| Abstract |
The Mahanagdong sector is one of the foiir development sectors within the Leyte Geothennd Prodiiction Field nnd is being developed to supply 180 MlVe ofstenw cnpncjty. Drilling nccjvities in Mahanagdong began in July 1980 b,v drilling the,first deep well, w d MG-1. -4s of December 31, 1996, n total oJ'fhir9 sir (36) wells hmv been drilled in the men, twenty seven (-771 $r prodiiction nnd nine (9) for reinjectim The siiCce-EF rote of drilling nnd couipleting deviated welk in the wen to nttnin their geologic objectives is only -12%. This paper focuses on the fnctrrs and cniism of the drilling problerns prevnlcnt in the Mahanagdong secfor. The principnl muse of drilling problems in the open hole section is the lirnifed nbiliq ofthe upper IQSS zones to nccepi mitings despite initinl r m. ~ v e id circulntion losses lending fo n ship to drilljng with wier. The volime of cuttings generated wjsh Jirther drilling and which can not be absorbed b.v ihese loss zones eventiidly /en& to stuck pipe and subsequent enrly terminntim of the well. -.$ r1100rjjSed filling sb-ntegy, well design revisions and &e use of the two-liner qcitea ore sowe of the solutions iiiiplermznted which siibstnntinlly ir>qroved lire siicces rnfe of completing the lad five wells @hn:ing the pmogrwmed design and objectives. |