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Preparation method of microsphere for detonation of blasting in oil field layer

A sphere and oil field technology, applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problems of reliability discount, unsatisfactory ignition and detonation ignition performance, etc., to increase the ignition area and deflagration. The success rate and percentage of suspension charge burning are improved, and the effect of improving ignition efficiency

Active Publication Date: 2013-04-03
西安石油大油气科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] But generally speaking, its detonation, detonation and ignition performance is still not ideal, and its reliability is greatly reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Take raw material by following mass percentage: potassium chlorate 44%, potassium perchlorate 6%, ammonium nitrate 4%, sulfur powder 36%, nitrocellulose 9%, aluminum powder (particle size is below 10 μ m) 0.5%, magnesium powder (particle size less than 10 μm) 0.5%, the raw materials weighed are mixed uniformly to obtain powder;

[0035] (2) Take part of the medicinal powder described in step (1), and add collodion acetone solution therein, stir it into a ball and force it to sieve with a non-metallic scraper, then sieve, and take a particle size of 0.42mm as qualified The product is dried; the addition of the collodion acetone solution is 20% of the volume of the powder used, and the mass percentage content of the collodion in the collodion acetone solution is 7%;

[0036] (3) Place the qualified product after drying in the step (2) in the sugar coating machine, spray the shellac ethanol solution in 15 times, and sprinkle the medicated powder described in the step (...

Embodiment 2

[0042] (1) Take the raw materials by the following mass percentages: 56% of potassium chlorate, 5% of potassium perchlorate, 5.5% of ammonium nitrate, 25% of sulfur powder, 7% of nitrocellulose, 1% of aluminum powder (with a particle size below 10 μm), magnesium powder (with a particle size of less than 10 μm) 0.5%, the raw materials weighed are mixed uniformly to obtain powder;

[0043] (2) Take part of the powder described in step (1), and add collodion acetone solution therein, stir it into a ball and force it to sieve with a non-metallic scraper, then sieve, and take a particle size of 1.19mm as qualified The product is dried; the add-on of the collodion acetone solution is 30% of the volume of the medicinal powder used, and the mass percentage content of the collodion in the collodion acetone solution is 5%;

[0044] (3) Place the qualified product after drying in the step (2) in the sugar coating machine, spray the shellac ethanol solution in 20 times, and sprinkle the m...

Embodiment 3

[0050] (1) Take raw material by following mass percentage: potassium chlorate 48%, potassium perchlorate 10%, ammonium nitrate 8%, sulfur powder 25%, nitrocellulose 7%, aluminum powder (particle size is below 10 μ m) 1%, magnesium powder (particle size less than 10 μm) 1%, the raw materials weighed are mixed uniformly to obtain powder;

[0051] (2) Take part of the medicinal powder described in step (1), and add collodion acetone solution therein, stir it into a ball and force it to sieve with a non-metallic scraper, then sieve, and take a particle size of 0.8mm as qualified The product is dried; the add-on of the collodion acetone solution is 25% of the volume of the medicinal powder used, and the mass percentage content of the collodion in the collodion acetone solution is 2%;

[0052] (3) Place the qualified product after drying in the step (2) in the sugar coating machine, spray the shellac ethanol solution in 18 times, and sprinkle the medicated powder described in the st...

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Abstract

The invention discloses a preparation method of a microsphere for detonation of blasting in an oil field layer. The method comprises the following steps of: evenly mixing raw materials to obtain powder; then adding a collodion acetone solution in partial powder, stirring and agglomerating, and then carrying out forced screening to obtain a qualified product; subsequently, placing the qualified product in a sugar-coating machine, spraying a lac ethanol solution, scattering the powder so that the qualified product rounds as a ball and is enlarged, and screening to obtain a semi-finished product; placing the semi-finished product in the sugar-coating machine, spraying the collodion acetone solution, scattering the powder so that the semi-finished product rounds as a ball and is enlarged, andscreening to obtain a qualified semi-finished product; and placing the qualified semi-finished product in the sugar-coating machine for primary cladding and cladding, and drying to obtain the microsphere with the particle size of 1mm-3mm. The microsphere prepared by the method of the invention is easily transported in the rock seam at the bottom of an oil well; the detonation blasting effect of the microsphere is good, and the success rate of the ignition reaches 100%, thereby effectively improving the oil-production efficiency of the oil field; and the microsphere is safe and reliable and has low cost.

Description

technical field [0001] The invention belongs to the technical field of explosive preparation, and in particular relates to a method for preparing microspheres used for explosion initiation in oil field layers. Background technique [0002] The oil reserves of low-permeability oil reservoirs in my country are very considerable, and the geological reserves of newly proven low-permeability oil fields are several billion tons, accounting for about 1 / 4 of my country's total oil reserves. Low-permeability reservoirs are usually developed by vertical wells and vertical infill wells, water injection development and horizontal well development. Vertical wells and vertical infill wells are developed using formation energy, and the recovery rate is low. Water injection development and fracturing development are relatively common development schemes for most low-permeability reservoirs at present, which need to increase the number of wells drilled and the number of oil layer stimulatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/263
Inventor 廖红伟张杰胡继国郑宝林
Owner 西安石油大油气科技有限公司
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