5Mrshall D S. Use of Drill in Completion Fluid Based on Potassium Formate Brine in Gullfaks Field. SPE/IADC 29409.
6Downs J.D, et al Development of Environmentally Benign Formate-Based Drilling and completion Fluids, SPE 27143,1994.
7Hommrd S V.Falimate brines for drilling and onenpletion:mate of the Art.SPE32377,1995.
8Down J D et al.Development of environmentally benign focmate-hased drilling and completion fluids.SPE26334,1994.
9Howard S K. Formate brines for drilling and completion : State of the art [ A ]. AnnulSPE Technician Conference [ C ]. Dallas : Shell Research BV, 1995:483 -496.
10Downs J D, Killie S, W hale G F, et al. Development of environmentally benign formate based drilling and completion fluids [ A]. 2nd SPE et al Health Safety & Environment in Oil & Gas Produce Intelligence Conference Proc V1 [ C]. Jakarta Indon : Shell Research Ltd, Shell Internat Pet rology M I J B,1994:419 -428.