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Well Moshen-1─ the deepest onshore exploration well in China completed
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Well Moshen-1─ the deepest onshore exploration well in China completed
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Publish time:
25
th
July, 2008
Source:
CNPC
Information collection and data processing: CCM For more information, please
contact us
On July 23, well Moshen-1, which is located in the hinterland of the Junggar Basin, was completed while formation testing of the well is ongoing.
Well Moshen-1 is the deepest onshore risk exploration well in China with a designed depth of 7,380 m and was completed at a depth of 7,500 m. By using CNPC's independently developed ZJ90/6750DB drilling rig, the well is drilled by No. 90001 drilling crew from Karamay Drilling Company which is affiliated to Western Drilling Engineering Corporation of CNPC.
The well began to be drilled on August 13, 2006. During the third spud-in section between 4,463m and 6,500m, the drilling crew had been confronted with big challenges in mud selecting, oil and gas control, and prevention and handling of troubles due to a high bottomhole temperature of 165oC and a formation pressure coefficient up to 2.1.
Successful and efficient drilling of the well was realized, thanks to high pumping pressure and large displacement, optimized drilling parameters, the HTHP KDF water-based drilling fluid system and PDC drilling bits. Drilling and completion of well Moshen-1 have not only resulted in significant geologic discovery, but will also promote the progress of China's ultra-deep well drilling.
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