ATP Oil & Gas has set new industry records in subsea well intervention by working over two production gas wells in 2,950 ft (900 m) of water and approximately 9,000 ft downhole without a riser.
Offshore staff
THE WOODLANDS, Texas -- ATP Oil & Gas has set new industry records in subsea well intervention by working over two production gas wells in 2,950 ft (900 m) of water and approximately 9,000 ft downhole without a riser.
Blue Ocean Technologies’ Interchangeable Riserless Intervention System (IRIS) completed riserless wireline runs, deploying a variety of intervention tools, including a wireline tractor, gauges, milling tools, perforating guns, and a logging tool multiple times. Each run represents a new industry record for riserless intervention, the company says. This is the first time that wireline has been successfully run in open water at 2,950 ft (900 m) depth.
The final riserless intervention operation deployed perforating guns to enable the commingling of the 3750 ms B & C Sands in Mississippi Canyon well 4ST1. After commingling the two reservoirs between 11,400 ft (3,474 m) MD and 11,900 ft (3,627 ft) MD, production increased to 9 MMcf/d and 4900 b/d of oil with a flowing tubing pressure in excess of 3100 psi.
This campaign was completed using the dynamically positioned HOS Iron Horse.
