CWD derisks Australian offshore drilling operations

摘要

Originally promoted as a cost-saving technology, CWD has emerged as the go-to technique to improve infill drilling in this mature offshore field. Originally discovered in 1993, the Stag oil field, which is on the North West Shelf of Western Australia, has produced more than 58 MMbbl since production began in 1998. The field is a shallow - 680 m (2,231 ft) subsea - highly unconsolidated and highly permeable sandstone. Reservoir depletion, unconsolidated rock, water breakthrough, and sand production have created conditions where infill drilling campaigns have become increasingly problematic in recent years.