Oil explorer Emerald Energy said cumulative gross oil production from its Khurbet East field in Syria recently reached 4m barrels.Drilling operations have been completed at the Khurbet East No. 12 delineation well, and preliminary analysis of core and wire-line logs indicates approximately 10 metres of net reservoir, extending down to 1,605 metresInitial flow testing at Khurbet East No. 11 well has also been completed. The well flowed oil of approximately 25 degrees API (American Petroleum Institute) at an average rate over a 44 hour period of around 1,660 barrels per day, under natural flow and through a 48/64' choke, with a water cut of approximately 30%.The Yousefieh No.1 well, drilled in November 2008, was re-entered in August 2009, and remedial cementing operations on the production liner were successfully completed.During subsequent flow testing operations the well flowed oil of approximately 25 degrees API to surface at an average rate of approximately 356 barrels per day over a 7 hour period, under natural flow and through a 48/64 inch choke, with an average water cut of less than 1%.The Yousefieh No.2 well, drilled in February 2009, was re-entered in August 2009 and produced 17 degrees API oil to surface at an average rate of 139 barrels per day over a 12 hour period, under artificial lift using nitrogen and through a 2 inch choke, with a water cut of 49%.Emerald’s chief executive Angus MacAskill declared himself happy with the test results and added ‘we look forward to the results of flow testing at the Khurbet East No.12 well and the results of the upcoming Yousefieh No.3 appraisal well.’