Browsing by Author "Frodyma, Antoni"

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Access status: Open Access ,
Metody perforacji kumulacyjnej w udostępnianiu złóż węglowodorów
(2007) Frodyma, Antoni; Wilk, Zenon
Perforation using shaped charges, as a method of deposit development in oil and gas mining is, in practice, the only commonly used method of obtaining hydraulic interconnection of cased borehole and productive reservoir layer. The study presents historical outline of cumulative perforation and development of basic techniques in this domain. It discusses various conveyance methods - wireline, production tubing (TCP) and coiled tubing (CT), through tubing perforation (TTP), as well as methods of ignition depending on job technology used. Two basic carrier concepts - hollow carrier (closed type) and bar carrier (open type) are characterised, as well as sets of shooting means (detonating cords, shaped charges, detonation initiators) that can be purposefully used with them. The basic requirements, that should be fulfilled by shaped charges depending on main task of perforation (horizon opening, preparation for intensification job - fracturing, for example, as well as special jobs - i.e. restoring of lost circulation with perforator - puncher) has also been presented. In context of this review, currently used and approved sets of shooting equipment and means for cumulative perforation are presented, including some new approaches, such as technology of reactive liners and perfo-generators.
Access status: Open Access ,
Zabieg perforacji otworu wiertniczego jako czynnik oddziałujący na wielkość skin-efektu
(2008) Habera, Łukasz; Frodyma, Antoni
The perforation of wellbore casing is essential to allow the reservoir fluid inflow to the wellbore and further up to the surface. The perforation job employing high-energy material, results, however, in decreasing the permeability factor in the near-wellbore zone, which negatively influences productivity/injection ability of the wellbore. General set of factors determining permeability depletion within the near-wellbore zone has been called skin-effect. In this study the authors will give a closer look into the skin-effect creation mechanism as a constituent induced by perforating job, as well as its influence on further wellbore operation.