The Efficiency of Drilling Wells in the Korobkovsky Area of Bavlinsky Field

Kizelian horizon of Tournasian in the Bavlinsky field is composed of limestone, the development of which was started in 1976. The block No.6 is the most drilled both by vertical and horizontal wells on the Kizelian area, which accounts for 53% of horizontal wells drilled in the field. In 2002, the Institute TatNIPIneft in close collaboration with the geological survey of oil-and-gas production department Bavlyneft proposed a new complex technology for the development of carbonate reservoirs. The technology includes a nine-point areal location of wells with horizontal and vertical trunks and injection well in the center of the element. Drilling of the field is recommended in a certain order – primarily to drill wells for the inter-well pumping of water, and then, after studying the geological features of drillable element, to drill injection wells. According to the drilling results geological structure is studied, structure maps, general and oil-saturated strata maps are constructed. Reservoir capacity, reservoir pressure parameters are measured. Drilling of wells for inter-well pumping of water and injection wells from a single group can reduce the cost of high-pressure water pipelines and pumping of water without cooling it, i.e., to take advantage of the isothermal flooding. Annual growth of oil production in the Kizelian horizon of Korobkovsky area of Bavlinsky oil field has become the result of the technology application.