WZ6-12-A7 exploration well

Australia-based Roc Oil, a wholly-owned subsidiary of ROC, has made a new oil discovery in the WZ6-12-A7 exploration well, offshore of China.

The well has reached a total depth of 2,658m in the Liushagang formation and encountered 10.4m of net oil pay in the Weizhou formation, associated with the Sliver prospect.

The well also encountered 79m of net water wet sands with oil shows in the underlying Liushagang formation with up-dip potential remaining.

Roc Oil said it has gathered oil samples and pressure data to determine the extent of the oil column in the well.

A production liner is being run to enable future completion and tie-in for production.

WZ6-12-A7, drilled by the HYSY 931 drilling rig located over the WZ6-12 wellhead platform, is a deviated step-out exploration well.

Designed to test the Sliver fault segment and the Liushagang footwall exploration prospects, this well is the third one making up the three-well exploration programme within the WZ6-12 and WZ12-8 West Oil Field Development areas.

"Roc Oil has gathered oil samples and pressure data to determine the extent of the oil column in the well."

ROC CEO Alan Linn said the new discovery represents the working relationship the company has with its joint venture partners, CNOOC and COSL1.

"This will also ensure the efficient integration of the discoveries into the overall development plan, delivering incremental reserves and additional production to the project," Linn added.

Plans are underway to integrate new exploration discoveries results into the current Beibu Development Project for a further rearrangement of the development wells.

Beibu production facilities have been designed with flexibility to produce the new oil zones, found during the exploration drilling programme, the comapany said.

Roc Oil holds a 40% stake as operator of the Beibu Gulf exploration programme, while its partners, Horizon Oil (Beibu) holds 30%, Horizon Oil (Nanhai) accounts for 25% and Oil Australia owns the remaining five percent.


Image: Roc Oil has made a new oil discovery in the WZ6-12-A7 exploration well, offshore of China. Photo courtesy of ROC.