Horizontal well cementation segmented multi-cluster volume fracturing technology

Abstract

The invention relates to the technical field of oil field oil production engineering, and belongs to a horizontal well cementation segmented multi-cluster volume fracturing technology. The problems that when ball putting is adopted in a horizontal well cementation sliding sleeve fracturing technology for fracturing construction, each segment of fracturing ball can only open one stage of sliding sleeve, and consequently construction is complex, and cost is high are effectively solved. According to the technology, a horizontal well cementation cluster type sliding sleeve (4), a pressure sliding sleeve (5) and a bump-pressure seat (6) are firstly put down into a well along with a sleeve pipe (1) to design depth; well cementation is carried out, a pipe cleaning tool (2) is put down to scrape away cement in the pipe, the pipe cleaning tool (2) is put down directly to the bump-pressure seat (6) and matched with the bump pressure seat (6) to achieve locking, the cement is returned to a well mouth, and well shut-in and cement setting waiting are carried out pressure bumping; after pump pressure is added to the well mouth to open the pressure sliding sleeve (5), fracturing is carried out on the first layer; a ball (3) is fed to the second layer, and then the ball is sequentially fed to the third layer to the nth layer in sequence for multi-layer-segment fracturing construction. The technology has the advantages of increasing single-well yield, reducing cost, achieving effective development and the like.

Description

technical field [0001] The invention relates to the technical field of oil production engineering in oilfields, and belongs to a segmented multi-cluster volumetric fracturing process for horizontal well cementing. Background technique [0002] At present, when the sliding sleeve fracturing technology of horizontal well cementing adopts ball-pitching for fracturing construction, each segment of fracturing balls can only open one level of sliding sleeve, which cannot perform multi-cluster volume fracturing in horizontal wells, and the construction efficiency is low, and the reservoir cannot be fully recovered. remodel. Contents of the invention [0003] The purpose of the present invention is to design a horizontal well cementing staged multi-cluster volumetric fracturing process that can open multi-cluster sliding sleeves through the first-stage fracturing ball to perform cluster fracturing construction, reduce construction procedures, and increase single well production. ...

AI Technical Summary

Problems solved by technology

[0002] At present, when the sliding sleeve fracturing technology of horizontal well cementing adopts ball-pitching for fracturing construction, each segment of fracturing balls can only open one level of sliding sleeve, which cannot perform multi-cluster volume fracturing in horizontal wells, and the construction efficiency is low, and the reservoir cannot be fully recovered. transform

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