METHOD OF DEVELOPING OIL DEPOSIT IN FRACTURED CARBONATE RESERVOIRS

摘要

The invention relates to oil industry and can be used in developing an oil deposit at a completion stage. A method of developing an oil deposit in fractured layered carbonate reservoirs is characterised in that vertical injection and production boreholes are drilled, then water is injected into vertical injection boreholes and oil is taken away via vertical production boreholes. A structural and tectonic structure of an oil deposit, distribution of production beds and hydrodynamically insulating bulkheads therebetween relative to the area and its profile are determined. A detailed constantly working geologic-tectonic model is plotted. Zones of maximum potential of filtration intensity are determined. Effective volumes of water injection and conductivity of main tectonic disturbances at a stage of the detailed constantly working geologic-tectonic model adaptation, using the results of the seepage tracing, are determined. Localisation zones of the maximum potential of the filtration intensity are determined in case of presence of the distribution zones of the hydrodynamically insulating bulkhead between watered and oil-saturated beds, which is equal or greater of the drainage zone of a vertical borehole. In the zones of localisation of the maximum potential of the filtration intensity locations of vertical boreholes from low-yield or abandoned boreholes stock are determined and, using them, side horizontal holes and/or horizontal boreholes are drilled. The technical result consists in increasing oil recovery from the deposit at the completion stage of its development.