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A kind of oil-soluble hydraulic fracturing temporary plugging and diverting agent and preparation method thereof

A hydraulic fracturing, oil-soluble technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as low breakthrough pressure, and achieve the effects of adjustable temperature, wide softening point range, and good oil solubility

Active Publication Date: 2018-09-14
SHAANXI XINGYOU TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an oil-soluble hydraulic fracturing temporary plugging and diverting agent with a breakthrough pressure gradient of 50 MPa / m or more, which solves the shortcoming that the breakthrough pressure of the traditional oil-soluble fracturing temporary plugging and diverting agent is too low

Method used

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  • A kind of oil-soluble hydraulic fracturing temporary plugging and diverting agent and preparation method thereof
  • A kind of oil-soluble hydraulic fracturing temporary plugging and diverting agent and preparation method thereof
  • A kind of oil-soluble hydraulic fracturing temporary plugging and diverting agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the oil-soluble hydraulic fracturing temporary plugging diversion agent provided in this embodiment is as follows:

[0022] Weigh 1.0% zinc stearate, 2.0% polyacetate fiber, 0.1% sodium sulfite, 0.1% oil soluble blue, 96.8% rosin modified pentaerythritol resin according to mass ratio. Add the above-mentioned raw materials into a kneader, stir and heat at 230°C for 5 minutes, mix well, extrude through a screw, and cut into sections. Cylindrical particles with a particle diameter of 2 mm and a length of 3 mm were obtained. Pour cylindrical granules into a spheroidizer while they are still hot, round them for 30 minutes, and then sieve to obtain granulated finished products.

[0023] In order to test the performance of the oil-soluble fracturing temporary plugging diverting agent, the oil-soluble hydraulic fracturing temporary plugging diverting agent prepared in this example was tested for breakthrough pressure outburst. ~40 mesh ceramsite prop...

Embodiment 2

[0034] The preparation method of the oil-soluble hydraulic fracturing temporary plugging diversion agent provided in this embodiment is as follows:

[0035] The mixture of 0.5% alkyltrimethylammonium bromide, 4.5% polyvinyl alcohol fiber, 0.17% sodium sulfite, 0.13% Sudan red, 94.7% rosin modified phenolic resin and petroleum resin was weighed by mass ratio. Add the above-mentioned raw materials into a kneader, stir and heat at 230°C for 5 minutes, mix well, extrude through a screw, and cut into sections. Cylindrical particles with a particle diameter of 2 mm and a length of 3 mm were obtained. Pour cylindrical granules into a spheroidizer while they are still hot, round them for 30 minutes, and then sieve to obtain granulated finished products.

Embodiment 3

[0037] The preparation method of the oil-soluble hydraulic fracturing temporary plugging diversion agent provided in this embodiment is as follows:

[0038] Weigh the mixture of 1.5% zinc stearate and alkyltrimethylammonium bromide, 1.5% polyacetate fiber, 0.05% sodium sulfite, 0.05% oil soluble red, 96.9% p-tert-butylphenol formaldehyde resin by mass ratio. Add the above-mentioned raw materials into a kneader, stir and heat at 230°C for 5 minutes, mix well, extrude through a screw, and cut into sections. Cylindrical particles with a particle diameter of 2 mm and a length of 3 mm were obtained. Pour cylindrical granules into a spheroidizer while they are still hot, round them for 30 minutes, and then sieve to obtain granulated finished products.

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Abstract

The invention provides an oil-soluble hydraulic fracture temporary plugging reorientation agent with the breakthrough pressure gradient higher than 50 MPa / m. The oil-soluble hydraulic fracture temporary plugging reorientation agent comprises a fluidity regulator, a toughener, a heat stabilizer, a colorant and the balance of an oil-soluble adhesive, wherein the oil-soluble adhesive has an adhesion function, can deform under the actions of the formation temperature and pressure and be adhered to crack and rock surfaces to realize plugging, particularly adopts one or two of rosin modified pentaerythritol resin, rosin modified phenolic resin, p-tert-butylphenol-formaldehyde resin and petroleum resin. The invention further provides a preparation method of the oil-soluble hydraulic fracture temporary plugging reorientation agent. The fracture temporary plugging reorientation agent has the characteristics of good oil solubility, adjustable softening point and applicability to deflection fracturing modification of a low-permeability reservoir oil well at different temperatures.

Description

technical field [0001] The invention relates to an oil-soluble temporary plugging diverting agent applicable to hydraulic fracturing of oil and gas wells, and a preparation method of the temporary plugging diverting agent, belonging to the technical field of oil and gas reservoir stimulation. Background technique [0002] Traditional hydraulic fracturing is to form double-wing symmetrical fractures in the reservoir for the purpose of fracturing. However, for low-permeability reservoirs, the stimulation effect of a single fracturing main fracture is limited. It is hoped that multiple interlaced branch fractures will be formed on the basis of the main fracture, so as to open new reservoirs and connect more natural fractures to increase oil drainage. volume. Under this idea, the fracturing temporary plugging and steering technology has been formed. It is in the process of hydraulic fracturing, when the main fracture is formed, the fracturing fluid carries a part of the tempor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/506C09K8/514C09K8/68
CPCC09K8/506C09K8/508C09K8/514C09K8/602C09K8/68C09K8/90C09K2208/08
Inventor 赵众从柳建新
Owner SHAANXI XINGYOU TECH DEV CO LTD
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