| Title | DISCHARGE INITIATION BY GAS LIFTING: PNOC-EDC EXPERIENCE IN PHILIPPINE GEOTHERMAL WELLS |
|---|---|
| Authors | B. C. Buning, L. D. Gonzaga, A. R. Aqui, J. R. M. Salera, Z. F. Sariniento |
| Year | 1998 |
| Conference | Stanford Geothermal Workshop |
| Keywords | gas lift, Philippines |
| Abstract | PNOC-EDC pioneered the use of gas lifting to initiate geothermal well discharges in the Philippines in 1992. Liquid nitrogen is gassified and pumped into tlie wellbore through a coiled tubing. Tlie "lift" is achieved through tlie creation of a pressure drop between the reservoir and tlie wellbore at tlie injection point. By October 1997, a total of 28 wells have been successfully discharged by gas lifting. This involved a total of 38 attempts, with 11 failures mostly caused by equipment breakdown during injection. The paper also discusses considerations taken by PNOC-EDC in planning for and conducting a successful gas lifting operation. |