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Xia J.,5th Drilling Engineering Company | Zuo H.,5th Drilling Engineering Company | Zheng Y.,5th Drilling Engineering Company | Wang B.,5th Drilling Engineering Company | And 3 more authors.
Drilling Fluid and Completion Fluid | Year: 2013

The well Shutan 1H(P) is a key exploration well of Petrochina, and the target zone is Shasan formation. Some difficulties are encountered in this formation, such as lost circulation, well kick, caving and reaming, which reaming is encountered in 11 wells with hole 14 wells, and pipe-stuck is encountered 9 times in 7 wells. In this well, the optimized KCl polysulfonate plugging drilling fluid is applied that polyamine inhibitor, film forming agent, emulsion asphalt and emulsion crude oil are mixed in this drilling fluid system and the active lost circulation control and pressure containment lost circulation control technologies are used to resolve the problems of caving, lubication and lost circulation in deep formations., which the drilling period of this well is only 74 d that is less than Shutan1H of 40 d.

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