ENHANCED OIL RECOVERY

Improvement of the flooding system using chemical methods of formation stimulation is a pressing task. Shutoff of the most permeable, water-washed interlayers is the most important task for prevention of the advanced watering of well products.

For this purpose, a number of technologies are used based on the injection of different volumes of diverter compositions.

Purpose of technologies:

• Vertical conformance;
• Enhanced oil recovery.
• Scope:
• Terrigenous reservoir, fractured & porous;
• Carbonate reservoir, porous, fractured, fractured & porous;
• Average number of permeable intervals is more than 2;
• Temperature in the injection zone is not more than 90°С.

Advantages:

• Regulation of gelling time in the range of several hours to 1О days;
• The ability to penetrate deep into the formation over considerable distances and to create extensive water insulation screens;
• Effective colmatation of the fracture system of the formation.

Different types of technologies are used depending on geo technical conditions:

• CPS - crosslinked polymer systems
• PDS - polymer dispersion systems
• DF- dispersion fibre silicate systems
• BPC - biopolymer compositions
• SGPS - self-gelling polymer systems
• WEDS – water emulsion dispersion systems