Some aspects of optimal comptomise and sequence of technologies applied for limitation of water inflows and increase of formations oil recovery while developing deposits with different types of oils
The paper presents results of computational experiments and generalization of practical experience in using the most common methods applied for water inflows reduction and oil recovery enhancement (SIF - straightening of the injectivity profile; ISJ – isolation squeeze jobs; cyclic water-flooding; and FHF – a formation hydraulic fracturing) in order to optimize their joint and consistent application in the most encountered geological conditions of Western Siberia. The most acceptable and, conversely, unacceptable variants of the methods’ combination are shown. To optimize the sequence of the methods’ application for various types of oil deposits some mechanisms of their operation in a variety of geological and technical conditions, such as in dissected and monolithic permeably-heterogeneous layers, when permeability grows along the section both from top downward and from the bottom upwards, as well as in water-floating oil deposits with a separating shale streak are considered in detail.