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High-density high-strength fracturing propping agent for oil and gas wells and preparation method thereof

A fracturing proppant, high-strength technology, applied in the field of fracturing proppants, can solve the problems of increasing production costs and unfavorable for large-scale industrial production, and achieve the goal of improving diversion capacity, slowing down the competition of raw materials, and reducing production costs Effect

Inactive Publication Date: 2011-05-18
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN200710191558.2 discloses a method for preparing a high-density and high-strength fracturing proppant, which is characterized in that Al 2 o 3 ≥75% uncalcined bauxite 100 parts, manganese oxide 3-8 parts, zirconia 1-5 parts, the apparent density of the product after pelleting and firing is 3.40-3.55g / cm 3 , the crushing resistance under 86MPa pressure is less than 5% (20 / 40 order), has adopted zirconia as additive in this invention, and this will increase production cost greatly, is unfavorable for large-scale industrial production

Method used

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  • High-density high-strength fracturing propping agent for oil and gas wells and preparation method thereof
  • High-density high-strength fracturing propping agent for oil and gas wells and preparation method thereof
  • High-density high-strength fracturing propping agent for oil and gas wells and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1: Take 75.0wt% Al 2 O 3 , 10.0wt% Fe 2 O 3 And 2.0wt% SiO 2 High-iron bauxite 10Kg, iron oxide powder 0.01Kg, bentonite 0.01Kg, starch 0.01Kg. The bauxite was crushed into blocks of less than 15 cm by a counter-roll crusher, then calcined at 800° C. for 1 hour, and then ground by a ball mill into fine powder with a particle size of less than 200 mesh. Put the above-mentioned raw material powder mixture into a disc ball forming machine, add an appropriate amount of water in batches, and obtain a proppant blank by rotating into a ball. Place the proppant blanks in well-ventilated air to dry naturally, and sieve after drying to remove oversized and undersized particles by filtration. Then put it into a tunnel kiln for sintering at 1390°C, holding for 0.5h, cooling down to obtain a proppant sintered body, and finally grading and sieving to prepare high-density and high-strength 20 / 40 mesh fracturing proppant products. The alumina content of the proppant is 74.8%, t...

Embodiment 2

[0030] Example 2: Take 40.0wt% Al 2 O 3 , 45.0wt% Fe 2 O 3 And 12.0wt% SiO 2 High-iron bauxite 10Kg, bentonite 1.0Kg, starch 0.3Kg, dextrin starch 0.2Kg. The bauxite is crushed into blocks of less than 15 cm by a counter-roll crusher, then calcined at 400° C. for 2 hours, and then ground by a ball mill into fine powder with a particle size of less than 200 mesh. Put the above-mentioned raw material powder mixture into a disc ball forming machine, add an appropriate amount of water in batches, and obtain a proppant blank by rotating into a ball. The proppant blank is dried at 70°C, dried and then sieved, and filtered to remove oversized and undersized particles. Then put it into a tunnel kiln for sintering at 1200°C, heat preservation for 2 hours, and after cooling down, the proppant sintered body is obtained, and finally sieved through classification to prepare high-density and high-strength 20 / 40 mesh fracturing proppant products. The alumina content of the proppant is 41.2%,...

Embodiment 3

[0031] Example 3: Take 40.0wt% Al 2 O 3 , 35.0wt% Fe 2 O 3 And 20.0wt% SiO 2 High-iron bauxite 10Kg, iron oxide powder 1.5Kg, clay 1.0Kg, dextrin 0.5Kg. The bauxite is crushed into blocks of less than 15 cm through a jaw crusher, and then ground into fine powder with a particle size of less than 200 mesh through Raymond mill. Put the above-mentioned raw material powder mixture into a high-speed ball forming machine, add an appropriate amount of water in batches, and obtain a proppant blank by rotating into a ball. Dry the proppant blank at 150°C, sieving after drying, and filter to remove oversized and undersized particles. Then it is put into a rotary kiln and sintered at 1510°C, kept for 1 hour, and cooled to obtain a proppant sintered body. Finally, it is classified and screened to prepare high-density and high-strength 20 / 40 mesh fracturing proppant products. The alumina content of the proppant is 41.0%, the iron oxide content is 43.0%, and the bulk density is 1.88g / cm 3 ,...

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Abstract

The invention relates to a high-density high-strength fracturing propping agent for oil and gas wells and a preparation method thereof, belonging to the field of fracturing propping agents for oil. The high-density high-strength fracturing propping agent comprises alumina with content of not more than 75 percent by weight and iron oxide with the content of not less than 10 percent by weight; and the broken rate of a product with apparent density of not less than 3.35 g / cm<3> and a grain diameter of 20 / 40 meshes or a smaller grain diameter is less than 5 percent under the pressure of 69 MPa. The preparation method of the fracturing propping agent comprises the following steps of: selectively adding one or a composite of more of the iron oxide and manganese oxide as an auxiliary material bytaking high iron bauxite containing Al2O3 with the content of not less than 40 percent by weight and not more than 75 percent by weight, Fe2O3 with the content of not less than 10 percent by weight and not more than 50 percent by weight and SiO2 with the content of not less than 2 percent by weight and not more than 20 percent by weight (content corresponding to dewatered clinker aggregates) as main raw materials; crushing, calcining or grinding without calcining, and then adding a right amount of plastic agents and cementing agents; adding water to a granulated ball forming mill to rotate into balls so as to form a propping agent haydite biscuit; and then drying and sintering so as to prepare the high-density high-strength fracturing propping agent.

Description

Technical field [0001] The invention relates to a high-density and high-strength oil and gas well fracturing proppant and a preparation method thereof, and belongs to the field of fracturing proppants. Background technique [0002] Fracturing proppant is a solid particulate material used to support fractures in underground rock formations during oil and natural gas extraction. Natural quartz sand and artificial ceramsite are currently the most commonly used oil and gas well fracturing proppants. Due to the wide resource distribution and low price, quartz sand is widely used in oil and gas fracturing. However, quartz sand has low strength and sphericity, which determines that it cannot be used for pressure in deep oil and gas wells under high pressure conditions. Crack mining. Since the 1990s, many countries have successively developed a series of artificial ceramsites according to the characteristics of their respective raw material resources. They have much higher strength, de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
Inventor 丁书强
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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