Device and method for researching transfer laws of temporary blockage agent in horizontal well or vertical well temporary blockage fracturing

A technology of research level and temporary plugging agent, which is applied in wellbore/well components, earthwork drilling and production, educational tools, etc., and can solve problems such as the difficulty of knowing and exploring the location of crack initiation

Active Publication Date: 2018-10-26
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because it is difficult to explore where the temporary plugging agent stays in the perforation cluster and where it penetrates into the artificial fracture during the migration process of the horizontal wellbore. At the same time, the crack initiation position of each cluster is also different. The joint effect of the heterogeneity of the upper formation makes it difficult to know the location of the next cluster of fractures after temporary plugging

Method used

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  • Device and method for researching transfer laws of temporary blockage agent in horizontal well or vertical well temporary blockage fracturing
  • Device and method for researching transfer laws of temporary blockage agent in horizontal well or vertical well temporary blockage fracturing
  • Device and method for researching transfer laws of temporary blockage agent in horizontal well or vertical well temporary blockage fracturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Set the experimental conditions:

[0072] ①Experimental temperature: room temperature

[0073] ②Experimental materials: degradable fiber, 40-70 mesh ceramsite

[0074] ③Experimental fluid: guar gum powder + fiber + temporary plugging agent + water;

[0075] ④Experimental pressure: 0.4Mpa.

[0076] S1, installation, install a total of 3m first extended wellbore 10a between the two perforation clusters, install 16 perforation holes with a length of 18cm and a diameter of 1.5cm on each perforation cluster; in the directional perforation cluster module The middle perforation hole of the first section 41 of 4 is connected to the first main fracture 51, and the first main fracture 51 is followed by branch fracture groups 53 with included angles of 90°, 135°, and 180° respectively; the working fluid is configured,

[0077] S2, pour tap water into about two-thirds of the cylinder of the stirring tank, weigh 3kg of guar gum, 1kg of fiber, 40kg of proppant, weigh the designed ...

Embodiment 2

[0081] Set the experimental conditions:

[0082] ①Experimental temperature: room temperature

[0083] ②Experimental materials: degradable fiber, 40-70 mesh ceramsite

[0084] ③Experimental fluid: guar gum powder + fiber + temporary plugging agent + water;

[0085] ④Experimental pressure: 0.4Mpa.

[0086] S1, installation, install a total of 3m first extended wellbore 10a in the middle of the two perforation clusters, install 8 perforation holes with a length of 18cm and a diameter of 1.5cm on each perforation cluster, and 8 solid holes with untapped holes Perforation cylinder; the first main fracture 51 is connected to the middle perforation hole of the first section 41 of the directional perforation cluster module 4, and the first main fracture 51 is followed by branch fractures with angles of 90° and 135° respectively Group 53: Glue is applied to the main cracks and branch cracks, and uniformly distributed micro-gravel particles are glued to artificially create a friction...

Embodiment 3

[0091] Set the experimental conditions:

[0092] ①Experimental temperature: room temperature

[0093] ②Experimental materials Degradable fiber, 40-70 mesh ceramsite

[0094] ③Experimental fluid: guar gum powder + fiber + temporary plugging agent + water;

[0095] ④Experimental pressure: 0.4Mpa.

[0096] S1, installation, install a total of 5m first extended wellbore 10a in the middle of the two perforation clusters, install 8 perforation holes with a length of 18cm and a diameter of 1.5cm, and 8 perforations with a length of 18cm and a diameter of 2cm on each perforation cluster The perforation hole of the vertical wellbore module 3 is set upside down; the first main fracture 51 is connected to the middle perforation hole of the first section 41 of the directional perforation cluster module 4, and the first main fracture 51 is followed by an included angle 90° and 135° branch joint groups 53 respectively; the main cracks and branch joints are coated with glue and uniformly ...

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Abstract

The invention discloses a device and method for researching transfer laws of a temporary blockage agent in horizontal well or vertical well temporary blockage fracturing. The device for researching transfer laws of the temporary blockage agent in horizontal well or vertical well temporary blockage fracturing comprises a stirring module, a horizontal well shaft module, a vertical well shaft module,a directional perforation cluster module and a crack simulation module; the stirring module is used for stirring a working solution or a temporary blocking agent; the horizontal well shaft module isconnected with the stirring module and used for simulating the horizontal well shaft; the vertical well shaft module is connected with the horizontal well shaft module and used for simulating the vertical well shaft; the directional perforation cluster module is installed on the horizontal well shaft module and used for simulating horizontal well underground perforation; the crack simulation module is connected with the direction perforation cluster module and the vertical well shaft module and used for simulating underground cracks.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a device and method for studying the migration law of temporary plugging agent in horizontal well or vertical well temporary plugging fracturing. Background technique [0002] With the progress of society, the world's oil recovery technology is also changing with each passing day. People's mining vision has gradually shifted from the development of conventional oil and gas fields to the development of unconventional energy resources, such as shale gas, shale oil, and coalbed methane. Hydraulic fracturing is an increasingly mature and effective measure to deal with various problems in old and high water-cut oil and gas fields, such as increasing production and efficiency, improving recovery, and studying remaining oil. In cluster fracturing of horizontal wells, it is hoped that the fractures can be initiated in stages, and even the fractures need to be re-in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B33/13E21B43/11E21B47/00G09B25/02
CPCE21B33/13E21B43/11E21B43/26E21B47/002G09B25/02
Inventor 郭天魁王晓之张伟曲占庆田启忠吕玮林强巩法成刘晓强陈昱辛
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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