ЭКОЛОГИЧЕСКАЯ БЕЗОПАСНОСТЬ ПРИМЕНЕНИЯ ИНВЕРТНО-ЭМУЛЬСИОННЫХ БУРОВЫХ РАСТВОРОВ НА БАЗЕ РАСТИТЕЛЬНЫХ МАСЕЛ

In domestic and foreign practice invert emulsion drilling fluids (EDI) get more widespread in well drilling and completion, which ensure successful well steering in complex geological conditions, where using of water-based muds do not allow incident-free drilling. The reason is, first of all, that the hydrocarbon phase is neutral respectively to passable rocks, including salts and clays. Increasing of EDI using is defined by constantly increasing quality demands while opening of reservoirs which is the most important stage in the cycle of well construction. One of the particular difficulty is the opening of reservoirs with long horizontal wells, since the natural reservoir properties of the rocks decrease with depth increasing. Using water-based muds in such conditions leads to the deterioration of the permeability of bottomhole formation zone and the need for a large amount of work on the flow stimulation. Primarily, IDE is used for opening of productive layers with the aim of preserving their reservoir properties, represented by salt deposits, and swelling clays and other rocks, losing stability when in contact with water-based solutions This article discusses a number of shortcomings of EDI, such as high aggressiveness of dispersion medium, and a significant decrease in rheological properties associated with increasing temperature as well as methods for solving these problems.