The Use of Oil, Mineralized Water and Non-ionic Surfactants in Flow-Deflecting Technologies for Enhanced Oil Recovery and for Water Isolation of Depleted Reservoirs

In depleted fields the use of geological and technical measures (GTM) such as flow-deflecting technologies to increase oil recovery and water isolation does not give a noticeable effect in the form of additional oil produced and a decrease in the volume of water produced along the way. To reduce the cost of GTM, it is possible to use substances that are available at each field, namely oil (including residual) and mineralized water for the formation of a grouting mass in the reservoir, with a small consumption of specially selected non-ionic surfactants. To increase the effectiveness of exposure and reduce costs, these formulations can be pumped into individual injection wells (focal impact) or through cluster pumping stations (CPS). The compositions can be used for permanent or temporary blocking of the receiving intervals of injection wells (depending on the task), as well as for blocking water-saturated interlayers. It was shown experimentally that formulations based on residual reservoir oil, highly mineralized water (the main components of the grouting mass) and oil-soluble non-ionic surfactant Neonol AF-6 can be used in flow-deflecting technologies and for water insulation.