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Preparation method of self-suspension proppant for natural hydrofracturing construction

A self-suspension and water fracturing technology, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc., can solve the problems of oil production decline, polymer compound, drag-reducing water viscosity increase, unfavorable flowback, etc. , to achieve the effects of enhancing mechanical properties, reducing pollution, and small friction

Inactive Publication Date: 2015-09-30
BEIJING RECHSAND SCI & TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But on the other hand, the polymer compound used in the drag reduction water enters the formation along with the clear water, and the viscosity of the drag reduction water increases, which consumes a lot of pump power during flowback, which is not conducive to all flowback; The polymer compound blocks the pores of the formation, resulting in a decrease in oil output, and the polymer compound seeps into the groundwater through the formation gap, causing water pollution

Method used

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  • Preparation method of self-suspension proppant for natural hydrofracturing construction
  • Preparation method of self-suspension proppant for natural hydrofracturing construction
  • Preparation method of self-suspension proppant for natural hydrofracturing construction

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Embodiment 1

[0029] 1) Use 1000g of quartz sand (river sand) as the raw material. After scrubbing and drying, the sand contains no water at all. Screen the 20-40 mesh quartz sand as the aggregate (the pretreatment process of the quartz sand in the following examples is the same);

[0030] 2) Epoxy resin E-55, mixed with ethyl acetate at a ratio of 1:1. Stir evenly to prepare 50mL of binder solution, then add aggregate and 10g of guar gum to the binder solution.

[0031] 3) After the mixture obtained in step 2) was dried at 80° C. for 2 hours, it was sieved.

[0032] The obtained proppant is particles with a particle diameter of 20-40 mesh, and the surface of the aggregate is coated or partially coated with guar gum polymer material.

Embodiment 2

[0034] 1) Take 1kg of quartz sand (eolian sand) of 40-70 mesh as the aggregate and set aside;

[0035] 2) Epoxy resin E-51, mixed with ethyl formate at a ratio of 1:1. Stir evenly to prepare 50mL of binder solution, then add aggregate and 10g carboxymethyl guar gum to the binder solution.

[0036] 3) The mixture obtained in step 2) was dried at 80° C. for 4 hours, and then sieved.

Embodiment 3

[0038] 1) Take 30-50 mesh 1kg quartz sand (sea sand) and sintered alumina as aggregates, the particle size of the two materials is the same, the weight ratio is 8:2, and set aside;

[0039] 2) 8g of resole phenolic resin, add 20g of ethanol. Stir evenly, then add aggregate and 10g polyacrylamide to the binder solution.

[0040] 3) After the mixture obtained in step 2) is dried naturally, it is sieved.

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Abstract

The invention provides a preparation method of a self-suspension proppant for natural hydrofracturing construction, which comprises the following steps: by using 6-200-mesh granules as aggregate, adding an adhesive solution accounting for 10-30 wt% of the aggregate into the aggregate, and adding a water-soluble high polymer material accounting for 0.1-5 wt% of the aggregate; and stirring uniformly, drying and screening. The optimal selection of the raw materials and technological conditions greatly enhances the mechanical properties of the proppant. The obtained proppant has the advantages of small friction resistance and high strength, can be suitable for high-temperature conditions, and can be easily recovered; and the used coating material can not cause environmental pollution.

Description

technical field [0001] The invention belongs to the field of fluid mineral exploitation such as oil, natural gas and shale gas, and in particular relates to a proppant for strengthening cracks through propping and a preparation method thereof. Background technique [0002] The existing propped fracturing technology mainly includes the use of proppant and fracturing fluid (active water, linear glue or jelly). The fracturing fluid and proppant are two independent systems, and the fracturing fluid flows at high speed. The proppant is suspended using turbulent flow. Commonly used proppants are quartz sand or ceramsite. However, when the proppant reaches the fracture, the proppant quickly settles at the bottom of the fracture due to a large drop in fluid velocity. Add high molecular weight polysaccharides composed of mannose and galactose, or guar gum derivatives, or cellulose derivatives, or biopolymers, such as xanthan gum, diphenylmethane, and scleroglucan, to the fracturing...

Claims

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Application Information

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IPC IPC(8): C04B26/12C04B26/14C09K8/80C04B14/06C04B14/22
Inventor 秦升益胡文进王中学胡炜
Owner BEIJING RECHSAND SCI & TECH GRP
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