The importance of the formation and fracture pressures for the selection of the depths for casing setting in Slovakia

• Autorzy: Pinka J. , Kucirkova L.

Identyfikatory

DOI

10.7494/drill.2015.32.2.381

• Języki publikacji: EN

Abstrakty

EN

Different oil companies place shallow casing strings at different depths. Apparently there is no general method or procedure that gives the optimal location. This article is an attempt to define this optimum casing seat location. The potential benefits will improve safety and economy of the operation. The two major factors determine the depth of the casing shoe, that is, the fracture pressure and the pore pressure. A third factor is the lithology, because it is desirable to place the casing shoe in a competent shale section. The methods of predicting fracture gradients for deeper wells already exist. In this article, a method of predicting fracture gradients for shallow well has been derived. This method is combined with kick tolerance criteria to obtain a casing depth selection method. Also, the variation in fracture pressures at any depth has been investigated.

Słowa kluczowe

EN

casing strings; fracture pressure; pore pressure; fracture gradients

• Wydawca: AGH University of Science and Technology Press
• Czasopismo: AGH Drilling, Oil, Gas
• Rocznik: 2015
• Tom: Vol. 32, no. 2
• Strony: 381--394
• Opis fizyczny: Bibliogr. 6 poz., rys., tab., wykr.

Twórcy

autor

Pinka J.

• The Technical University of Kosice, Faculty of Mining, Ecology, Process Control and Geotechnology

autor

Kucirkova L.

• The Technical University of Kosice, Faculty of Mining, Ecology, Process Control and Geotechnology

Bibliografia

• [1] Pinka J., Klempa M., Struna J.: Technika a technologie vrtnych praci. I. dil. Marionetti Press, Ostrava 2014, 1-120, ISBN: 978-80-905737-0-3.
• [2] Pinka J., Klempa M., Struna J.: Technika a technologie vrtnych praci. II. dil. Marionetti Press, Ostrava 2014, 1-254, ISBN: 978-80-905737-1-0.
• [3] Prevädzkovy predpis c. 11/2010: Zist'ovanie stiepnych unikovych tlakov vo vrte. NAFTA a.s., 2010.
• [4] Svrcek M.: Zist'ovanie a vyhodnocovanie unikovych stiepnych tlakov vposobnosti Nafta a.s. Diplomovä präca. F BERG TU Kosice, 2014.
• [5] Samudra A.B.: Fracture Pressure - Fracture Gradients. Halliburton, USA, 2011. Dostupne na internete: http://www.scribd.com/doc/55010634/Fracture-Pressure [cit. 2014.04.05].
• [6] Strniste K., Smolik S.: Hlbinne vrtanie. 1. vyd. Alfa Bratislava, Bratislava 1992, 1-336, ISBN 80-05-01031-1.