Narrative:

After takeoff from ZZZ; the first officer and I noticed a significant drop in oil quantity (from 15 quarts to 9 quarts) from the #2 engine; but then stabilized and I deemed it safe to continue. Throughout the flight; the #2 engine continued to lose oil quantity and I notified dispatch and maintenance when the level dropped to 6 quarts. Oil loss continued to increase at that point and we were very quickly down to 2 quarts of oil. Maintenance and dispatch recommended engine shutdown and diversion to ZZZ. We shut down the engine and diverted to ZZZ1. I declared an emergency and notified all parties of the situation. QRH follow-up and all procedures complied with. Uneventful approach and landing at ZZZ1. Passenger deplaned and another aircraft was utilized to complete flight to ZZZ2. Engine had a history of oil leakage; and an o-ring had been replaced 1 or 2 days prior.

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Original NASA ASRS Text

Title: AN AIRBUS FLIGHT CREW EXPERIENCED LOSS OF OIL PRESSURE IN CRUISE FLIGHT. THEY SHUT DOWN THE ENGINE; DECLARED AN EMERGENCY; AND DIVERTED TO THE NEAREST SUITABLE AIRPORT AFTER CONSULTING WITH DISPATCH AND MAINTENANCE.

Narrative: AFTER TKOF FROM ZZZ; THE FO AND I NOTICED A SIGNIFICANT DROP IN OIL QUANTITY (FROM 15 QUARTS TO 9 QUARTS) FROM THE #2 ENG; BUT THEN STABILIZED AND I DEEMED IT SAFE TO CONTINUE. THROUGHOUT THE FLT; THE #2 ENG CONTINUED TO LOSE OIL QUANTITY AND I NOTIFIED DISPATCH AND MAINT WHEN THE LEVEL DROPPED TO 6 QUARTS. OIL LOSS CONTINUED TO INCREASE AT THAT POINT AND WE WERE VERY QUICKLY DOWN TO 2 QUARTS OF OIL. MAINT AND DISPATCH RECOMMENDED ENG SHUTDOWN AND DIVERSION TO ZZZ. WE SHUT DOWN THE ENG AND DIVERTED TO ZZZ1. I DECLARED AN EMER AND NOTIFIED ALL PARTIES OF THE SITUATION. QRH FOLLOW-UP AND ALL PROCS COMPLIED WITH. UNEVENTFUL APCH AND LNDG AT ZZZ1. PAX DEPLANED AND ANOTHER ACFT WAS UTILIZED TO COMPLETE FLT TO ZZZ2. ENG HAD A HISTORY OF OIL LEAKAGE; AND AN O-RING HAD BEEN REPLACED 1 OR 2 DAYS PRIOR.

Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.