The Use of Fiber-Optic Distributed Temperature Sensing and Remote Hydraulically Operated Interval Control Valves for the Management of Water Production in the Douglas Field

摘要

Unwanted water production has long been one of the biggestrnproblems that the oil and gas industry has had to address inrnefficiently producing hydrocarbons. This paper describes howrnfiber-optic-distributed temperature sensing (DTS) has beenrnused in conjunction with remotely operated hydraulic intervalrncontrol valves (ICVs) as an economical management tool forrncontrolling water encroachment. Used with intelligent wellrntechnology, this method provides interventionless control andrnselectivity of producing intervals using surface-actuatedrnhydraulic ICVs so that unwanted water production can bernmanaged more effectively to maximize oil recovery.rnDistributed temperature measurements at one-meter intervalsrnin the wellbore provide data that assists in the determinationsrnof zonal contribution and the identification in the change ofrnfluid properties or water ingress.rnThis method was installed on the Douglas Platform inrnLiverpool Bay, United Kingdom. The completion wasrncomprised of an ESP pump, hydraulic on/off disconnect,rnretrievable packers with hydraulic feed throughs and hydraulicrnICVs. An optical fiber that acquires continuous distributedrntemperature data is installed into one of the hydraulic controlrnlines that operate the hydraulic ICVs. Opto-electronicrninstrumentation on the platform allows distributed temperaturerndata to be transmitted in real-time to a shore-based asset team.rnThe combination of fiber optics and hydraulic intervalrncontrol valves provides a number of benefits:rn· The number of penetrations through tubing hangersrnand packers are reduced if requiredrn· The fiber optic sensor is capable of gathering real-timernlogging data from multiple intervals withoutrninterventionrn· The ICVs provide interventionless zonal controlrn· The disconnect system facilitates ESP workover andrnrecompletion.