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Browsing by Subject "coal deposits"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    The maximization of the ultimate recovery factor in mature gas reservoirs implementing wellhead and field compression
    (2008) Ştefănescu, Dan-Paul; Tătaru, Argentina; Rotar, Dumitru; Popa, Ana-Maria
    Mature fields contribute more than 50% of the world's gas production and therefore it is necessary to understand and to optimize the performance of these reservoirs. The obvious decline of the natural gas reserves associated with relatively reduced volume of the new reserves discoveries, reclaim the implementation of a new technical-economical approach of the mature gas field. The final target is in fact, the extending the life of the reservoirs, in terms of increasing the ultimate recovery factor. One of the Romgaz concepts regarding this problem is to develop compression capacities close to the wells. Many gas wells can be subjected to increased production by reducing the wellhead pressure. By installing a compressor at the wellhead or in the field, the wellhead pressure can be reduced to increase the gas production and the ultimate recovery factor. These types of compressors are characterized by low to medium throughputs with low to medium compression ratios. The implementation of this method is imposed by production behavior of the semi-depleted Romgaz fields. The biggest advantages of this type of compression are represented by the installation low costs, a low maintenance, as well as a big flexibility at the working parameters' variation.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Upgrading gas assay in Donbass
    (2008) Sorokin, Andrej I.; Martynenko, I. I.; Sorokin, I.; Gošov'skij, Sergìj Volodimirovič; Dudlâ, Mikola Andrìjovič
    In work the actual problem of improvement the quality of gas approbation of coal deposits is proved and put. The design advanced gas collector is described, that allows increasing a considerably volume and reliability of selection gas tests. Results of its use on coal deposits of Donbass are resulted.