You are here

CNOOC-led joint venture strike oil at Beibu Block offshore China

29th September 2014

Roc Oil, a partner in the CNOOC-led joint venture, has completed drilling on the first of two exploration wells in the Beibu Gulf Block 22/12, with the WZ12-10-1 well discovering oil pay in the Jiaowei (T42) formation, while no oil pay was interpreted in the Weizhou formation

CNOOC-led joint venture strike oil at Beibu Block offshore China
Rig HYSY 935 will be moved to the WZ12-10-2 exploration location to drill the second and final well in this programme

"This oil discovery adds potentially valuable incremental oil to the Beibu project,” said Alan Linn, Roc Oil chief executive officer. “The location of the oil discovery allows Roc and the joint venture to evaluate alternative development scenarios, particularly integration with the Beibu WZ12-8E oil discovery".

The WZ12-10-1 well was drilled to a total depth of 1406-metres MD/1,373-metres TVDSS, where the Basement granite has been intersected. The well discovered oil in the very top of the Jiaowei (T42) formation over an interval of 5.5-metres, with a high porosity net oil pay of 4.2-metres.

A sidetrack (WZ12-10-1Sa) was then drilled with 340 metres eastern step out to a total depth of 1,265-metres MD/1,105-metres TVDSS to prove up the updip T42 reservoir and confirmed oil in the very top of the Jiaowei (T42) formation with a thicker net oil pay of 5.5 metres.

The well is located 4.7 kilometres northeast of the existing WZ12-8W Platform and approximately 2.7 kilometres west of the WZ12-8E discovery wells. Wireline evaluation logging programme (NMR, MDT Pressuring and Sampling) has been run, which confirmed the oil pay in T42 reservoir.

The well was plugged and abandoned on 27 September 2014.

This discovery will be evaluated on how best to integrate it into the Beibu Project. Rig HYSY 935 will be moved to the WZ12-10-2 exploration location to drill the second and final well in this programme.

Related topics: 

Got a news tip? Email news@oilandgastechnology.net