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Method for producing support agent for petroleum well by using quartz tail sand

A quartz tailings and proppant technology, applied in chemical instruments and methods, earth-moving drilling, wellbore/well components, etc., can solve the problems of poor sphericity, low strength of quartz sand, and reduced fracture conductivity, etc. To achieve good use and good spherical effect

Inactive Publication Date: 2017-05-31
SICHUAN NANLIAN MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, quartz sand has low strength bottom and poor sphericity, which reduces fracture conductivity and is not suitable for deep wells with high closure pressure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method of utilizing quartz tailings to produce proppant for oil wells, comprising the following steps:

[0027] (1) Washing: Put the quartz tailings in a hydrocyclone to clean until the surface does not appear to have obvious impurities;

[0028] (2) mechanical scrubbing to remove iron: the quartz tailings after step (1) cleaning is mechanically scrubbed, the placer scrubbing concentration is 50%, and the scrubbing time is 5 hours;

[0029] (3) Flotation to remove iron: send the quartz tailings obtained in step (2) into the slurry mixing tank, add the H2SO4 solution with a concentration of 30mol / L to form a quartz sand slurry, and then send the slurry into the second Slurry mixing tank, then add flotation agent to it for full reaction, then put the slurry into the flotation machine for flotation, and filter the flotation quartz tailings through polyurethane high-frequency vibrating sieve, then dry them for later use.

[0030] (4) Dry cleaning: the quartz tailings obt...

Embodiment 2

[0036] A method of utilizing quartz tailings to produce proppant for oil wells, comprising the following steps:

[0037] (1) Washing: Put the quartz tailings in a hydrocyclone to clean until the surface does not appear to have obvious impurities;

[0038] (2) mechanical scrubbing to remove iron: the quartz tailings after step (1) cleaning is mechanically scrubbed, the placer scrubbing concentration is 60%, and the scrubbing time is 6 hours;

[0039] (3) Flotation to remove iron: the quartz tailing sand obtained in step (2) is sent into the slurry mixing tank, adding a concentration of H2SO4 and HF mixed solution of 30mol / L to form a quartz sand slurry, and then the slurry Send it into the second slurry mixing tank, then add flotation reagents to it for full reaction, then put the slurry into the flotation machine for flotation, and filter the flotation quartz tailings through polyurethane high-frequency vibrating screen before drying Dry and set aside.

[0040] (4) Dry clean...

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PUM

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Abstract

The invention discloses a method for producing a support agent for a petroleum well by using quartz tail sand, and relates to the technical field of quartz sand production. Through a series of steps of water washing, mechanical wiping deironing, flotation deironing, dry washing cleaning, primary grading, secondary grading, resin coating and bag charging, the quartz tail sand is successfully processed into the support agent for the petroleum well; the problems that the quartz sand has insufficient sphericity and hardness and cannot be widely applied to the support agent for the petroleum well in the prior art can be solved.

Description

technical field [0001] The invention relates to the technical field of quartz sand production, in particular to a method for producing proppant for oil wells using quartz tailings. Background technique [0002] Quartz tailings are precious mineral resources, and the annual discharge in my country is tens of millions of tons, so resource utilization has become an inevitable trend. The annual discharge of quartz tailings and mine tailings in the country is more than 10 million tons. Discharging such a large amount of quartz tailings and mine tailings will directly cause serious environmental pollution, occupation of cultivated land, silting of rivers and reservoirs and other adverse consequences. Many enterprises are still relatively backward in technology and dust prevention, especially during the dry processing of quartz sand, a large amount of dust is generated, and the production environment is quite harsh, which seriously endangers the health of employees and nearby resid...

Claims

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Application Information

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IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 曾伟候龙
Owner SICHUAN NANLIAN MINING CO LTD
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