Abstract: Geothermal Well Completion and Casing Programs in Indonesia

R. Soerjo Soerjadji, A. Sumitramihardja

The design of casing and well completion programs for geothermal drilling in Indonesia are still in a preliminary stage. Very little experience was gained during exploratory drilling begun in 1974 in Java. In that program five holes were drilled in Kamojang to depths of 700 m, followed by development drilling up to 1,500 m.

Based on the lithologic results in a few shallow boreholes to 128-m depths in Kamojang and with New Zealand expertise and advise, casing programs were designed. These ranged from a combination of 13 3/8, 9 5/8, and 6 5/8-in. casing with 4½-in. perforated liner for 700-m wells, to combinations of 20, 13 3/8, and 9 5/8-in. casing and 7-in. perforated liner for the 1,500-m wells.

The wells were tested and completed with slotted liners covering the open-hole section below the production casing to prevent sloughing of the formation during discharge. No open-hole completions have been made in the wells.

Although geothermal drilling in Indonesia is in an early stage of development, data gathered from well testing will aid in exploration and development of geothermal resources in the country.

AAPG Search and Discovery Article #90962©1978 AAPG 2nd Circum-Pacific Energy and Minerals Resource Conference, Honolulu, Hawaii