EVALUASI KEGAGALAN CASING PADA SUMUR PANAS BUMI “AIA-1” BERDASARKAN NEW ZEALAND STANDARD DAN API 5CT

Abstract

Akhmad Izzat Abidin. 101317028. Casing failure evaluation of geothermal well “AIA-1” based on New Zealand Standard and API 5CT. This research is discussing about casing failure evaluation of geothermal “AIA-1” based on New Zealand Standard and American Petroleum Association chapter 5 about Casing & Tubing. Evaluation is addressed to determine the cause of casing failure in “AIA-1” well. Method that used in this study is make validation of casing appropriateness with calculation and provide recommendation of suitable casing design. The aspects reviewed in this study are casing depth configuration, casing ability to withstand the loads, thermal stress analysis, and casing strength due to corrosion. From the study, found that production casing failure was caused by the casing rating which was below the load and the existing corrosive level. In addition, in the section liner there is also a rating discrepancy with the existing corrosive value. The recommendation obtained after research on the “AIA-1” well is to change the Production Casing 13-3/8” class from K-55 54 lb/ft to L-80 68 lb/ft, Production Liner 10-3/4” from K-55 51 lb/ft to L-80 51 lb/ft, and Production Liner 7” from K-55 26 lb/ft to L-80 28 lb/ft with the same casing depth configuration.