METHOD TO LIMIT BOTTOM WATER INFLOW TO OPERATING BOREHOLES DURING FLOATING OIL RESERVOIR DEVELOPMENT

摘要

This invention relates to the oil-producing industry, in particular, to the ways of water inflow zone isolation. The objective of the invention is to create an effective and long-term protective shield in the bottom of oil bed preventing bottom water entry to operating borehole. The assigned objective is reached by doing the following: the way of limiting bottom water inflow to operating boreholes during development of floating oil reservoirs including borehole cleanout and grouting mixture pumping to borehole assumes that the watered grounds adjacent to the bottom of bed are treated by shock waves with creation of additional permeability in them, then grouting mixture is pumped to the treated rocks to form waterproofing colmatation shield the required parameters of which shall be calculated, rocks by the bottom of oil bed are treated and grouting mixture is pumped when exposed to shock waves that are generated at the borehole collar and transferred through a liquid waveguide with further turning to the interval of colmatation shield construction using reflector.