Injection wells profile conformance control

DESCRIPTION OF THE TECHNOLOGY

Conformance control is one of the methods for increasing the reservoir recovery rate.

The conformance control consists of injecting of slowly cross-linking compounds (cross-linked polymeric and/or thermotropic gelling systems) into the bottom hole formation zone of the injection wells. These compounds penetrate deep into the formation over significant distances and redistribute the filtration flows in the formation.

The use of technologies is possible, including in the presence of a hydrodynamic connection between the interlayers. Solutions fill the interlayers and thereby create dewatering in the formation, that helps to direct water flows to the producing well and thereby increase the additional inflow of oil.

The volume of injected liquid is determined by the structure and feature of the rocks and ranges from 200 to 5000 m³.

Application area

• Terrigenous and carbonate, pore and fissured-pore oil and gas bearing formations with a expressed capacitive and filtration non-uniformity in power, characterized by high and low permeability, as well as medium-permeable intervals. The obligatory presence of a waterflooding pattern (area, row, focal and selective, contour) and initial injectability not less than 150 m³ / day. The stage of the field development is not regulated.