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Polystyrene propping agent and preparation and application thereof

A technology of polystyrene and proppant, which is applied in the fields of mining fluid, wellbore/well parts, earthwork drilling and production, etc. It can solve the problems of low roundness and sphericity, large specificity, high fluid viscosity, etc., and achieve high temperature resistance and Low compression resistance, high roundness and sphericity, and excellent thermal stability

Active Publication Date: 2014-08-06
王文军 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional proppants are glass balls, metal balls, quartz sand, ceramsite and other inorganic substances or their coatings. These proppants generally have the following disadvantages: 1. The specificity is large, all of which are above 2.0, resulting in transmission during fracturing. The proppant has high fluid viscosity, high pump pressure and high energy consumption; 2. The roundness and sphericity are low, the surface is not smooth, and the equipment is severely worn; 3. It is easy to break, causing the cracks to close prematurely and affecting the production; 4. The surface is covered with a film, which is prone to adhesion and blockage of the pipeline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Carbon black modification: mix 4g of carbon black, 8g of sodium dodecylbenzenesulfonate, and 200g of deionized water, stir at 80°C for 8 hours, vacuum filter and wash with water several times, filter until mud cake-like bags are sealed and stored for later use .

[0034] Preparation of black cross-linked polystyrene microspheres: Add 2.8 g of surfactant sodium dodecylbenzene sulfonate, 400 mL of deionized water, and 7 g of inorganic dispersant active calcium phosphate into a reaction kettle, and stir mechanically for 20 min at a speed of 160 rpm. 1 g of modified carbon black and 40 mL of deionized water were ultrasonically dispersed for 60 min, added to the reaction kettle, and stirred for 60 min. Add 2 g of benzoyl peroxide initiator, 90 g of styrene, and 10 g of divinylbenzene into the reaction kettle after mixing, and keep stirring at a speed of 160 rpm for 10 min, so that the modified carbon black enters the monomer from the water phase. Slowly raise the temperatur...

Embodiment 2

[0037] Carbon black modification: mix 4g of carbon black, 6g of sodium dodecylbenzenesulfonate, and 220g of deionized water, stir at 80°C for 8 hours, vacuum filter and wash with water several times, filter until mud cake-like bags are sealed and stored for later use .

[0038] Preparation of black cross-linked polystyrene microspheres: Add 2.5 g of surfactant sodium dodecylbenzene sulfonate, 350 mL of deionized water, 6 g of inorganic dispersant active calcium phosphate into a reaction kettle, and stir mechanically for 20 min at a speed of 170 rpm. 0.8 g of modified carbon black and 40 mL of deionized water were ultrasonically dispersed for 50 min, added to the reaction kettle, and stirred for 60 min. Add 1.6g of initiator peroxy(2-ethyl)hexanoic acid tert-butyl group, 92g of styrene, 8g of divinylbenzene, 3g of toughening agent triisopropoxypraseodymium, mix them and add them into the reaction kettle, keep the speed at 170rpm Stir for 10 minutes to make the modified carbon ...

Embodiment 3

[0041] Carbon black modification: Mix 4g of carbon black, 6g of sodium dodecylbenzenesulfonate, and 180g of deionized water, stir at 90°C for 9 hours, vacuum filter and wash several times with water, filter until mud cake-like bags are sealed and stored for later use .

[0042] Preparation of black cross-linked polystyrene microspheres: Add 1.3 g of sodium dodecylbenzenesulfonate as a surfactant, 300 mL of deionized water, and 4 g of activated calcium phosphate as an inorganic dispersant into a reaction kettle, and stir mechanically for 20 min at a speed of 200 rpm. 0.2 g of modified carbon black and 20 mL of deionized water were ultrasonically dispersed for 60 min, added to the reaction kettle, and stirred for 40 min. Initiator benzoyl peroxide and tert-butyl peroxide (2-ethyl) hexanoate mixture 1.2g, styrene 96g, divinylbenzene 4g, toughening agent triisobutoxy holmium 3g, add after mixing In the reaction kettle, keep stirring at a speed of 200 rpm for 20 minutes, so that the...

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PUM

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Abstract

The invention relates to the field of organic polymer materials, in particular to a polystyrene propping agent and a preparation and application thereof. The invention aims to provide the polystyrene organic polymer propping agent which can achieve the purpose of increasing oil-gas well output and prolonging oil-gas well fracturing usable life through changing the composition of the propping agent. The propping agent comprises the following components in parts by weight: 100 parts of monomer, 0.11-8 parts of an initiator, 2-10 parts of an inorganic dispersing agent, 2-7 parts of an organic dispersing agent, 0.2-1 part of a reinforcing agent, 200-500 parts of deionized water, and 0.8-3 parts of a surface active agent, wherein the monomer is phenethylene or a mixture of phenethylene and divinylbenzene. The polystyrene propping has the advantages of low specific gravity, no electrostatic, less probability of smashing, low cost, no pollution and the like.

Description

technical field [0001] The invention relates to the field of organic polymer materials, in particular to a polystyrene proppant and its preparation method and application. Background technique [0002] At present, in the field of oil and gas drilling, fracturing technology is widely used. Fracturing technology is not only widely used in low-permeability oil and gas reservoirs, but also has achieved obvious results in the stimulation of medium and high-permeability oil and gas reservoirs. It is to inject high-pressure fluid into the well after drilling to suffocate high pressure at the bottom of the well. When the pressure is greater than the in-situ stress near the well wall and the tensile strength of the formation rock, cracks will be generated in the formation near the bottom of the well, and the injection with proppant will continue. After the well is shut in, the fractures are closed on the proppant, so that a fracture filled with proppant with a certain geometric size...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F212/36C08K9/04C08K3/04C08K3/36C08K3/38C09K8/80
Inventor 王文军宋海韬张百平柳青
Owner 王文军
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