Method of exploiting an oil-bearing seam

摘要

Water passes through a pump-compressor pipe (3) to the inlet of the working nozzle of the bottom hole injector (2). Gas-water foam from a low-pressure ejector (1) is pumped into the space (6) between the pipes. A water-gas mixture with an acceptable gas content and the requisite high injection pressure into the seam is formed below the packer (4) at the outlet of the diffuser of the injector (2). The water-gas mixture passing through the hydrodynamic generator (5) produces elastic vibrations. The water-gas mixture is injected into the seam, the mixture effectively penetrating the pores and crevices of low permeability in the reservoir rock and a greater volume of the seam can be treated by the injection process. The proposed method is recommended for the exploitation of fields where the reserves are hard to extract and for the extraction of oil from heterogeneous seams of low permeability. The method permits the use of simpler technology, since it does not require specialized equipment at the surface for handling high-pressure gas. It also allows a substantial saving in materials and equipment and no major capital investment is needed when the method is applied under field conditions.