A method of carrying out water insulation works in gas wells
UDC: 622.279.7
DOI: 10.33285/1999-6934-2023-5(137)-49-55
Authors:
OLIFIRENKO EVGENY V.
1,
MOLCHANOV OLEG A.1,
BABINA IRINA S.1
1 Gazprom dobycha Urengoy, Novy Urengoy, Russia
Keywords: waterproofing works, success of waterproofing work, geological factors for the success of WIW, gas wells, gas wells capital repair, Bolshoi Urengoy fields
Annotation:
Increasing the efficiency of water isolation works (WIW) in gas wells is a pressing issue, especially at the final stage of fields development. The Cenomanian gas reservoir of the Bolshoi Urengoy fields (BUF) has been developed since 1978. Since 2003, the traditional method of working with a watered productive formation has been the injection of water-isolating compounds (WIC) into a porous medium to plug the paths for formation water to enter a well. In 2010, the WIW method without WIC, based on key geological success factors, was developed. The method was tested in 2011–2012 in wells of the North Urengoy field and the En-Yakhinskaya area of the Urengoy field. The results of the work performed are included in the "Addition to the project for the additional development of the Cenomanian deposit of the Bolshoy Urengoy fields (Urengoy and North Urengoy oil, gas and condensate fields)" in 2013. In the Bolshoi Urengoy fields, work is constantly being carried out to improve the efficiency of VIR using a variety of technologies. In 2022, the results of WIW in adjacent wells of cluster No 1227 on the Yen-Yakhinskaya area proved the fact that in well No 12271 the repair goal was achieved at the level of geological criteria, in comparison with the neighboring well No 12272, the repair of which was carried out with an emphasis on WIW. The article presents an alternative WIW method in gas wells, taking into account geological success factors.
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