Filtrer
Support
Éditeurs
Prix
-
Model choice and model aggregation
Frédéric Bertrand, Jean-Jacques Droesbeke, Gilbert Saporta, Christine Thomas-agnan
- Technip
- Statistiques
- 28 Septembre 2017
- 9782710811770
For over fourty years, choosing a statistical model thanks to data consisted in optimizing a criterion based on penalized likelihood (H. Akaike, 1973) or penalized least squares (C. Mallows, 1973). These methods are valid for predictive model choice (regression, classification) and for descriptive models (clustering, mixtures). Most of their properties are asymptotic, but a non asymptotic theory has emerged at the end of the last century (Birgé-Massart, 1997). Instead of choosing the best model among several candidates, model aggregation combines different models, often linearly, allowing better predictions. Bayesian statistics provide a useful framework for model choice and model aggregation with Bayesian Model Averaging.
In a purely predictive context and with very few assumptions, ensemble methods or meta-algorithms, such as boosting and random forests, have proven their efficiency.
This volume originates from the collaboration of high-level specialists: Christophe Biernacki (Université de Lille I), Jean-Michel Marin (Université de Montpellier), Pascal Massart (Université de Paris-Sud), Cathy Maugis-Rabusseau (INSA de Toulouse), Mathilde Mougeot (Université Paris Diderot), and Nicolas Vayatis (École Normale Supérieure de Cachan) who were all speakers at the 16th biennal workshop on advanced statistics organized by the French Statistical Society. In this book, the reader will find a synthesis of the methodologies' foundations and of recent work and applications in various fields.
The French Statistical Society (SFdS) is a non-profit organization that promotes the development of statistics, as well as a professional body for all kinds of statisticians working in public and private sectors. Founded in 1997, SFdS is the heir of the Société de Statistique de Paris, established in 1860. SFdS is a corporate member of the International Statistical Institute and a founding member of FENStatS-the Federation of European National Statistical Societies.
-
Geomechanics applied to the petroleum industry
Jean-françois Nauroy
- Technip
- 1 Août 2011
- 9782710809326
Designing an efficient drilling program is a key step for the development of an oil and/or gas field.
Variations in reservoir pressure, saturation and temperature, induced by reservoir production or CO2 injection, involve various coupled physical and chemical processes. Geomechanics, which consider all thermohydromechanical phenomena involved in rock behavior, play an important role in every operation involved in the exploitation of hydrocarbons, from drilling to production, and in CO2 geological storage operations as well.
Pressure changes in the reservoir modify the in situ stresses and induce strains, not only within the reservoir itself, but also in the entire sedimentary column. In turn, these stress variations and associated strains modify the fluids flow in the reservoir and change the wellbore stability parameters. This book offers a large overview on applications of Geomechanics to petroleum industry. It presents the fundamentals of rock mechanics, describes the methods used to characterise rocks in the laboratory and the modelling of their mechanical behaviour ; it gives elements of numerical geomechanical modelling at the site scale.
It also demonstrates the role of Geomechanics in the optimisation of drilling and production : it encompasses drillability, wellbore stability, sand production and hydraulic fracturing ; it provides the basic attainments to deal with the environmental aspects of heave or subsidence of the surface layers, CO2 sequestration and well abandonment ; and it shows how seismic monitoring and geomechanical modelling of reservoirs can help to optimise production or check cap rock integrity.
This book will be of interest to all engineers involved in oil field development and petroleum engineering students, whether drillers or producers. It aims also at providing a large range of potential users with a simple approach of a broad field of knowledge.
-
Progressing cavity pumps ; oil well production artificial lift (2e édition)
Christian Wittrisch, Henri Cholet
- Technip
- 1 Juin 2013
- 9782710809982
The Progressing Cavity Pump (PCP's), invented by René Moineau, is a great innovation for the whole industry, particularly in petroleum production.
Since 1980, Progressing Cavity Pumps have been widely used in the production of heavy oil well containing sand and gas.
The aim of this new edition is to provide clear related and condensed information about the principles of the Progressing Cavity Pump, including the use of recent material technologies to manufacture pump stators with advanced elastomers and now with metals. The same applies to the drive rods and driving head, particularly with permanent magnet motors and advanced control and well monitoring with downhole and surface sensors to control and monitor the pumping system. Data transmission and processing are improving well management and safety. Software is used to select the best pump for the well candidate. All these new technologies are worldwide applied and accepted by the market. They mean that the well production can be increased and the PCP's operating life can be extended with reduced operating costs.
This book is intended to provide the criteria for selecting a Progressing Cavity Pump and the operational conditions for its implementation by technicians and field development managers.
-
Well Production Practical Handbook