Oil & Gas Science and Technology

https://ogst.ifpenergiesnouvelles.fr/

List of Papers (Total 654)

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...

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...

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...

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...

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...

Fault Permeability and Strength Evolution Related to Fracturing and Healing Episodic Processes (Years to Millennia): the Role of Pressure Solution

It is well known that fluids flow through faults and fractures but it is also demonstrated that fault zones act as impermeable barriers. Consequently, one must consider that faults are successively open and closed paths for fluids. On the human-activity time scale (years to millennia), studies of the seismic cycle offer the possibility of making a model of such evolution...

Reconstruction of Petroleum Feedstocks by Entropy Maximization. Application to FCC Gasolines

In the petroleum industry, the oil fractions are usually complex mixtures containing several hundreds up to several millions of different chemical species. For this reason, even the most powerful analytical tools do not allow to separate and to identify all the species that are present. Hence, petroleum fractions are currently characterized either by using average macroscopic...

Diesel Lean NOx-Trap Thermal Aging and Performance Evolution Characterization

The work described in this paper focuses on the impact of thermal aging on NOx trap structure and functions. They were evaluated on a Synthetic Gas Bench (SGB) and correlated with the analysis of the structural and chemical evolution of the catalyst. A FTIR Operando study allowed to further analyse the mechanisms occurring on the catalyst surface and highlight the most critical...

Analytical Solutions and Optimization of the Exo-Irreversible Schmidt Cycle with Imperfect Regeneration for the 3 Classical Types of Stirling Engine

The “old” Stirling engine is one of the most promising multi-heat source engines for the future. Simple and realistic basic models are useful to aid in optimizing a preliminary engine configuration. In addition to new proper analytical solutions for regeneration that dramatically reduce computing time, this study of the Schmidt-Stirling engine cycle is carried out from an...

History Matching of Production and 4D Seismic Data: Application to the Girassol Field, Offshore Angola

Time-lapse seismic provides a source of valuable information about the evolution in space and time of the distribution of hydrocarbons inside reservoirs. Seismic monitoring improves our understanding of production mechanisms and makes it possible to optimize the recovery of hydrocarbons. Although 4D seismic data are increasingly used by oil companies, they are often qualitative...

Advanced Integrated Workflows for Incorporating Both Production and 4D Seismic-Related Data into Reservoir Models

Reservoir models are used for predicting future oil recovery or for evaluating alternative field management scenarios. They can be considered as reliable when they account for all available data collected on the field: data are split into static data such as logs or measurements carried out on cores extracted from wells and dynamic data such as pressures and flow rates. Since the...

Geology and Petroleum Systems of the Offshore Benin Basin (Benin)

This paper summarizes the tectonosedimentary development and petroleum system of the Offshore Benin Basin (OBB). In accordance with structural development, the stratigraphic succession of this basin was divided into 4 sequences: pre-rift (up to Late Jurassic); rift (Neocomian to Lower Cretaceous); transitional (Cenomanian to Santonian) and post-rift (Maastrichtian-Holocene...

Compositional Description of Three-Phase Flow Model in a Gas-Lifted Well with High Water-Cut

Gas-lift technique is part of a long-term production sustainability solution in oil fields amid increasing water cuts and depleting reservoir energy. A three-phase compositional model describing the continuous gas-lift process for an operational oilfield experiencing high water-cut is developed. Field data with different water-cut values was considered to compare a three-phase...

Development of Asymmetric Hydrogenation Catalysts via High Throughput Experimentation

The dynamics of drugs discovery imposes severe time constraints on the development chemist in charge of implementing the large scale production of a new Active Pharmaceutical Ingredient (API). This results in the use of well-established and robust transformations at the expense of the cost-efficiency and the sustainability of the process. In order to cope with the short...

Integration of an Informatics System in a High Throughput Experimentation. Description of a Global Framework Illustrated Through Several Examples

High Throughput Experimentation (HTE) is a rapidly expanding field. However, the productivity gains obtained via the synthesis or parallel testing of catalysts may be lost due to poor data management (numerous manual inputs, information difficult to access, etc.). A global framework has then been developed. It includes the HTE pilot plants in the global information system. It...