[3] In April 2004, the extension area north of block 5 was included to the production sharing agreement.

[5] In May 2008, Maersk Oil drilled the world record extended reach well BD-04A in the field with the GSF Rig 127 operated by Transocean.

[6] From 2004 until August 2009 the massive supertanker, Knock Nevis, the largest ship built to date, was moored there as a floating storage and offloading unit (FSO).

[2] A development plan between Maersk Oil and QatarEnergy calls for an increase in production to 83,500 cubic metres per day (525,000 bbl/d).

This increase is expected to account for the majority of growth in Qatar's petroleum output over this time.

However, in May 2008, a new record for borehole length was established by the extended-reach drilling (ERD) well BD-04A, in the Al Shaheen oil field.

[13][14] On 28 January 2011, Exxon Neftegas Ltd., operator of the Sakhalin-I project, drilled the world's longest extended-reach well offshore on the Russian island of Sakhalin.

[15] On 27 August 2012, Exxon Neftegas Ltd beat its own record by completing the Z-44 Chayvo well.