Well stimulation is one of the ways to enhance oil recovery at the closing stage of the field development with low formation pressure. To reduce the adverse effects of stimulation on the bottom-hole formation zone and to reduce the effect on the productive formation caused by fluid filtrates used during hoist unit-based maintenance and to accelerate testing of the well and bringing it on to stable production, well workover should be performed using coiled tubing.

When performing well workover for the purpose of production stimulation it is necessary to develop new compounds and maintenance methods; moreover, to ensure successful well workover it is recommended to develop techniques individually for each well.

The use of fluids during well workover is part of the well workover technology, hence the development and introduction of new fluids is one of the main factors of successful well servicing.

Any well maintenance operations require the use of fluids and those fluids can differ in composition and density and their use can be limited by high formation temperature. Using fluids whose filtrates do not react with the minerals comprising the bottomhole formation zone is one of the ways to mitigate the adverse consequences of well workover.

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