Horizontal well process pipe column

Abstract

The invention provides a horizontal well process string, comprising: a first casing, a multi-stage second casing, a multi-stage intelligent sliding casing, a two-stage third casing, a blasting valve, a floating hoop and a floating shoe. The horizontal well process pipe string provided by the present invention combines electromagnetic wave transmission, measurement and control technology and fracturing technology for the first time, and multi-stage intelligent sliding sleeves can be set on the pipe string, and the electromagnetic wave signals emitted by the ground control system control the opening of the downhole intelligent sliding sleeves one by one. O ball seat, throwing balls of the same size can complete the fracturing of each layer, thereby realizing the technical requirements of unlimited stages and continuous fracturing; and the intelligent sliding sleeve of the horizontal well provided by the invention is directly connected to the casing The bare casing fracturing is carried out after connection cementing and completion. Under the premise of meeting the large displacement of "volume fracturing", there is no need to trip the string, which greatly simplifies the fracturing process and improves the construction efficiency. Controlled mining and other technical requirements.

Description

technical field [0001] The invention relates to a process pipe string, in particular to a horizontal well process pipe string, which belongs to the technical field of fracturing in oil and gas fields. 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 ultimate recovery. [0003] As a represe...

AI Technical Summary

Problems solved by technology

[0005] However, the existing hydraulic injection process string, for the oil field hydraulic injection, its key tool, the hydraulic injector, is easily damaged. During the process of segmental fracturing reconstruction by dragging the tubing, it is necessary to perform spraying and pressure relief for 5 to 7 hours between segments , continuous fracturing cannot be achieved, and the fracturing efficiency is low; while for gas field hydraulic jetting, hydraulic jets with decreasing inner diameters are installed on the tubing from near wellhead to far Continuous fracturing, but limited by the grade difference, can only achieve limited-stage fracturing, and cannot meet the technical requirements of large displacement and later controllable mining

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