ChinOil has implemented a new technology for major well workover

The Company has already completed the pilot testing.

The essence of the technique lies in temporary clogging in the process of well workover. This is the process of penetration of small particles and microorganisms into the cracks of rocks, into filters of treatment facilities and drainage workings, and the precipitation of chemicals in them, contributing to a decrease in their water or gas permeability.

This process can be either natural or artificial.

In this case, it is artificial.

Liquids and gases can serve as carriers of the bridging agent (colmatant). Clogging can be mechanical, chemical, thermal and biological.

The temporary clogging method allows abandoning expensive cementing and subsequent drilling of cement plugs that break the well connection with horizons that have low reservoir pressure.

Replacing traditional cement slurry with a modern active compound makes it possible to simplify the process of isolating formations, which absorb the well fluid. If it is necessary to restore the working capacity of the horizon, the new method ensures the guaranteed destruction of the blocking pack by special water-base reagents.

This technology significantly simplifies the operation of the transition to lower formations during the well workover.

Application of the temporary clogging technology confirmed the reduction of actual costs and well workover duration by 10% on average compared to the standard operation.