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Preparation method of self-suspension proppant and prepared proppant

A technology of self-suspension and proppant, which is applied in the direction of chemical instruments and methods, earthwork drilling, and drilling compositions, etc. It can solve the problem of oil production decline, high molecular compound, drag-reducing water viscosity increase, and unfavorable flowback and other issues, to achieve the effect of reducing material cost, reducing friction, and easy flowback

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

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Problems solved by technology

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; Molecular compounds block the pores of the formation, resulting in a decrease in oil output, and polymer compounds seep into the groundwater through the formation gaps, causing water pollution

Method used

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  • Preparation method of self-suspension proppant and prepared proppant
  • Preparation method of self-suspension proppant and prepared proppant
  • Preparation method of self-suspension proppant and prepared proppant

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1) Using quartz sand (river sand) as raw material, after scrubbing and drying at 120°C for 5 hours, the sand contains no water at all, and 1000g of 20-40 mesh quartz sand is screened as aggregate;

[0031] 2) Add 8g of guar gum (viscosity at room temperature: 150mPa.S) at room temperature. Stir well. After drying and cooling, sieve.

[0032] The proppant obtained after sieving has a particle size of 20-40 mesh (slightly larger than the particle size of the aggregate), 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 (river sand) of 40-70 mesh as aggregate and set aside;

[0035] 2) Add 10g xanthan gum (viscosity 2000mPa.S at room temperature) at room temperature and mix evenly.

[0036] 3) After cooling, sieve and obtain.

Embodiment 3

[0038] 1) Take 30-50 mesh and 1kg of quartz sand (eolian sand) as aggregate, and set aside;

[0039] 2) First heat the quartz sand to 200°C, when the temperature of the aggregate naturally drops to 130°C, prepare 5g of carboxymethyl hydroxypropyl guar gum into a 20% aqueous solution, add the aggregate and mix evenly;

[0040] 3) After drying, sieve to obtain.

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Abstract

The invention discloses a preparation method of a self-suspension proppant. The self-suspension proppant is prepared by dispersing a water-soluble polymer material into an aggregate at 15-150 DEG C, wherein the water-soluble polymer material is selected from natural polymer materials, artificially synthesized polymer materials or semi-naturally semi-artificially synthesized polymer materials, and the use amount of the water-soluble polymer material accounts for 0.1-15wt% of that of the aggregate. By virtue of optimized selection of raw materials and process conditions, a preparation process of the proppant which covers the polymer material simply, conveniently and effectively is dramatically obtained, the material cost is reduced, and a used covering material cannot cause pollution to the environment. The self-suspension fracturing proppant disclosed by the invention does not need high-cost fracturing fluid containing organic high polymers to perform fracturing, but directly uses natural water available everywhere to perform fracturing, so that pollution is reduced, and the cost is reduced.

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] Propped fracturing is a method of recovering oil or natural gas by using fracturing proppant fracturing and propping fracturing to improve the conductivity of fractures. [0003] 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. On the other hand, the polymer compou...

Claims

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Application Information

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IPC IPC(8): C09K8/80
CPCC09K8/80
Inventor 秦升益胡文进王中学胡炜
Owner BEIJING RECHSAND SCI & TECH GRP
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