Blar i Vitenskapelige publikasjoner (TN-IPT) på tittel
Viser treff 12-31 av 33
-
Gas Hydrate Growth Kinetics: A Parametric Study
(Journal article; Peer reviewed, 2016-12)Abstract: Gas hydrate growth kinetics was studied at a pressure of 90 bars to investigate the effect of temperature, initial water content, stirring rate, and reactor size in stirred semi-batch autoclave reactors. The ... -
Genuine two-phase flow dynamics with a free interface separating gas-liquid mixture from gas
(Journal article; Peer reviewed, 2013)This paper deals with a two-phase compressible gas-liquid model relevant for modeling of gas-kick flow scenarios in oil wells. To make the model more realistic we include a natural pressure-dependent well-formation ... -
Global weak solutions for a compressible gas-liquid model with well-formation interaction
(Journal article; Peer reviewed, 2011-10)Abstract. The objective of this work is to explore a compressible gas-liquid model designed for modeling of well °ow processes. We build into the model well-reservoir interaction by allowing °ow of gas between well and ... -
Global weak solutions for a gas liquid model with external forces and general pressure law
(Journal article; Peer reviewed, 2011)In this work we show existence of global weak solutions for a two-phase gas-liquid model where the gas phase is represented by a general isothermal pressure law, whereas the liquid is assumed to be incompressible. To make ... -
How stress and temperature conditions affect rock-fluid chemistry and mechanical deformation
(Journal article; Peer reviewed, 2016-03)We report the results from a series of chalk flow-through-compaction experiments performed at three effective stresses (0.5, 3.5, and 12.3MPa) and two temperatures (92 and 130◦C). The results show that both stress and ... -
Incorporating electrostatic effects into the effective stress relation — Insights from chalk experiments
(Journal article; Peer reviewed, 2018-01)Which forces are responsible for holding highly porous chalks together? We use the effective stress to quantify the electrostatic effects around particle contacts originating from the adsorption of ions onto charged mineral ... -
Mechanical and physical behavior of high-porosity chalks exposed to chemical perturbation
(Journal article; Peer reviewed, 2015-09)Extensive study on the effect of dissolution–precipitation on mechanical behavior of various high-porosity outcrop chalks (Liége, Aalborg, Kansas, Stevns Klint, and Mons) flooded with simplified aqueous chemistry at 130 ... -
Metallic nanoparticles for enhanced heavy oil recovery: promises and challenges
(Journal article; Peer reviewed, 2015)With the increasing global energy demand, great attention has been focused on utilizing heavy oil and bitumen, which are potentially located ultra-deep underground and cannot be easily recovered. Numerous recovery approaches ... -
Numerical treatment of two-phase flow in capillary heterogeneous porous media by finite-volume approximations
(Journal article; Peer reviewed, 2012)This paper examines two-phase flow in porous media with heterogeneous capillary pressure functions. This problem has received very little attention in the literature, and constitutes a challenge for numerical discretization, ... -
Porosity and permeability development in compacting chalks during flooding of nonequilibrium brines: Insights from long-term experiment
(Journal article; Peer reviewed, 2015-05)We report the complete chemical alteration of a Liège outcrop chalk core resulting from a 1072 flow-through experiment performed during mechanical compaction at 130°C. Chemical rock-fluid interactions alter the volumetric ... -
Rate of penetration optimization using moving horizon estimation
(Journal article; Peer reviewed, 2016)Increase of drilling safety and reduction of drilling operation costs, especially improvement of drilling efficiency, are two important considerations in the oil and gas industry. The rate of penetration (ROP, alternatively ... -
Reduction of the effective shear viscosity in polymer solutions due to crossflow migration in microchannels: Effective viscosity models based on DPD simulations
(Journal article, 2017-03)Molecular dynamics simulations (dissipative particle dynamics–DPD) were developed and used to quantify wall-normal migration of polymer chains in microchannel Poseuille flow. Crossflow migration due to viscous interaction ... -
Repeated post-Caledonian intra-cratonic rifting in the central North Sea: Evidence from the volcanic record in the Embla oil field
(Journal article; Peer reviewed, 2017-11)Intrusive and extrusive mafic igneous rocks in the Embla oil field, central North Sea, testify to repeated post-Caledonian magmatism on the northern flank of the Mid North Sea High. The igneous rocks are highly clay- and ... -
Role of Seepage Forces on Seismicity Triggering
(Journal article; Peer reviewed, 2010-11)Borehole fluid injection is commonly used for geological sequestration of carbon dioxide, underground storage of natural gas, waste injections, and during stimulations and development of geothermal and hydrocarbon reservoirs. ... -
“Smart water” as a wettability modifier in chalk: The effect of salinity and ionic composition
(Doctoral thesis; Journal article; Peer reviewed, 2010)Seawater can improve the water wetness of chalk at high temperatures, which improves the oil displacement by spontaneous imbibition of water. It is experimentally verified that the interaction between Ca2+, Mg2+, and SO42− ... -
Structural evolution of Pico del Águila anticline (External Sierras, southern Pyrenees) derived from sandbox, numerical and 3D structural modelling techniques
(Journal article; Peer reviewed, 2013-03)This paper reports on the integration of different modelling techniques to construct a unified conceptual model of structural evolution of the Pico del Águila anticline (External Sierras, southern Pyrenees, Spain). The ... -
The Effect Of MoS2 -And Graphene Nanoparticles On The Properties & Performance Of Polymer /Salt Treated Bentonite
(Journal article; Peer reviewed, 2017)Among others, properly designed drilling fluid is a key for a success of drilling operation. The rheology, and lubricity of drilling fluids control the hydraulics, hole cleaning and the mechanical friction between string ... -
The Effect Of Titanium Nitride(TiN) Nanoparticle On The Properties & Performance Bentonite Drilling Fluid
(Journal article; Peer reviewed, 2017)In recent years, the application of nano technology is attracting the oil and gas industry. Nanomaterials research results show an improving result of cement, drilling fluid and Enhanced Oil Recovery. In this paper, the ... -
The performance of a heat pump using nanofluid (R22+TiO2) as the working fluid – an experimental study
(Journal article; Peer reviewed, 2015)It has been well known that the nano-particles, including metals, oxides, carbides, or carbon nanotubes, can increase the conduction and convection coefficients and consequently, enhance the heat transfer. Using nanofluids ... -
Water-based enhanced oil recovery (EOR) by “Smart Water”: optimal ionic composition for EOR in carbonates
(Journal article; Peer reviewed; Doctoral thesis, 2011)The composition of the injecting brine has a profound effect on the efficiency of water-based enhanced oil recovery (EOR) methods. Recently, we observed that not only is the concentration of the active ions Ca2+, Mg2+, ...