Horizontal well intelligent sliding sleeve

Abstract

The invention provides a horizontal well intelligent sliding sleeve. According to the horizontal well intelligent sliding sleeve, the electromagnetic wave conduction and observation and control technology and the fracturing technology are combined for the first time, a plurality of stages of sliding sleeves can be arranged on a pipe column, underground intelligent sliding sleeves are gradually controlled to be opened through electromagnetic wave signals transmitted by a ground control system, so as to form an O-shaped ball seat, and fracturing on all layer sections can be accomplished by casting balls of the same sizes, so that the technical requirements of unlimited stage number and continuous fracturing are realized; in addition, after the horizontal intelligent sliding sleeve is directly connected with the sleeves and well cementing and completion are performed, sleeve fracturing is performed, the pipe column is not required to be pulled out on the premise of meeting 'volume fracturing' large displacement, the fracturing technology is greatly simplified, the construction efficiency is improved, and meanwhile technical requirements, such as subsequent controllable mining, can be further realized.

Description

technical field [0001] The invention relates to a horizontal well fracturing transformation tool, in particular to an intelligent sliding sleeve for a horizontal well, which belongs to the technical field of oil and gas field fracturing. Background technique [0002] With the development of low-permeability oil and gas reservoirs, due to multiple constraints such as reservoir conditions and fracturing technology, the effect of increasing the production of low-permeability oil and gas reservoirs by simply increasing the fracture length is not obvious. "Volume fracturing" reforms the reservoir by fracturing. While forming one or more main fractures, the natural fractures are continuously expanded and brittle rocks are sheared by adopting the technology of segmented multi-cluster perforation. By moving, a fracture network in which natural fractures and artificial fractures are interlaced is formed, thereby increasing the stimulated volume, increasing initial production and ulti...

AI Technical Summary

Problems solved by technology

[0005] However, in the existing technology, the key tool of hydraulic jetting in oilfields is easily damaged. During the process of segmental fracturing by dragging the tubing, it is necessary to perform jetting and pressure relief for 5 to 7 hours between segments, which cannot be achieved continuously. Fracturing, the fracturing efficiency is low; and for gas field hydrojet, by successively setting up the hydraulic jets with decreasing inner diameter on the tubing from the direction near the wellhead to the far wellhead, and adopting the method of step-by-step pitching, although continuous fracturing can be achieved, However, limited by the grade difference, only limited stages of fracturing can be realized, and it cannot meet the technical requirements of large displacement and later controllable mining

Images