Planning and Executing Long Distance Subsea Tie-Back Oil Well Testing: Lessons Learned

Three subsea oil wells in a water depth ranging between 5200<br>and 5400 ft in the Gulf of Mexico are tied back to a Tension<br>Leg Platform via a flowline network of a single 2.3 miles<br>pipe-in-pipe connected to a 17 miles dual active-heating<br>flowline. During normal operation these wells flow to a<br>common separator at the topsides. Production allocation to<br>each well is done by subtracting the topsides separator<br>measurement by the subsea multiphase flow meter reading<br>dedicated to one of the wells and manually splitted between<br>the other two wells.