METHOD FOR INVESTIGATION OF HORIZONTAL WELLS Russian patent published in 2018 - IPC E21B47/10 

FIELD: oil and gas industry.

SUBSTANCE: method involves running a downhole tool with a coiled tubing into the well. Measurement of downhole parameters, determination of water inflow zones and water-absorbing intervals. Connection of coiled tubing pipe on the surface to the pump for supplying working medium into the well, in this case, prior to running into the well, the downhole tool is placed below in wall of the coiled tubing pipe, there are technical holes cut for pumping in or pumping out the working medium to/from the well bottom, and measurement of well parameters is carried out first in repression-pumping mode, for example, formation water via the coiled tubing pipe into the well, then selection of formation water is carried out in depression mode, and according to abnormal simultaneous changes of the downhole tool, water-absorbing zones and the zones of water-absorbing intervals are set. In this case, the downhole tool readings are transmitted to the surface via the electromagnetic communication channel, then arrangement of the existing technical openings is aligned with location of specified intervals, and water-insulating composition is pumped through the existing technical openings in the coiled tubing pipe. After expiration of the set holding time of water-insulating composition consolidation in said intervals, repeated measurements of downhole parameters are performed.

EFFECT: invention makes it possible to improve the technology for conducting investigations with subsequent implementation of waterproofing, repair and corrective works on coiled tubing pipe in horizontal wells.

3 cl, 1 dwg