Method for interval action on horizontal wells

A horizontal segment of the well is bored preliminarily, the segment being constructed through a formation with various permeability zones. A geophysical survey is conducted, and the number of oil recovery intervals of various categories and their lengths are determined. A tail pipe (or tail filter) of the casing string with packers and drive shoe are lowered down and installed in the horizontal segment. A pump and an assembly on the pipe string are lowered down into the well, the assembly including electric valves with pressure and temperature sensors, cabling, and packers separating the annular space of the well. The assembly packers are arranged opposite to the casing string packers. While lowering down the assembly, some electric valves are opened, and another electric valve (for circulation) is closed. Data from the sensors are monitored. The formation segments are periodically treated by injecting a chemical composition into the corresponding intervals.