Oil & Gas Science and Technology

https://ogst.ifpenergiesnouvelles.fr/

List of Papers (Total 756)

Influence of the Crude Oil Characterization on Mmp Calculation

This paper focuses on the influence of the crude oil characterization on minimum miscibility pressure (MMP) calculation. It is shown what kind of compounds may be lumped together in order to calculate the MMP with a good accuracy. In a first step, a selected crude oil is modeled with 37 pure compounds using the characterization procedure developed by Avaullée et al. (1997a) in...

Fluid Sampling under Adverse Conditions

Valid samples are essential to the proper description of reservoir fluids; if the samples are not representative, all measurements on them will be invalid. This paper discusses the principal challenges facing fluid sampling including gas condensate reservoirs, compositional gradients, water content of hydrocarbon fluids, asphaltene deposition, wax formation, oil base mud...

Multiphase, Multicomponent Fluid Flow in Homogeneous and Heterogeneous Porous Media

The flow of several components and several phases through a porous medium is generally described by introducing macroscopic mass-balance equations under the form of generalized dispersion equations. This model raises several questions that are discussed in this paper on the basis of results obtained from the volume averaging method, coupled with pore-scale simulations of the...

Permeability Damage Due to Asphaltene Deposition : Experimental and Modeling Aspects

The flow properties of several asphaltenic crudes were studied at reservoir temperature in rocks of different morphology and mineralogy. The experiments performed showed a progressive reduction in permeability to oil during injection, varying in rate according to the system considered. The existence of organic deposits was verified by Rock-Evalpyrolysis measurements made on...

Quantitative Surface Analysis by Xps (X-Ray Photoelectron Spectroscopy): Application to Hydrotreating Catalysts

XPS is an ideal technique to provide the chemical composition of the extreme surface of solid materials, vastly applied to the study of catalysts. In this article, we will show that a quantitative approach, based upon fundamental expression of the XPS signal, has enabled us to obtain a consistent set of response factors for the elements of the periodic table. In-depth spadework...

Production froide des huiles visqueuses. Première partie : Observations sur champ

La production froide de certains réservoirs contenant des huiles visqueuses, au Canada et au Venezuela principalement, amène à des productivités et des taux de récupération supérieurs aux prédictions calculées à l'aide des équations habituellement utilisées pour décrire les écoulements classiques. Pour expliquer ces productions anormalement élevées, un certain nombre de m...

Theoretical Interpretation of Residence-Time Distribution Measurements in Industrial Processes

The Residence-Time Distribution (RTD) is a chemical engineering concept introduced by Danckwerts in 1953. It has been described in a multitude of scientific papers and applied for various industrial processes. The development of Computer Fluid Dynamics will improve the comprehension and optimisation of such processes. However, this approach remains difficult in case of complex...

Mathematical Modelling of the Permeation of Gases in Polymers

In this work, we focus on the experiments of permeation in order to characterise the transport coefficients and how they depend on the gas concentration. First, a physical and mathematical modelling approach is presented. Two models are used in order to describe the diffusion of gases in polymers. The mathematical modelling leads thereafter to the construction of an unusual...

Développement d'un modèle de durabilité de poutres composites unidirectionnelles renforcées par des fibres de verre

Les interactions entre le vieillissement humide de composites unidirectionnels verre/époxy et leur tenue en fatigue par flexion sont ici abordées dans le cadre d'un modèle de durabilité fondé sur des notions de corrosion sous contrainte. L'étude est focalisée sur les stades initiaux de l'endommagement par fatigue, qui sont caractérisés par l'accumulation diffuse, à l'échelle...

Calculation of Stresses and Slips in Helical Layers of Dynamically Bent Flexible Pipes

This paper deals with stress and displacement calculation in dynamically bent unbounded flexible pipes. The presented method is original in that movements and stresses of all helical layers are coupled. Good correlation between strain measurements and the theory has been found, and is shown in the paper.Cet article présente une méthode de détermination des contraintes et des d...

Subsidence Delay: Field Observations and Analysis

Boutéca, M.J., Sarda, J.P. and Schneider, F. (1996) Subsidence Induced by the Production of Fluids. Revue de l'Institut français du pétrole, 51, 3, 349-379 Abstract - Subsidence Delay: Field Observations and Analysis - The objective of this paper is to describe the subsidence-depletion delay from field observations with the aim to explain its cause and constrain its modelling...

