DISCHARGE INITIATION BY GAS LIFTING: PNOC-EDC EXPERIENCE IN PHILIPPINE GEOTHERMAL WELLS
- Key words
- gas lift, Philippines
- Conference
- Stanford Geothermal Workshop
- Year
- 1998
- Session
- WELLBORE
- Language
- English
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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.
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