Barrouillet, Benjamin; Skadsem, Hans Joakim (Peer reviewed; Journal article, 2023-11)Residual oil films on pipe walls are a common occurrence in industrial processes, and their presence can significantly impact system efficiency and performance. However, the mechanisms that govern oil film removal by an ... -
An Experimental Study of the Enhanced Mass Transfer Process by CO2 Absorption for Carbon Storage in Saline Aquifers
Hansen, Tamara (Masteroppgave/UIS-TN-IEP/2020;, Master thesis, 2020-07-21)Diffusion of CO2 into water-based solutions generate an instability at the interface as a result of density differences. The rate of dissolution, the final saturation pressure and the mixing regime caused by convection ... -
Fluid Migration Characterization of Full-scale Annulus Cement Sections Using Pressure-Pulse-Decay Measurements
Skadsem, Hans Joakim (Peer reviewed; Journal article, 2021)Fluid migration behind casings is a well integrity problem that can result in sustained casing pressure, undetected leaks to the environment, and potentially very challenging remediation attempts. Understanding the geometric ... -
Forstå og håndtere utfordringer knyttet til sandkontroll for utvinning av olje
Skaugen, Magnus (Bachelor thesis, 2023)In the petroleum industry, sand production is a prominent technical and economic challenge that may lead to severe implications such as well abandonment and casing erosion. This challenge is particularly pronounced in ... -
Influence of fluid viscosity hierarchy on the reverse-circulation displacement efficiency
Ghorbani, Maryam; Giljarhus, Knut Erik Teigen; Skadsem, Hans Joakim (Peer reviewed; Journal article, 2023)Reverse-circulation cementing is an alternative strategy for well cementing where the cementing fluids are injected directly into the annulus from the surface. This cementing strategy can reduce downhole circulation pressures ...