Elimination of the circulation behind the string

Rationale – the flow of water into the well due to the circulation behind the string. Poor quality cement stone can cause aquifers to connect with oil. The presence of such channels allows water to flow from the outer annulus into the inner annulus.

The goal – elimination of the circulation behind the string, separation of reservoir layers, reducing the water content of the product.

Key point of the technology – injection of highly viscous hydrophobic stabilized water-oil emulsion (with high injection capacity), injection of Monolith cement-polymer packing composition into the outer annulus both through specialized technological holes (elimination of the lower CBS) and through the existing perforation interval (elimination of the upper CBS) preserving of reservoir properties of the pay bed

Water intake restriction

The main causes of watering wells

Technical:

– behind-the-casing flows;

– the presence of defects in the boring casing

Geological:

– water breakthrough into the well through systems of fractures;

– individual highly permeable intervals (interlayers) of the reservoir;

– formation of a lateral coning;

– rise of oil water contact; .

 

The goal – elimination of water flow areas, reducing the water content of the product.

 

Key point of the technology – We recommend for use a complex technology for limiting water inflow, based on the use of highly viscous hydrophobic stabilized hydrocarbon-based emulsion with Izoplast material, a hydrophobic polymer dispersed system based on water-soluble polymer compositions, followed by reinforcement of the water isolating system by the polymer packing composition Granit or cement-polymer packing composition Monolith (with injectivity more than 150 m3/day.)..

Restoration of cement stone for the capital string

Rationale – water flow into the well due to poor cementing of the capital string.

The goal – to restore the cement stone to segregate the reservoir layers, reducing the water content of the products.

Key point of the technology – injection of the cement-polymer packing composition Monolith into outer annulus through specialized technological holes or existing perforation intervals.

Liquidation of the Leakage of Capital Stream (at low and high injection capacity)

Rationale – the flow of water into the well due to the leakage of the capital string

Goal – to restore the integrity of the capital string, reducing the water content of the production..

Key point of the technology – injection of the polymer grouting composition Granit (with injection capacity up to 150 m3/day) or the injection of a hydrophobic polymer-gel system based on the material Izoplast and the cement-polymer packing composition Monolit-R per day.).