ABSTRACT
The Claymore field has been developed with a single 36-slot integrated platform. Wells drilled from the platform are deviated up to 70° to reach reservoirs in the Lower Cretaceous Sands, the Upper Jurassic Claymore Sands, the Zechstein Limestones and Dolomites and the Carboniferous Sands. Produced fluids from the reservoirs vary considerably in PVT properties, but are all of the low-GOR type.
Gaslift was selected as the artificial-lift system for the field and compressors were installed with a total throughput of 200 MMSCF/D at a discharge pressure of 1,600 psig.
Wells are typically completed with 5-1/2" plastic-coated, premium threaded tubing equipped with side-pocket gaslift mandrels. The gaslift design and mandrel spacing are based on 12,000 BF/D with a 50% watercut using up to 10 MSCF/D of gaslift gas. Because of the high gas rates needed, dual-valve stations (two mandrels one joint apart) are used. Fig. 1 shows such a well completion.