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Ultralight-weight proppant and preparation method thereof

An ultra-light and proppant technology, which is applied in the direction of earthwork drilling, mining fluid, wellbore/well components, etc., can solve the problems of high energy consumption and high density of ceramsite proppant, and achieve the effect of reducing energy consumption

Active Publication Date: 2011-07-20
BEIJING QISINTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of excessive density of ceramsite proppant and high energy consumption in production, and to provide an ultra-light resin-coated ceramsite proppant with stable quality and high strength, which is suitable for deep oil and gas with high closure pressure Well fracturing proppant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: 0.6 kilograms of coal gangue, 2.5 kilograms of fly ash, 2.0 kilograms of clay and 2.0 kilograms of bauxite were put into a disc-type ball forming machine and mixed for 30 minutes to make it evenly mixed; the mass percentage concentration of slow injection was Rotate 0.08% hydroxypropyl cellulose aqueous solution into balls, sieve out raw material particles with a diameter of 425-850 μm, dry them at 100-200°C, put them into a crucible, and gradually heat up in a muffle furnace, at 1200-1250 Roasted at ℃ for 3 hours, measured its bulk density after cooling to 1.24g / cm 3 , apparent density 1.98g / cm 3 , The broken rate is 8.7% under the condition of 28MPa.

Embodiment 2

[0023] Embodiment 2: 0.8 kilograms of coal gangue, 3.5 kilograms of fly ash, 2.0 kilograms of clay and 1.0 kilograms of bauxite were put into a disc-type ball forming machine and mixed for 30 minutes to make it evenly mixed; the mass percentage concentration of slow injection was Rotate 0.1% water glass solution into balls, sieve out raw material particles with a diameter of 425-850 μm, dry them at 100-200 °C, put them into a crucible, gradually heat up in a muffle furnace, and roast at 1150-1200 °C for 3 Hour. The density of its ceramsite was measured to be 119g / cm 3 , apparent density 1.89g / cm 3 , The broken rate is 13.3% under the condition of 28MPa.

Embodiment 3

[0024] Embodiment 3: Cardanol modified phenolic resin is synthesized: 846 grams of phenol, 300 grams of cardanol and 973 grams of 37% formaldehyde solution are added respectively in a 3000 milliliter four-necked flask and stirred, and the pH of the solution is adjusted at about 8 to 10 with ammonia , heat up to 70°C, start timing heat preservation reaction, keep warm at 70-90°C for 2.5 hours, cool down to 55°C, vacuumize and dehydrate, when the water content in the resin is less than 25%, stop vacuuming and pack.

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Abstract

The invention relates to an utralight-weight proppant and a preparation method thereof, belonging to the field of fracturing extraction of oil and gas wells. The preparation method of the utralight-weight proppant comprises the following steps: sintering 1-50 parts by weight of fly ash, 0.5-20 parts by weight of coal gangue, 20-50 parts by weight of clay and 10-30 parts by weight of bauxite whichare used as aggregate, and balling, thereby obtaining the utralight-weight haydite. The utralight-weight proppant provided by the invention utilizes industrial waste, and the production can be easilycontrolled; the sintering temperature is greatly lowered, ranging 1100-12500 DEG C; and the energy consumption is effectively lowered, and the energy can be saved by 20%. The percentage of damage of the utralight-weight proppant under 69 MPa is lower than 5%, the volume density is lower than 1.25g / cm<3>, and the apparent density is lower than 2.0g / cm<3>, so the utralight-weight proppant can completely substitute medium-density haydite.

Description

technical field [0001] The invention relates to the field of oil and natural gas fracturing exploitation, in particular to an ultra-light proppant and a preparation method thereof. Background technique [0002] Fracturing stimulation is an important technology for oil and natural gas well production stimulation. Proppant is the key material in fracturing construction. The proppant is brought into and supported by the fracturing fluid in the fractures of the fracturing formation, thereby effectively introducing oil and gas into oil and gas wells, greatly increasing oil and gas production and prolonging the life of oil and gas wells. [0003] Currently commonly used fracturing proppants include quartz sand, ceramsite, and resin-coated particles. Among them, the price of quartz sand is the cheapest, its relative density is low, and it is convenient for construction and pumping, but the strength of quartz sand is low, its sphericity is poor, and its breakage rate is high, whic...

Claims

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Application Information

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IPC IPC(8): C09K8/80
Inventor 张伟民李宗田龙秋莲崔颜立刘洪庭李军
Owner BEIJING QISINTAL SCI & TECH
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