Publications

Peciko is a giant multilayer gas field located in the Mahakam delta of East Kalimantan. The field is divided in three main intervals which are Shallow, Upper, and Main Zone. Main Zone reservoirs, between 2,500 and 4,000 mSS, are consolidated sandstone and not prone for sand production. On the contrary, Upper and Shallow zones are unconsolidated sandstone for which downhole sand control is required. At the early development phases, Main Zone reservoirs were the prime objectives meanwhile Shallow reservoirs encountered were considered as hazard for drilling. Development of the unconsolidated Shallow reservoirs using Gravel Pack and Open Hole Stand Alone Screens completion started in 2009, therefore all wells drilled before are not completed with proper sand control, but with standard monobore or tubingless completion. Strong depletion of Main Zone reservoirs is currently observed and Shallow reservoirs now become potential targets to fight the decline in the low producing wells. After screening of different techniques, Rig-less Sand Consolidation (SCON) has been identified as the most suitable and cost effective solution in the context of the offshore Peciko field. This paper presents a successful pilot application of the SCON technique. Candidate selection workflow is driven mainly by reserves evaluation from seismic and well correlation, and a complete well integrity review. Resin was injected on a shut-in well with no more potential in Main Zone. Appropriate logistic and safety preparations were performed prior to the Coiled Tubing operation. The pilot test yielded a gas production up to 3 MMscfd without any sand, and more than 1 Bcf of incremental reserves. This trial opens the opportunity to unlock additional resources from Shallow reservoirs and to add value to low potential wells.