Key Technologies for Faster Drilling in Bozi 2402 Well
At present,most of the wells deployed in Block 1 of Tarim Bozi are of a five well casing structure,with an average well depth of over 7000m.The geological structure is complex,the con-struction difficulty is high,and accidents occur frequently,result-ing in a construction period generally exceeding 400 days.The fre-quent occurrence of accidents in the Jidike Formation,Kumuge-liemu Group salt layer,and target layer in this block has become a difficult drilling problem,especially in the upper thick gravel lay-er,which seriously restricts the efficient exploration and develop-ment of regional resources.The actual drilling performance is slow mechanical drilling speed,low single drill bit travel footage,and frequent downhole drilling tool accidents caused by poor jumping drilling.Starting from the optimization of wellbore quality,drill bit selection technology,drilling tool combination optimization tech-nology,drilling fluid system optimization,salt layer jamming tech-nology,etc.,key technologies for improving drilling speed of Bozi 2402 well have been formed.The final drilling cycle of this well is 253.88 days,with a completion cycle of 303.88 days,setting a record for the comple-tion cycle of Bozi 1 Block.The key drilling technology of Bozi 2402 well can provide technical support for drilling in Bozi 1 Block,and it is recommended to promote it.
Bozi 1 BlockHaiborui drill bitdrill bit selectiondrilling tool combinationfaster Drilling
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