Flow measurement - specialist NEL has increased the fiscal accuracy of oil flow measurements , by calculating flow numbers in real - time using a differential pressure flow meter . *. Although around 70 % of the world 's remaining oil reserves are classed are " heavy oil " , its flow is challenging to measure and delivers error and uncertainty that costs approximately $ 1 m per year per meter , according to BP .
Flow measurement - specialist NEL has increased the fiscal accuracy of oil flow measurements , by calculating flow numbers in real - time using a differential pressure flow meter . Although around 70 % of the world 's remaining oil reserves are classed are " heavy oil " , its flow is challenging to measure and delivers error and uncertainty that costs approximately $ 1 m per year per meter , according to BP .