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Pre-coated film propping agent, preparation method of the pre-coated film propping agent and sand prevention method adopting the pre-coated film propping agent

A proppant and pre-covering technology, which is applied in the direction of chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve the problems of affecting permeability, large amount of resin, long curing time, etc., and improve the anti-fragmentation ability , Simple construction process, high consolidation strength

Active Publication Date: 2012-09-12
BEIJING QISINTAL SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention solves the problem that the curing temperature of the curable proppant in the prior art is high, and cannot be used when the temperature is lower than 40°C; the curing time is long, the consolidation strength is low, and the sand control effect is poor; and the amount of resin is large, which affects the permeability. To develop a binder system that can cure at room temperature and have high consolidation strength, and a pre-coated proppant that can make the resin-coated proppant achieve high strength and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The preparation method of the pre-coated proppant provided by the present invention includes: heating the proppant to 180-250°C, adding the coupling agent and the pre-coated resin under stirring, and the stirring time is preferably 60±20 seconds, so that the pre-coated Membrane resin and coupling agent cover the proppant; add curing agent and stir; when the material is about to agglomerate, add lubricant and continue stirring until the material is completely dispersed; cool the material to ambient temperature.

[0029] The epoxy resin adhesive provided by the invention, described epoxy resin is liquid bisphenol A type epoxy resin or bisphenol F type epoxy resin, such as bisphenol A type epoxy resin can be selected from commercially available E-56, E-54, E-51, E-44; bisphenol F type epoxy resin can be selected from commercially available brand 6458 resin of Shanghai Xinhua Resin Factory, Yueyang Petrochemical General Factory Epoxy Resin Factory Brand CYDF-170 and CYDF-18...

Embodiment 1

[0033] 1. Preparation of pre-coated quartz sand

[0034] Heat 10kg of natural quartz sand (particle diameter: 0.425-0.85mm) to 210°C and pour it into the sand mixer, add 50g of bisphenol A epoxy resin (grade: E-51) and γ-glycidyl ether propane Add 1 gram of trimethoxysilane and stir for 40 seconds; add 15 grams of diaminodiphenylmethane curing agent and stir, add 2 grams of calcium stearate when the material starts to agglomerate, stir and solidify for 200 seconds, cool and sieve, then Get pre-coated quartz sand.

[0035] 2. Oil and gas well sand control performance test

[0036] Get 250 grams of the above-mentioned pre-coated quartz sand, mix 5 grams of E-51 bisphenol A epoxy resin with 2% of the weight of the coated quartz sand and 2 grams of JA-1S type curing agent with 40% of the weight of the resin, and then add the pre-coated In coated quartz sand, stir evenly. Weigh 50 grams of the sand, put it into a steel pipe with a diameter of 25 mm, one end sealed with a plug an...

Embodiment 2

[0043] 1. Preparation of pre-coated ceramsite

[0044] Heat 10kg of ceramsite (particle diameter: 0.425~0.85mm) to 230°C and pour it into the sand mixer, add 100g of bisphenol A epoxy resin (grade: E-54) and γ-glycidyl ether propyl Stir 1 gram of trimethoxysilane for 50 seconds; add 30 grams of diaminodiphenylmethane curing agent and stir, add 5 grams of calcium stearate when the material starts to agglomerate, stir and solidify for 220 seconds, cool and sieve to obtain Pre-coated ceramsite.

[0045] 2. Oil and gas well sand control performance test

[0046] Take 250 grams of the above-mentioned pre-coated ceramsite, mix 5 grams of E-51 bisphenol A epoxy resin with 2% weight of the coated ceramsite and 2 grams of 810 type curing agent with 40% weight of the resin, and then add the pre-coated ceramsite In the grain, stir well. Prepare sample according to Example 1, keep it warm in a water bath at 25°C for 24 hours, measure its consolidated compressive strength to be 9.5MPa, ...

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PUM

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Abstract

The invention relates to a pre-coated film propping agent, a preparation method of the pre-coated film propping agent and a sand prevention method adopting the pre-coated film propping agent. The pre-coated film propping agent comprises propping agents, one or more pre-coated resins, one or more pre-coating curing agents, a coupling agent and a lubricating agent. The one or more pre-coated resins comprise bisphenol-A epoxy resin, bisphenol-F epoxy resin and / or novolac epoxy resin. The one or more pre-coating curing agents are selected from alicyclic polyamines, aromatic polyamines, modified alicyclic polyamines and / or modified aromatic polyamines. The coupling agent is an organosilane coupling agent.

Description

technical field [0001] The invention relates to the field of sand control in crude oil and natural gas exploitation, in particular to a pre-coated film proppant, a preparation method thereof, and a sand control method using the proppant. Background technique [0002] During the liquid drainage after the hydraulic fracturing operation or the subsequent oil production process, proppant regurgitation and formation sand production often occur. Both proppant and formation sand brought to the surface can erode chokes, valves, and other equipment; another potential hazard of flowback and sand production is the reduction in propped fracture length and width, which reduces proppant conductivity. In order to prevent proppant regurgitation and formation sand, scientific research workers have developed curable resin-coated proppant, which refers to the matrix (such as quartz sand, ceramsite, glass balls and nut shells, etc.) ) on a layer of solid thermosetting resin with cold or hot co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/56C09K8/80C04B26/10C04B14/06C04B14/02E21B43/267
Inventor 张伟民李占刚李宗田朱永刚蒙传幼陈丽
Owner BEIJING QISINTAL SCI & TECH
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