Stimulation program of air compression and nitrogen injection in geothermal well

Author(s): E. Budirianto, W. A. Nugroho, B. N. Jayanto, A. H. Lukmana, D. R. Ratnaningsih
Departement of Petroleum Engineering, UPN “Veteran” Yogyakarta, 55283, Indonesia
International Journal of Smart Grid and Clean Energy, vol. 9, no. 5, September 2020: pp. 855-864
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.9.5.855-864

Abstract: Non-self-discharge (non-artesian) well is one of the problems often faced in geothermal development. This problem can be identified using several methods. However, not all methods can be used because it requires data that only be obtained after a discharge test. The failure of self-discharge well is due to the presence of a water column above the main feed zone, which makes the hydrostatic pressure higher than the reservoir pressure at static conditions. Therefore, stimulation is needed to initiate the discharge of the well. There are many methods of well stimulation have been developed. This paper aims to program the stimulation of geothermal well using air compression and nitrogen injection methods with a case study on WBA well. The output parameter in air compression is the compression pressure needed to suppress the height of the water column, whereas in nitrogen injection is the amount of liquid nitrogen required to reduce the density of the water column.

Keywords: Non-artesian well, well stimulation, air compression, nitrogen injection
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