Sectional synchronous flow rate and water content monitoring and water exploration tubular column of multi-section fracturing horizontal well and working method thereof

Abstract

The invention discloses a sectional synchronous flow rate and water content monitoring and water exploration tubular column of a multi-section fracturing horizontal well and a working method thereof, and the tubular column is designed for realizing synchronous monitoring and water exploration for all intervals of the horizontal well through one trip of the tubular column. The tubular column is arranged between a screwed plug and an oil well pump, multiple stages of connecting units consisting of underground storage flow rate and water content monitors and packers are connected through oil pipes, and each stage of connecting unit corresponds to one interval respectively; the upper end of the underground storage flow rate and water content monitor at the top stage is connected with the oil well pump through an oil pipe, the oil pipe is connected to a wellhead, and the oil well pump is connected to a ground pumping unit through a sucker rod. The tubular column adopts the underground storage flow rate and water content monitors, so that synchronous flow rate and water content monitoring and water exploration for multiple intervals through one trip of the tubular column can be realized, the original manner that production and water exploration for each interval are separated is converted into the manner of synchronous production and water exploration, the water exploration period can be significantly shortened, the water discharge interval and the water discharge rate can be determined, the water exploration efficiency is improved, and a reliable basis can be provided for water control and oil production enhancement measures for the horizontal well.

Description

technical field [0001] The invention relates to a multi-stage fracturing horizontal well segmented flow rate and water content simultaneous monitoring water finding pipe string and its working method, belonging to the technical field of oil field recovery. Background technique [0002] At present, major oilfields in China are vigorously promoting horizontal well production technology with the core of improving reservoir production degree, increasing recovery rate, increasing single well production and reducing production cost. The wellbore trajectories and injection-production well patterns of horizontal wells are complex and changeable, and the lithology, physical properties and reservoir fluid properties of each oil layer are different. The water breakthrough is early, the water breakthrough level and direction are not clear, the productivity and pressure of each layer are not clear, and the water finding technology is immature, especially the water finding technology of l...

AI Technical Summary

Problems solved by technology

The wellbore trajectories and injection-production well patterns of horizontal wells are complex and changeable, and the lithology, physical properties and reservoir fluid properties of each oil layer are different. The water breakthrough is early, the water breakthrough level and direction are not clear, the productivity and pressure of each layer are not clear, and the water finding technology is immature, especially the water finding technology of low liquid volume horizontal wells in low permeability reservoirs is still in the exploration and research stage, on-site dynamic adjustment measures are not targeted, which seriously affects the development effect of horizontal wells

At present, the existing casing completion horizontal well segmented water detection test string uses an intelligent switch to control the timing of each layer, and produces each layer one by one. The water content of each segment is analyzed through ground testing to determine the water-producing layer. Each segment must be produced independently for 10 days, and the water search cycle is too long, which seriously affects the production progress on site, and is not suitable for the water search requirements of multi-cluster long horizontal section horizontal wells

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