You are here

CNPC drills China's deepest onshore well in the Tarim Basin

26th January 2015

On January 21, Well Keshen-902 was completed at a depth of 8,038 metres, 15 metres deeper than Well Keshen-7 drilled in 2011 at the same structural belt

On January 21, Well Keshen-902 was completed at a depth of 8,038 metres, 15 metres deeper than Well Keshen-7 drilled in 2011 at the same structural belt
Well Keshen-902 is an appraisal well allocated at the southwest wing of Keshen-9 structural high in the Kelasu structural belt, which is 4.3 kilometres from Well Keshen-7.

The drilling cycle of Well Keshen-902 was 368 days, 380 days shorter than that of Well Keshen-7, with the drilling rate up by 50.8 per cent.

Well Keshen-902 is an appraisal well allocated at the southwest wing of Keshen-9 structural high in the Kelasu structural belt, which is 4.3 kilometres from Well Keshen-7.

It was drilled by the 90002 Drilling Crew of CNPC Chuanqing Drilling Engineering Company Limited by using the domestically developed 9,000-metre electrical drilling rig.

During the drilling operation, ROP enhancing difficulties caused by high gravel content in post-salt formations and falling cuttings were addressed, and imported PDC and turbine plus impregnated bits were used at the target beds. Well Keshen-902 has registered three records: by far the deepest onshore well in China, the largest completion depth in a 333.4mm borehole, and the largest setting depth with 273mm casings.

Tarim Oilfield lies in Tarim basin of southern Xinjiang, which is 1,400 kilometres long from east-west and 520 kilometres wide from north-south, covering an area of 560,000 square kilometres. It is the largest inland basin in China.

Related topics: 

Got a news tip? Email news@oilandgastechnology.net