Having brought about production at exceptionally low costs with cash operating costs around $15 per barrel throughout the year, Royal Dutch Shell plc (ADR) (NYSE:RDS.A) is expected to post a commendable cash flow growth in the long cycle. With West Texas Intermediate and Brent crude currently above $50 per barrel, the Anglo Dutch company is likely to benefit. As per the estimates of market watchdogs, the oil and gas major is expected to grow its cash flow position to $25 billion in four years given that oil prices reach $60 per barrel.