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

Key Words:

gas lift, Philippines

Conference:

Stanford Geothermal Workshop

Year:

1998

Session:

WELLBORE

Language:

English

File Size:

245KB

View File:

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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