Study on Safe Drilling Technology for Tuff Formation in S Block of Bozhong
During drilling,A12H well in Block S of Bozhong encountered a large section of tuff formation.During drilling,it was extremely difficult to cut holes.Many wells lost circulation and 9-5/8_casing was not put in place,which seriously affected the operation safety and drilling time.Through investigation,we have a thorough understanding of the reasons for the increasing complexity of drilling tuff formation,and adjust the well structure,mud performance and drilling parameters according to the actual situation in the field.Well A12H achieves the purpose of drilling and provides technical support for later drilling in tuff formation.
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