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Staged fracturing crack extension control device and method

A technology of fracture expansion and staged fracturing, applied in the field of oil well fracturing, which can solve the problems of water flooding of oil wells, reduction of effective fracture volume, large fracture height, etc., and achieve the effect of increasing oil and gas production capacity, considerable economic benefits and social benefits

Pending Publication Date: 2018-05-04
XI'AN PETROLEUM UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Fracturing in series, the fracture height is too large, the effective fracture volume in the reservoir decreases, and even the water layer flows in series, resulting in water flooding of the oil well

Method used

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  • Staged fracturing crack extension control device and method
  • Staged fracturing crack extension control device and method
  • Staged fracturing crack extension control device and method

Examples

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Embodiment 1

[0024] A method for controlling crack expansion in staged fracturing, comprising the following steps:

[0025] Step 1. According to the pre-design plan of the direction of the crack, first set the rotation angle of the electromagnetic coil 6 in the direction perpendicular to the working plane through the computer-controlled electric rotation mechanism 5 on the ground, and set it to be 0°, 30°, upward or downward. 60°, 90°, 120°; secondly, the direction of direct current transmission is determined by the right-hand spiral rule;

[0026] Step 2. According to the distribution and simulation calculation of the spatial magnetic field intensity value near the energized circular coil (see the published article "Distribution and simulation of the spatial magnetic field intensity value near the energized circular coil", Wang Zhixuan, etc.) to simulate the electromagnetic field intensity value under different current sizes According to the spatial distribution, the maximum value of the ...

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Abstract

The invention provides a staged fracturing crack extension control device and method. A continuous oil tube is downwards connected with a hydraulic jetting fracturing tubular column; the hydraulic jetting fracturing tubular column is downwards connected with a fixing joint; an electric rotating mechanism is arranged in a cavity in the fixing joint; the lower end of the fixing joint is in clamped connection with an electromagnetic coil in the radial direction; wiring tubes are fixedly wound the inner walls of the continuous oil tube and the hydraulic jetting fracturing tubular column in a spiral rising manner; the wiring tubes linearly penetrate through a connector and the fixing joint; one of the wiring tubes is connected with the electric rotating mechanism in a one-way manner while the other wiring tube is wound on an iron core in a loop manner to form an electromagnetic coil; and under cooperation of the continuous oil tube, electric wires, the fixing joint and the electromagnetic coil, the delivering strength and direction of direct current on the ground and a placement angle of the electromagnetic coil are adjusted to control the direction and intensity of an electromagnetic field generated by the electromagnetic coil in real time, directional or steering movement of fracturing liquid which has superparamagnetism is guided, and the trend and height of cracks are controlledmanually.

Description

technical field [0001] The invention relates to the technical field of oil well fracturing, in particular to a device and method for controlling crack expansion in staged fracturing. Background technique [0002] With the rapid development and application of nanomaterials, sodium oleate encapsulated Fe 3 o 4 Nanoparticles have the characteristics of superhydrophobic and superparamagnetic on the surface, and have been successfully applied in field experiments to enhance oil recovery. Similarly, this feature can be extended to the use of thickeners to wrap Fe 3 o 4 Nanoparticles are used to prepare jelly fracturing fluid, which makes the fracturing fluid have superparamagnetic properties, and can make directional or steering movements under the action of a magnetic field, and artificially control the expansion of fractures. Looking back at the status quo of domestic staged fracturing operations, the extension direction and height of fracturing fractures mainly depend on na...

Claims

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Application Information

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IPC IPC(8): E21B43/26
CPCE21B43/26
Inventor 彭娇曲冠政周德胜黄海闫健彭龙
Owner XI'AN PETROLEUM UNIVERSITY
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