Energy Conservation and CO2 Emissions in the Processing and Use of Oil and Gas

By the year 2020 or so, oil and gas, which contribute currently to 62% of the whole of carbon dioxide anthropogenic emissions, will go on to cover roughly half of the world demand of primary energy. Thence, the fight against the CO2 emissions requires the implementation of preventive actions as regards processing (refining of crude oil and natural gas) and uses (combustion in...

Gasoline and Diesel Oil Biodegradation

Fuels are major organic pollutants of soils and ground waters. Persistency of pollutants in the environment depends on the intrinsic biodegradability of constituting hydrocarbons of fuels, on the presence of active microflorae at the polluted areas and on local environmental factors. The intrinsic biodegradability of fuels such as gasoline or diesel oil was determined by using a...

A New Method for Normalization of Capillary Pressure Curves

A new method for normalization of capillary pressure data of a reservoir was developed that incorporates the effects of pore geometry (pore size distribution index and flow zone indicator index), lithology index and irreducible water saturation. The hydraulic flow unit's approach was used to classify the reservoir formation into constant pore geometry units. The Leverett J...

Kinematic and Petroleum Modeling of the Alberta Foothills and Adjacent Forelant - West of Calgary

This paper summarizes the main results of an integrated study using surface and subsurface geological data and IFP's basin modeling tools along a regional transect crossing the Alberta foothills and adjacent foreland between Banff and Calgary. Cretaceous subsidence history in the foreland and subsequent erosional profiles in both the autochthon and the allochthon were computed...

Rheological and Flow Properties of Gas Hydrate Suspensions

The problem of hydrate blockage of pipelines in offshore production is becoming more and more severe with the increase of the water depth. Conventional prevention techniques like insulation or methanol injection are reaching their limits. Injection of antiagglomerant additives and/or presence of natural surfactants in crude oils give us a new insight into hydrate prevention...

Experimental Study of the Pipeline Lubrication for Heavy Oil Transport

Heavy oil is accessible in different areas around the world in large amount. Unfortunately its high viscosity makes it difficult to produce and to transport. In this article we focus on transport problems. Pressure drop in the pipes must be lower as possible to limit pump power and to be able to transport in long distance. In the case of heavy oil, the high viscosity leads to...

Intracrystalline Diffusion in Zeolites Studied by Neutron Scattering Techniques

Neutron scattering techniques can be used to study the different motions of molecules adsorbed in zeolites: vibrations, rotations and translation. Using combined instruments, it is now possible to measure diffusivities ranging from 10-7 to 10-14 m2s-1. Furthermore, incoherent scattering, using hydrogenated molecules, allows to determine the self-diffusivity; while coherent...

Synchrotron FTIR Hydrocarbon Fluid Inclusion Microanalysis Applied to Diagenetic History and Fluid Flow Reconstruction in Reservoir Appraisal

In sandstones, siliceous diagenetic overgrowths may commonly contain several generations of hydrocarbon fluid inclusions (FI's), generally of size no more than 10 µ. We successfully analyzed such inclusions in North sea sandstones from the Dunbar area, subthrusted reservoirs such as sub-Andean basins (Venezuelian and Colombian foothills) and carbonaceous series in areas of...

3D Quantification of Pore Scale Geometrical Changes Using Synchrotron Computed

Synchrotron microtomography is a non-destructive 3D-characterisation technique providing a three-dimensional mapping of µ, the linear X-ray absorption coefficient of the material under investigation. At each voxel (volume element in 3D images, by analogy to pixel, picture element in 2D) the value of µ is the average of the absorption coefficients of the different solids and...

ATES Contribution to the Housing Energy Balance: a Simple Assessment Methodology

The reduction of Green-House Gas Emissions (GHGE) goes through a sum of solutions that need to be tuned to the local context in terms of energy needs and resources, and also to the demand and offer variations with time. The housing heat consumption is particularly concerned as it is seasonal and rarely in phase with the deliverability of alternative or renewable energy sources...

Oxygen Carriers for Chemical Looping Combustion - 4 000 h of Operational Experience

Chemical Looping Combustion (CLC) is a new combustion technology with inherent separation of the greenhouse gas CO2. The technology involves the use of a metal oxide as an oxygen carrier which transfers oxygen from combustion air to the fuel, and hence a direct contact between air and fuel is avoided. Two interconnected fluidized beds, a fuel reactor and an air reactor, are used...

Experimental Investigation of the Asphaltene Deposition Process during Different Production Schemes

This paper presents the results of asphaltene precipitation and deposition during lean gas injection, CO2 injection and natural depletion in reservoir conditions. In addition, the effect of variations in operating pressure, injection gas concentration and production rate on asphaltene precipitation and deposition were investigated. The severity of asphaltene deposition was found...