With the recent proliferation of horizontal wellbores and open-hole completions, many drilling and completion engineers now consider the completion operation to begin as soon as the drill bit enters the productive interval. Therefore, it is necessary to plan procedures and implement practices to reduce formation damage and maximize productivity at the earliest possible stage. Proper selection and application of the completion fluid is an integral part of this process.
Completion fluid can be defined as any fluid pumped downhole to conduct operations after the initial drilling of a well. Workover fluids are used during remedial operations after a well has been completed and produced oil and/or gas. Clear, solids-free brine completion/workover fluids serve to control downhole formation pressures while reducing the risk of permanent formation damage resulting from solids invasions or some form of incompatibility between the completion fluid and the situ matrix. The clear brines used are pure solutions of dissolved salt in water and must be stable at surface and downhole conditions.
Among the typical operations in which clear brines are applied are well kills, perforating, washing, drilling and gravel packing and as packer fluids. Completion fluids have no purpose within the formation and may in fact reduce the permeability. Clear brine completion fluids are formulated and applied in the field according to performance specifications that ensure well control with minimal permeability reduction.
WIG designed a complete mobile unit, used for brine mixing, consists of pipeline, extensions and required instrumentation for process monitoring. Unit to junction box fixed wiring. KROHNE Coriolis Optimass 1000 measuring device is used for brine quality monitoring.
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