Why drilling and completion fluids are more willing to choose potassium formate?
In traditional drilling and completion fluids, inorganic potassium salts are widely used. KCl is mostly used as K + source in anti-collapse drilling fluids. However, with the increase of drilling depth and the difficulty of drilling, the anti-collapse (wellbore stability) of shale in deep formation has become a problem that drilling fluid technology must face and solve. Potassium formate is a new additive for drilling and completion fluids, which has the advantages of strong inhibition, high temperature stability, good compatibility, low corrosivity, good environmental protection and reservoir protection. Potassium formate is mainly used to prepare injection fluid for water-bearing oil wells. Potassium formate has been used in drilling and completion fluids abroad since the late 1990s, especially in high density drilling and completion fluids, and has achieved very good results. The drilling fluid system prepared with potassium formate has the outstanding advantages of strong inhibiti