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Method and technique for preparing low-density propping agent

A preparation process and proppant technology, which is applied in the field of low-density proppant preparation, can solve the problems of high construction cost and complicated preparation process, and achieve the effects of improving deformation resistance, high strength, and not easy to evacuate cracks

Inactive Publication Date: 2008-06-18
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no good process preparation method for this type of proppant at present, and the usual preparation process is complicated and the construction cost is high

Method used

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  • Method and technique for preparing low-density propping agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Take 50 grams of walnut shell particles that have been crushed and ground into 20-40 meshes and placed in a pressure vessel;

[0042] Prepare an ethanol solution of thermosetting phenolic resin with a content of 60%, and immerse the particles in the solution; close the pressure vessel, raise the temperature to 50°C-60°C, add nitrogen pressure to 1Mpa, and maintain it at 50°C-60°C for 2 hours; filter off the excess resin solution , heat up to 150°C to 180°C for curing;

[0043] Add 5 grams of epoxy resin and 0.5 grams of polyethylene polyamine into the container, stir and heat up to 120°C for curing;

[0044] The particles are taken out and sieved with a 20-40 mesh vibrating sieve, and the particles on the sieve are crushed and sieved again. Make its bulk density 0.65g / cm 3 ~1.10g / cm 3 , the true density is 1.10g / cm 3 ~1.50g / cm 3 .

[0045] See Figure 1 and Figure 3 for flow conductivity and deformation resistance.

Embodiment 2

[0047] Take 50 grams of walnut shell particles that are crushed and ground into 20-40 meshes and placed in a container;

[0048] Prepare an ethanol solution of thermosetting phenolic resin with a solid content of 60%, immerse the particles in the solution; close the container, raise the temperature to 50°C to 60°C, maintain it at 50°C to 60°C for 2 hours, filter off the excess resin solution, and heat up to 150°C to 150°C Curing at 180°C;

[0049] Cool to below 80°C, add 5 grams of epoxy resin and 0.5 grams of polyethylene polyamine solution mixed evenly into the container, stir and heat up to 120°C to solidify;

[0050] The particles are taken out and sieved with a 20-40 mesh vibrating sieve, and the particles on the sieve are crushed and sieved again. Make its bulk density 0.65g / cm 3 ~1.10g / cm 3 , the true density is 1.10g / cm 3 ~1.50g / cm 3 .

[0051] See Figure 2 and Figure 3 for the conductivity and deformation resistance.

Embodiment 3

[0053] Take 50 grams of walnut shell particles that have been crushed and ground into 20-40 meshes and placed in a pressure vessel;

[0054] Prepare an acetone solution of epoxy resin or phenolic resin with a solid content of 60%, and immerse the particles in the solution; close the pressure vessel, raise the temperature to 50°C-60°C, add nitrogen pressure to 1Mpa, and maintain at 50°C-60°C 2h; filter off excess resin solution, heat up to 150°C-180°C for curing;

[0055] Add 5 grams of phenolic resin and 0.5 grams of polyethylene polyamine into the container, stir and heat up to 120°C for curing;

[0056] The particles are taken out and sieved with a 20-40 mesh vibrating sieve, and the particles on the sieve are crushed and sieved again. Make its bulk density 0.65g / cm 3 ~1.10g / cm 3 , the true density is 1.10g / cm 3 ~1.50g / cm 3 .

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Abstract

The present invention relates to propping agent which is widely applied to the oil and gas well hydraulic fracturing technology, and the present invention especially relates to a manufacturing method and a preparation technology of low-consistency propping agent and is characterized in that firstly, plant fibre material is used as the raw material and is crushed and grinded as plant fibre granules; secondly, modifying agent solution dips and solidifies the plant fibre granules; thirdly, macromolecular resin is used to covering the granules which are crushed and filtered again to form the propping agent. The propping agent prepared by the technology and method can conquers that the prior propping agent has large energy consumption and high expense of the whole construction, or the propping agent of the present invention does not easily cause the phenomena of propping agent disgorging or crack emptying.

Description

technical field [0001] The invention relates to a proppant widely used in the hydraulic fracturing technology of oil and gas wells, in particular to a preparation method and process of a low-density proppant. Background technique [0002] Using artificial methods to inject fluid into the rock base, with a pressure exceeding the fracture strength of the formation, cracks will be formed in the formation around the wellbore to form a channel with high conductivity, and the oil and gas recovery rate will be improved. In order to keep the fractures formed after fracturing open and oil and gas products to pass through smoothly, it is necessary to inject round particles with a certain strength. A proppant is a solid particle used to support a fracture without reclosing it. [0003] In the hydraulic fracturing operation of oil and gas wells, an important issue is to select a suitable proppant to support fractures. The ideal proppant should have the following characteristics: (1) l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 孙虎汪义发曹欣谢璇万华徐迎新高红萍
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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