V.A. MASHORIN, I.A. SAHIPOVA, E.A. UFIMTSEV, AO “NK “Kondaneft”;

K.V. BURDIN, M.A. DEMKOVICH, K.A. STARODUBTSEVA, Schlumberger

First successful heavy-tonnage multistage fracturing (MSF) with Coiled Tubing (CT) inside the well was performed in June 2018 in Russia in the Kondinskoe field. All the wells were equipped with reclosable CT fracturing sleeves and stimulated using the integrated completion service in which fracturing operations are combined with CT operations and are run with CT inside the well. This reduces operation time for MSF jobs. Five MSF wells have been successfully stimulated, with 70–100 tons of proppant per fracturing port. The reclosable fracturing sleeves and multistage packer technologies used in the Premium Ports + Jackal service enable us to optimize the fracturing process. The system comprises:

– Recolorable CT fracturing sleeves can be switched to various positions (The full-bore valve can be used in cemented wells and enables repeated opening and closing of ports);

– Open hole hydralic packers isolate zones in uncemented completions;

– ACT shifting tool (CT / tubing conveyed);

– Multistage Mechanical Packer Jackal (optional, could be used in case of inability to close one of ports). Resettable packer, could be activated in any part of liner with axial CT movements, 680 atm (10 000 psi) rated.

.....

Full version of the article can be downloaded here