etudes préliminaires à la gazéification souterraine profonde des charbons. perspectives et problèmes preliminary research on the deep underground gasification of coal. outlook and problems
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ID: 176084
2006
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Abstract
Après création dans une couche de charbon d'une communication entre deux forages, la gazéification in situ vise à réaliser l'extraction de l'énergie du charbon grâce au soutirage par l'un des puits de gaz combustible résultant de la combinaison du charbon en place avec les réactifs gazeux injectés par l'autre puits. Si une méthode de mise en communication des forages peut être découverte pour des couches de charbon profondes (plus de 800 m) il restera à déterminer comment conduire l'opération de gazéification et à évaluer la quantité de gaz, susceptible de méthanation, récupérable, dans un gisement donné, par un doublet de forages ; cette quantité gouverne en effet l'intérêt économique de l'opération. Un recensement des couches de charbon situées en France au delà de 800 m de profondeur, d'épaisseur au moins égale à 2 m et que rien n'empêche actuellement de considérer comme utilisables pour le procédé fournit une estimation totale, avec pondération suivant l'incertitude, de 2 milliards de tonnes. L'ampleur de ces ressources incite sur le plan français à s'efforcer d'établir si le procédé de gazéification souterraine permet leur récupération à un coût acceptable. Sur le plan mondial l'enjeu est, bien entendu, encore plus considérable.
After a communication has been created between two boreholes in a Goal bed, insitu gasification is a way of trying to extract the energy contained tn the coal by with-drowing, via one of the wells, the combustible gas resulting from the combination of the Goal in place with gaseous reactants injected via the other well. If a method con be discovered for creating a communication betwen boreholes for deep Goal beds (deeper than 800 m), a method will still have ta be discovered for carrying out the gasification operation and for evaluating the amount of gas available for methanationthot is recoverable in a given deposit via a pair of boreholes. This amount effectively governs the economic feasibility of the operation. A survey of carbon beds in France located at depths greater than 800 m and at least 2 m thick, and which nothing now prevents from being considered as usable for the process, gives on overall estimate of 2 billion tons, with weighting according ta the degree of uncertainty. From the French standpoint, the size of these resources is an encouragement to determine whether the underground gasification process will enable them ta be recovered at an acceptable cost. From the worldwide stanpoint, the stokes are, of course, much greater.
After a communication has been created between two boreholes in a Goal bed, insitu gasification is a way of trying to extract the energy contained tn the coal by with-drowing, via one of the wells, the combustible gas resulting from the combination of the Goal in place with gaseous reactants injected via the other well. If a method con be discovered for creating a communication betwen boreholes for deep Goal beds (deeper than 800 m), a method will still have ta be discovered for carrying out the gasification operation and for evaluating the amount of gas available for methanationthot is recoverable in a given deposit via a pair of boreholes. This amount effectively governs the economic feasibility of the operation. A survey of carbon beds in France located at depths greater than 800 m and at least 2 m thick, and which nothing now prevents from being considered as usable for the process, gives on overall estimate of 2 billion tons, with weighting according ta the degree of uncertainty. From the French standpoint, the size of these resources is an encouragement to determine whether the underground gasification process will enable them ta be recovered at an acceptable cost. From the worldwide stanpoint, the stokes are, of course, much greater.
| Reference Key |
m.2006oiletudes
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| Authors | ;Pottier M.;Chaumet P.;Lechevin L. |
| Journal | addiction (abingdon, england) |
| Year | 2006 |
| DOI |
10.2516/ogst:1978034
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