Proceedings of the 6th New Zealand Geothermal Workshop 1985. Engineering aspects of the downhole gas separator. New Zealand Geothermal Workshop [7-9 Nov. 1984, New Zealand].

Hattersley, S.D.

[1984]

171
CIENA

0-86869-056-2

Placement of a full size downhole gas separator (DHS) in a geothermal well is not considered a too highly complicated engineering exercise. The majority of problems and inconvenience occur later when the system is running and when well maintenance is required. The preferred system is when the separator is fixed in the casing and the tubing carrying the extracted gas is allowed to expand through a gland at the well-head. All considered options of placing the separator precluded the use of downhole measurement instruments and more importantly monitoring of deposition build-up in the production zone. At the time of writing no clear evidence was available to determine the exact level of deposition in any one well nor what affect the separator itself had on the level of deposition. The estimate for placing the DHS in 1984 was $182200, the cost of removal $80000 and the cost of replacement $140000. An annual workover to remove calcite aboave and below the DHS, which would include replacement, was expected to cost $297000 without the cost of a new DHS.

Presenta diagrs.

NUEVA ZELANDIA; ENERGIA GEOTERMICA; SEPARADOR DE GASES; DHS; POZOS GEOTERMICOS; INGENIERIA GEOTERMICA; COSTOS; EQUIPO;