Casing completion multiple-segment fracturing horizontal well water exploration tubular pile and water exploration method thereof

Abstract

The invention discloses a casing completion multiple-segment fracturing horizontal well water exploration tubular pile and a water exploration method thereof and aims to guarantee the water controlling and oil adding measurements of a horizontal well. The water exploration tubular pile comprises a screwed plug, intelligent switches in multiple stages, hydraulic isolators Y341 in multiple stages, a mechanical isolator Y221, a screen tube, a cylinder pump and a sucker rod which are connected. The water exploration tubular pile is operated through procedures of assembling a pile body with the well, sealing the isolator, exploring water in a segmented manner and removing the tubular pile. The hydraulic isolators Y341 in multiple stages can isolate the tubing casing annulus effectively, a pile body can be anchored through the mechanical isolator, segmented production of segments can be implemented through the intelligent switches, and the screen tube is capable of measuring and acquiring multi-layer dynamic liquid levels. By the aid of the water exploration tubular pile, a construction tubular pile and a production tubular pile can be finished once, the process is simple, the water exploration tubular pile is safe and reliable, tests of capacity, pressure and temperature of multiple layers of the horizontal well can be completed once, the water discharging segment and water flow can be confirmed, and the reliable basis is provided for the water controlling and oil adding measurements of the horizontal well.

Description

technical field [0001] The invention relates to a casing well completion multi-stage fracturing horizontal well mechanical water finding pipe string and a water finding method thereof, belonging to the technical field of oil field recovery. Background technique [0002] Using horizontal wells to develop low-permeability oilfields can greatly improve the development effect and increase the recovery factor. Horizontal wells have a longer completion interval than vertical wells, and the production of oil wells can be increased by expanding the drainage area of ​​oil layers, which can reach more than three times the production of vertical wells. However, due to the complex and changeable wellbore trajectory and injection-production well pattern of the horizontal well itself, the lithology, physical properties and reservoir fluid properties of each oil layer are different, so the water absorption capacity, waterline advancing speed and production rate of the horizontal well in ea...

AI Technical Summary

Problems solved by technology

However, because most of the high water cut and water flooded horizontal wells are seriously scaled, after the hydraulic packer is set, the rod type oil production pump piston and sucker rod cannot be lowered into the pump barrel smoothly, and the Y441 two-way slip packer in the horizontal section It is difficult to unpack; if the Y341 packer is used alone, the tubing string will easily creep during the swabbing process, which will affect the sealing of the tubing string

Images