Publications

VICO Indonesia is an oil and gas producer in East Kalimantan, Indonesia. It operates the Sanga Sanga Production Sharing Contract (PSC) which has been on production since 1972. The PSC comprises of 7 fields, over 600 wells, 4 main gathering centers and 600 miles of pipeline. Low Pressure (LP) compression systems have steadily been introduced and now every field has a Very Low Pressure (VLP) compression capacity (~15psig suction). Most of the well is very mature with a significant proportion of remaining reserves are in depleted zones.Most of VICOs existing production wells is subject to liquid loading that leading to premature abandonment of producing zones. This condition is mainly influenced by tubing size, surface pressure and the amount of associated liquids being produced along with the gas.The primary objective of deliquification techniques that are currently available either focus on changing the tubing size (such as velocity strings) or reducing pressure at the wellhead (such as venting, wellhead compression and vacuum compression) or assisting the lifting of liquids (foaming agents, plungers, pumps, & gas lift) or some combination of the above is to lower abandonment pressure to increase recovery. VICO has introduced deliquification techniques with low cost and low technique solutions as temporary solution.In early 2006 two new deliquification techniques (capillary string chemical injection and plunger lift) have been successfully applied in VICO and brought some liquid loaded wells back on production. In this paper the capillary string chemical injection and the plunger lift pilot tests are presented.