Publications

Regulation PTK-040 SKK MIGAS explained that the oil company must permanently close the wells post-production operations. Cluster-X has complex well conditions, so the observation needs to be cost-effective. The observation on this case refers to SNI 13-6910-2002 explaining the permanent abandonment of wells in the isolation of open-hole zones, perforation zones, blockage of casing stub (junk) as Primary well-barrier and the annular space blockage as a Secondary well-barrier. The next stage is the surface plug as an environmental isolation plug. API BUL E3-FIRST EDITION & NORSOK STANDARD D-010 are also needed for permanent abandonment on surface capping and slotted-liners in multiple reservoirs. Additional references such as API-Spec-10A are needed. The final stage is the testing of cement plugs, hole cleaning process, and budgeting. This paper discusses various conditions of wells on Cluster-X such as abnormally high pressure, cement plug with open-hole slotted-liners in multiple reservoirs, and junk left in-hole. The first step was to run with a balance plug method on ± 10,500-10,971 ft MD as Primary well-barrier. The next step was to run a cement squeeze method with bridge plug on ±7200-7500 ft MD as Secondary well-barrier. On the step of environmental isolation plug a cement plug retainer was run as a weight test with 15,000 pounds the same on previous steps. Type G class cement was selected to cement plug and ran off section milling tools above of the overpressure zone. The wells closure method compares between rigless method coiled tubing unit and portable rig (conventional) which can optimize plug & abandonment operating time and operational cost.