Hydraulic sand blasting perforation large-displacement fracturing technological tubing string and method

A process string and hydraulic injection technology, which is applied in the field of exploration and development of oil and gas fields, can solve problems such as large sand volume, inability to meet multi-stage fracturing, and ejector erosion damage

Active Publication Date: 2015-05-20
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] A large-displacement fracturing process string for hydraulic sandblasting and perforation, which solves the problem of large displacement and large sand volume during volume fracturing construction, serious erosion damage to injectors, and cannot meet the requirements of multi-stage fracturing with one tool. Questions about construction requirements

Method used

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  • Hydraulic sand blasting perforation large-displacement fracturing technological tubing string and method
  • Hydraulic sand blasting perforation large-displacement fracturing technological tubing string and method
  • Hydraulic sand blasting perforation large-displacement fracturing technological tubing string and method

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Embodiment 1

[0023] Embodiment 1: as figure 1 , figure 2 , image 3 and Figure 4 as shown,

[0024] A hydraulic sand blasting perforation large displacement fracturing process string mainly includes: a hydraulic sand blaster, a ball seat, a throttling sand blaster, a K344 packer, a ball seat, a screen pipe, and a plug. The construction method of the pipe string of this process is: put the sealing ball corresponding to the ball seat at the lower end of the sand blaster from the wellhead, when the sealing ball sits on the ball seat at the lower end of the sand blaster, block the pipe string below the ball seat, and pass through the hydraulic sand blaster Carry out sand blasting and perforation. After perforation, reverse circulation washes out the sealing ball, and then puts the sealing ball corresponding to the ball seat at the lower end of the K344 packer from the wellhead to carry out large-volume fracturing construction. After fracturing, reverse circulation Wash out the sealing ba...

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Abstract

The invention discloses a hydraulic sand blasting perforation large-displacement fracturing technological tubing string and method and belongs to the technical field of oil and gas field exploration and development. A hydraulic sand blower is connected with a first ball seat, the other end of the first ball seat is connected with a throttle sand blower, the other end of the throttle sand blower is connected with a K344 packer, the other end of the K344 packer is connected with a second ball seat, the other end of the second ball seat is connected with a sieve tube, the other end of the sieve tube is connected with a plug, the first ball seat is provided with a sealing ball corresponding to a ball seat at the lower end of the sand blower, and the second ball seat is provided with a sealing ball corresponding to a ball seat at the lower end of the K344 packer. The sand blasting perforation fracturing integrated tubing string is adopted, a liquid outlet channel is changed by throwing the sealing balls of different sizes, and different liquid outlet channels are adopted at the different construction stages; the construction requirement for multi-section fracturing by the one-trip tool is met.

Description

technical field [0001] The invention relates to a hydraulic sand blasting perforation large-displacement fracturing process string and a method, belonging to the technical field of oil and gas field exploration and development. Background technique [0002] In recent years, with the continuous development of exploration and development technology, more and more attention has been paid to the development of unconventional oil and gas resources. As one of the important means to stimulate unconventional reservoirs, volume fracturing has also attracted more and more attention. Volume fracturing refers to the injection method of large displacement, large sand volume, large liquid volume, and low sand ratio in the process of hydraulic fracturing, so that natural fractures continue to expand and brittle rocks produce shear slip, forming natural fractures and artificial fractures. Interlaced fracture network, thereby increasing the volume of stimulation, improving initial productio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B43/114
CPCE21B43/114E21B43/26
Inventor 蒙鑫赵振峰李宪文桂捷王在强李旭梅何明舫马占国郝瑞芬
Owner PETROCHINA CO LTD
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