Sonatrach

About: Sonatrach is a company organization based out in Algiers, Algeria. It is known for research contribution in the topics: Hydraulic fracturing & Structural basin. The organization has 460 authors who have published 494 publications receiving 6339 citations. The organization is also known as: Sonatrach SPA.

Etude de faisabilité de la liquéfaction du gaz naturel via la réfrigération magnétique

Abstract: Le present travail porte sur l’etude de faisabilite d’appliquer la technique de refrigeration magnetique (RM) a la liquefaction du gaz naturel (c’est-a-dire, liquefacteur magnetique). Il s’agit de modeliser le phenomene de la refrigeration magnetique, de proposer un prototype de liquefacteur magnetique et d’evaluer les performances du systeme. Un tel dispositif consiste essentiellement en un regenerateur magnetique, un fluide caloporteur et une source de champ magnetique. La premiere partie du travail portait sur la modelisation du phenomene de RM a travers l’etude d’un cycle thermomagnetique en considerant les equations d’energie gouvernant les echanges de chaleur entre le fluide et le solide dans le regenerateur magnetique. La deuxieme partie a ete consacree a l’analyse de performance et au dimensionnement du liquefacteur magnetique. A cet effet, a l’aide du logiciel de simulation Hysys, de nombreuses configurations du liquefacteur magnetique ont ete proposees et etudiees, et ce, afin de determiner les configurations optimales susceptibles de produire d’appreciables quantites de gaz naturel liquefie (GNL). Des configurations hautement efficaces ont ete trouvees; des performances ayant des valeurs jusqu’a 81% de celle du cycle de Carnot correspondant. Toutefois, en comparaison avec des liquefacteurs conventionnels a gaz, les debits de GNL trouves sont limites; des valeurs inferieures a 4.85 kg/jour obtenues sous des hautes pressions d’operation du gaz naturel (de l’ordre 36 bars) et pour un champ magnetique applique de 5 T.

Comprehensive Model for Flow Behavior of High-Performance Fracture Completions

Abstract: This paper (SPE 124431) was accepted for presentation at the 2009 SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, USA, 4–7 October 2009, and revised for publication. Original manuscript received 31 July 2009. Revised manuscript received 22 April 2010. Paper peer approved 28 June 10. Summary Experience shows that high-performance fractures (HPFs) may retain near-unit-flow efficiency (equivalent to zero skin in a vertical well) and rarely fail, even in highly deviated wells. This may be partly because overly simplistic models of the well flow behavior lead operators to maintain wells at lower production rates than could have been achieved for the same amount of injected proppant with a vertical-well-completion design. Rigorous models that account for widely accepted rock-mechanics fundamentals indicate that the fracture-to-well connection is compromised in deviated wells and lead to questions concerning whether the bulk of the flow to the well actually passes through the fracture. Distributed volumetric sources are used in this model to rigorously model a wide variety of possible fracture geometries such as an expanded wellbore because of halo effect, flow strictly through the fracture, and combined flow through a single fracture and to remaining flowing perforations not connected to the fracture. The model also includes turbulent-flow effects that may occur for radial-flow conditions in the fracture plane or in the reservoir opposite wellbore sections not connected to the fracture, along with high-velocity flow through the perforation tunnels. It also computes the effective flow area at the resulting face between the reservoir and the completion to check whether flow velocity exceeds conditions that would risk production of reservoir fines, and it estimates the screen-flow velocity on the basis of the number of flowing perforations. This comprehensive view of the HPF completion enables a thorough analysis of the risks of flowing the well at high rate. Field examples show that the new model depicts real field conditions in calculating the total skin, flow fractions, and the flux for HPF completions in high-rate gas and oil wells. Complete inflow-performance behavior for likely flow patterns for HPF wells in oil and gas reservoirs is provided.

Evolution of Burn Accidents in a Hydrocarbons Complex: Sonatrach 1985–1990

Abstract: Sonatrach is a national company for the exploitation, production, transport, liquefaction and marketing of hydrocarbons, with a work force of 32 628, > 100 work sites. Work groups contain 6 people while > 3600 people are located at industrial sites. The company is geographically distributed in 48 wilayate (departments) covering 2 380 000 km2, of which about three-quarters are desert.