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Method for preparing film-coated ceramisite proppant by using oil shale wastes

A technology of oil shale slag and proppant, which is applied in the direction of chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve the problems of soil and environmental hazards, occupy large land, etc., and achieve the elimination of environmental hazards, cost reduction effect

Inactive Publication Date: 2010-12-08
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main component of oil shale slag is SiO 2 、Al 2 o 3 , Fe 2 o 3 , MgO, CaO, SO 3 etc.; if the oil shale slag is discarded, it will occupy a large amount of land and cause harm to the soil and the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for preparing film-coated ceramsite proppant by utilizing oil shale slag, it comprises the steps:

[0035] 1) Selection of raw materials: according to the mass fractions of each raw material: 50 parts, 50 parts of bauxite, 2 parts of binder, choose oil shale slag, bauxite and binder, for subsequent use; The particle diameter of oil shale slag is 40 orders; Described bauxite is natural bauxite powder, and its particle diameter is 40 orders; Described binding agent is ρ-alumina (ρ-Al 2 o 3 );

[0036] 2) uniformly mixing oil shale slag, bauxite and binder to obtain a mixture;

[0037] 3) Put the mixed material into a pan granulator for granulation, add water by spraying method, the amount of water added is 15% of the weight of the mixed material, and obtain raw meal pellets;

[0038] 4) Sintering the prepared raw meal balls at 1300° C. for 1 hour to obtain ceramsite aggregate;

[0039] 5) Put 100kg of ceramsite aggregate into the sand mixer for stirring, firs...

Embodiment 2

[0042] A method for preparing film-coated ceramsite proppant by utilizing oil shale slag, it comprises the steps:

[0043] The preparation of ceramsite aggregate is with embodiment 1;

[0044] Put 100kg of ceramsite aggregate into the sand mixer for stirring, first heat to 240°C, then cool down to 180°C, add 4kg of phenolic resin and stir evenly, then add 0.4L of curing agent triethylenetetramine to make the resin mold To solidify, add 0.25kg of lubricant calcium stearate and stir evenly before the resin starts to solidify and agglomerate, and finally cool, crush, and pass through a 20 / 40 mesh sieve to obtain high-strength and low-density coated ceramsite Proppant.

[0045] Through experimental verification, the bulk density of the obtained film-coated ceramsite proppant is 1.37g / cm 3 , the apparent density is 2.41g / cm 3 , The broken rate is 7.61%, the bulk density and apparent density are small, and the strength meets the requirements of national standards.

Embodiment 3

[0047] A method for preparing film-coated ceramsite proppant by utilizing oil shale slag, it comprises the steps:

[0048] 1) Selection of raw materials: according to the mass fractions of each raw material: 50 parts of oil shale slag, 50 parts of bauxite, 1 part of binder, select oil shale slag, bauxite and binder, and reserve ; The bauxite is natural bauxite powder, its particle size is less than 200 mesh; the binder is silica sol;

[0049] 2) uniformly mixing oil shale slag, bauxite and binder to obtain a mixture;

[0050] 3) put the mixed material into a disc granulator for granulation, add water by spraying method, the amount of water added is 10% of the mixed material mass, and obtain raw meal pellets;

[0051] 4) Sintering the prepared raw material balls at 1200° C., holding time for 30 minutes to obtain ceramsite aggregate;

[0052] 5) Put 100kg of ceramsite aggregate into the sand mixer for stirring, first heat to 240°C, then cool down to 185°C, add 6kg of phenolic ...

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Abstract

The invention relates to a method for preparing a film-coated ceramisite proppant by using oil shale wastes. The method for preparing the film-coated ceramisite proppant by using the oil shale wastes is characterized by comprising the following steps of: 1) selecting raw materials which comprise the following raw materials in part by mass: 50 parts of the oil shale wastes, 50 parts of bauxite, and 1 to 4 parts of caking agent; 2) uniformly mixing the raw materials to obtain a mixture; 3) putting the mixture into a pan-type pelletizer for pelletizing to obtain raw material balls; 4) sintering the raw material balls to obtain a ceramisite aggregate; and 5) heating the ceramisite aggregate to the temperature of between 100 and 240 DEG C, adding a resin into the heated ceramisite aggregate and stirring the mixture uniformly first to ensure that the resin forms a film on the surface of the ceramisite aggregate, then adding a curing agent and other auxiliary agents, stirring the mixture uniformly, adding a lubricating agent, stirring the mixture uniformly, cooling to obtain a new mixture, crushing the new mixture and screening the crushed mixture through a 20 / 40-mesh sieve to obtain thefilm-coated ceramisite proppant. The method can extensively use the oil shale wastes and can solve the problem that the oil shale wastes harm the environment.

Description

technical field [0001] The invention relates to a method for preparing a film-coated ceramsite proppant by utilizing oil shale slag, and belongs to the field of proppant production. Background technique [0002] When hydraulic fracturing is performed in oil and gas fields, a large amount of petroleum proppant is needed to fill the fractures in the oil layer, so that the crude oil around the oil well can enter the bottom of the oil well through the pores of the petroleum proppant, thereby increasing the oil production capacity of the oilfield. During hydraulic fracturing, the viscosity of fracturing equipment and fracturing fluid has a very important relationship with the density of petroleum proppant; when the bulk density of proppant is smaller, the hydraulic fracturing process has a greater impact on fracturing equipment and fracturing fluid. The requirements are also smaller, which will greatly reduce the cost of fracturing. [0003] Petroleum proppants are generally div...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80C04B35/01C04B41/83B09B3/00
CPCC09K8/805
Inventor 马睿栾英伟赵俊严春杰雷新荣
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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