Water suspensible propping agent for oil and gas well fracturing and preparation method thereof

A technology of proppant and coupling agent, which is applied in the field of suspendable proppant in fracturing water and its preparation, can solve the problems affecting the performance of water-swellable polymers, increase the volume of proppant, and have no expansibility, etc., to achieve increased Large volume, improved flow conductivity, complete gel breaking effect

Active Publication Date: 2017-05-17
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the following problems in the above-mentioned prior art: the self-suspending proppant or the hydrogel layer on the surface of the proppant is easily separated from the proppant body during the fracturing stirring process, and the volume of the proppant cannot be increased to achieve For the purp

Method used

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  • Water suspensible propping agent for oil and gas well fracturing and preparation method thereof
  • Water suspensible propping agent for oil and gas well fracturing and preparation method thereof
  • Water suspensible propping agent for oil and gas well fracturing and preparation method thereof

Examples

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Example Embodiment

[0042] Example 1

[0043] Sulfonate polyester polyol synthesis example 1: Sodium dimethyl isophthalate sulfonate 11.1 kg, isophthalic acid 18.7 kg, diethylene glycol 15.9 kg, and triethylene glycol 27.0 kg Add 50 grams of zinc acetate and 50 grams of zinc acetate to the reaction kettle, protect it with nitrogen, heat to 120°C and start stirring, heat to 140-160°C for one hour, gradually heat up to 170°C, and keep it at 170-175°C. When the acid value is less than 90mgKOH / g and when the reactants are completely clear and transparent, cool down to 140°C, add 22.2 kg of phthalic anhydride and 0.67 kg of trimethylolpropane, heat up to 140~160°C for one hour, gradually increase the temperature to 190°C, and control the internal temperature during the heating process Do not exceed 103°C and keep at 190-200°C. When the acid value is less than 60mgKOH / g, vacuum until the acid value drops below 1mgKOH / g to obtain sulfonate polyester polyol with a hydroxyl value of 46.2mgKOH / g.

Example Embodiment

[0044] Example 2

[0045] Synthesis Example 2: Sodium isophthalic acid sulfonate 13.4 kg, phthalic anhydride 14.8 kg, diethylene glycol 16.9 kg, triethylene glycol 32.0 kg and dibutyl tin oxide Add 28 grams to the reaction kettle, pass nitrogen protection, heat up to 120°C and start stirring, heat to 140~160°C for one hour, gradually heat up to 170°C, keep at 170~175°C, and cool down when the acid value is less than 90mgKOH / g When it reaches 160℃, add 22.2 kg of phthalic anhydride and 2.6 kg of trimethylolpropane, heat up to 140~160℃ for one hour, gradually increase the temperature to 190℃, and control the internal temperature not to exceed 103℃ during the heating process, at 190~200℃ Keep warm, when the acid value is less than 60mgKOH / g, vacuumize until the acid value drops below 1mgKOH / g to obtain the sulfonate polyester polyol with a hydroxyl value of 57.6mgKOH / g.

Example Embodiment

[0046] Example 3

[0047] Sulfonate polyester polyol synthesis example 3: 22.2 kg sodium dimethyl isophthalate sulfonate, 11.1 kg phthalic anhydride, 33.75 kg triethylene glycol, 45.0 kg polyethylene glycol and 56 g zinc acetate Add to the reactor, protect by nitrogen, heat to 120℃ and start stirring, heat to 140~160℃ and keep for one hour, gradually increase to 170℃, keep at 170~175℃, when the acid value is less than 90mgKOH / g, cool to 160 ℃, add 22.2 kg of phthalic anhydride and 5.4 kg of trimethylolpropane, increase the temperature to 140~160℃ for one hour, gradually increase the temperature to 190℃, control the internal temperature not to exceed 103℃ during the heating process, keep it at 190~200℃, When the acid value is less than 60mgKOH / g, vacuumize until the acid value drops to 1mgKOH / g to obtain a sulfonate polyester polyol with a hydroxyl value of 52.1mgKOH / g.

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Abstract

The invention relates to a water suspensible propping agent for oil and gas well fracturing and a preparation method thereof. The water suspensible propping agent of the invention comprises a propping agent aggregate, an expansion layer and an interfacial transition layer arranged between the aggregate and the expansion layer, wherein the expansion layer comprises hydrogel dry powder and a binder for bonding the hydrogel dry powder and is swollen in water; and the interfacial transition layer comprises epoxy resin and/or thermoplastic phenolic resin as the interfacial transition layer resin.

Description

technical field [0001] The invention relates to the field of oil and gas well fracturing stimulation, in particular to a suspendable proppant in fracturing water and a preparation method thereof. Background technique [0002] Fracturing is one of the main measures to increase the production of oil and gas wells. It uses high-pressure pumps to inject fracturing fluid into the formation to expand the fractures in the formation, create new fractures and fill them with proppant, thereby increasing the permeability of the formation. Proppants and fracturing fluids are necessary materials for fracturing. [0003] At present, the conventional proppants on the market are mainly ceramsite and quartz sand. The ceramsite proppant has high crush resistance (52MPa fracture rate is generally less than 5%), good sphericity, strong flow conductivity, but relative density Larger, requiring higher fracturing fluid viscosity, more difficult construction, more severe wear and tear on pumps and...

Claims

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Application Information

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IPC IPC(8): C09K8/80
CPCC09K8/80
Inventor 张伟民朱永刚蒙传幼沈雅婷
Owner PETROCHINA CO LTD
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