DETERMINATION OF THE OPTIMAL DESIGN OF THE HORIZONTAL BOREHOLE

Abstract

The article presents the development of approximate and accurate methods for substantiating the optimal design of horizontal wells for their productivity. Universal recommendations have been developed that are suitable for use in the development of horizontal wells of deposits of any complexity. The main operational facilities of the oil fields of the Republic of Kazakhstan are at a late stage of development. The reserves of these objects are difficult to recover, which is due to factors such as high oil viscosity, low permeability of reservoirs, as well as high layer-by-layer and zonal heterogeneity, low effective thickness of reservoir layers, the presence of sub-gas zones and lowpower oil fringes. Residual hard-to-recover reserves require the introduction of new technologies. The technology of drilling horizontal wells has huge prospects associated with the possibility of increasing the efficiency of oil production, extending the period of waterless operation of the well and increasing the oil recovery coefficient, involving in the development of reservoirs with low reservoir properties and high-viscosity oil, reducing depression on the formation and the effect of cone formation. The growing interest, worldwide, in the use of horizontal wells, there is a need to develop a theory and study the processes of fluid filtration to the bottom of these wells, taking into account the above factors, and this becomes an urgent scientific and practical task.