Keys to Successful Drilling in Mahanagdong

  • Manuel S. Ogena
  • Published 2003

Abstract

The Mahanagdong sector is one of the four development sectors within the Leyte Geothermal Production Field and has been developed to supply 180 MWe of steam capacity. Drilling activities in Mahanagdong began in July 1980 by dnlling the first deep well, well MG-1. To date, a total of thirty seven (37) wells have been dnlled in the area, twenty eight (28) for production and nine (9) for reinjection. The success rate of dnlling and completing deviated wells in the area to attain their geologic objectives is only 44%. The principal cause of dnlling problems in the open hole section of wells in the Mahanagdong sector is the limited ability of the loss zones to accept cuttings despite initial massive mud circulation losses leadmg to a shift to drilling with water. The volume of cuttings generated with further dnliing and wluch can not be absorbed by these loss zones eventually leads to stuck pipe and subsequent early termination of the well. A modified dnlling strategy, well design revisions and the use of the two-liner system are some of the solutions implemented which substantially improved the success rate of completing the last five wells and following the programmed design and objectives.

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Cite this paper

@inproceedings{Ogena2003KeysTS, title={Keys to Successful Drilling in Mahanagdong}, author={Manuel S. Ogena}, year={2003} }