High-temperature resistant organic salt drilling fluid technology for GT1 well
The geological condition of the GT1 well is complex,and multiple faults and high-pressure gas formations are predicted to exist according to geological prediction.Therefore,the high-temperature resistant organic salt drilling fluid system is selected for the third-and fourth-spud of the well.This system is strong in inhibition,high-temperature resistance,and clay pollution resistance,making stable wellbore.The application of a high-temperature resistant organic salt drilling fluid system in GT1 well shows that compared to similar well conditions in KT1 well,dynamic initial and 10-min gel strength as well as dynamic plastic ratio of the drilling fluid in GT1 well are higher,more conducive to wellbore cleaning.The average expansion rate of the section drilled with organic salt system in GT1 well is smaller.The drilling fluid's inhibition is stronger,the wellbore is more stable,and the wellbore diameter is more uniform.The average penetration rate of GT1 well is 26.38%higher than that of KT1 well,reducing the throttling circulation time and shortening drilling and completion cycle.
organic salt drilling fluidhigh-temperature resistanceclay pollution resistanceborehole stability
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