Publications

Kalimantan in Indonesia and they are to come on stream on 17 November 2008. Lying 25 kilometers from the Mahakam Delta in 60 to 90 meters of water, the two fields are located in the Totaloperated Mahakam and Tengah blocks. This first phase of development of the Sisi-Nubi includes the installation of three wellhead platforms, a reception facility, and a sub-sea pipeline gathering network, all completed on schedule and within budget. Both fields are characterized by multiple layers of poorly consolidated sands, and tight gas in the deeper interval. The 27 development wells to be drilled to complete phase 1 require advanced drilling techniques to optimize both gas recuperation using best fitted completion and the DRILLEX thanks to technical breakthroughs and controlled usage of SIMOPS with both tender rig and jack up drilling units. The paper will go through the lessons learned and challenges encountered throughout the drilling and completion preparation and operations: 3 dimensional trajectories due to the multitarget reservoirs Hostile environment with shallow gas presence down to 500mTVD plus discontinuous and fractured carbonates between 1700 and 2000mTVD where strong to total losses are anticipated Use of 42 splitter wellheads combined with tubing-less completion and hydraulic fracturing use of 6 zones single trip multi-zone gravel pack and expandable screen over 1000 m of reservoir clean-up operations performed while drilling and producing Start-up of a new build jack up and new build stimulation barge. Management of the change of drilling contractor on one of the rigs during the start-up of the drilling operations.