Preparation method of clean-water fracture propping agent

A clean water fracturing and proppant technology, which is applied in chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve the problems of high density and poor suspension of fracturing proppants, and reduce fracturing costs, Good stability and wide temperature range

Inactive Publication Date: 2019-01-18
CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of clear water fracturing proppant to solve the problem that the fracturing proppant prepared by the traditional method has high density, poor suspension and is not easily carried into the well

Method used

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  • Preparation method of clean-water fracture propping agent
  • Preparation method of clean-water fracture propping agent
  • Preparation method of clean-water fracture propping agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing a clear water fracturing proppant, comprising the following steps:

[0042] (1) Prepare the following raw materials in parts by mass: 100 parts of aggregate, 2 parts of resin, 1.1 part of curing agent, and 0.01 part of catalyst. The aggregate is 20 / 40 quartz sand, the resin is glycerol polymer, the curing agent is toluene diisocyanate, and the catalyst is dibutyltin dilaurate.

[0043] (2) Heat the aggregate to 90°C, add resin and catalyst, and mix and stir;

[0044] (3) When the temperature drops to 80°C, add a curing agent and mix and stir; when the temperature drops to 50°C, take it out of the pot to obtain a clear water fracturing proppant.

[0045] The energy spectrum test characteristic of the proppant coating layer prepared in this example is that the atomic ratio of carbon to oxygen is 5:1.

Embodiment 2

[0047] A method for preparing a clear water fracturing proppant, comprising the following steps:

[0048] (1) Prepare the following raw materials in parts by mass: 100 parts of aggregate, 2.5 parts of resin, 1.63 parts of curing agent, and 0.015 parts of catalyst. The aggregate is 30 / 50 quartz sand, the resin is propylene glycol polymer, the curing agent isophorone diisocyanate, and the catalyst is tributyltin.

[0049] (2) Heat the aggregate to 100°C, add resin and catalyst, and mix and stir;

[0050] (3) When the temperature drops to 90°C, add a curing agent and mix and stir; when the temperature drops to 60°C, take it out of the pot to obtain a clean water fracturing proppant.

[0051] The energy spectrum test characteristic of the proppant coating layer prepared in this example is that the atomic ratio of carbon to oxygen is 6:1.

Embodiment 3

[0053] A method for preparing a clear water fracturing proppant, comprising the following steps:

[0054] (1) Prepare the following raw materials in parts by mass: 100 parts of aggregate, 3 parts of resin, 2.3 parts of curing agent, and 0.02 parts of catalyst. Among them, 40 / 70 quartz sand is used as the aggregate, propanol polymer is used as the resin, diphenylmethane diisocyanate is used as the curing agent, and lead isooctoate is used as the catalyst.

[0055] (2) Heat the aggregate to 110°C, add resin and catalyst, and mix and stir;

[0056] (3) When the temperature drops to 100°C, add a curing agent and mix and stir; when the temperature drops to 70°C, take it out of the pot to obtain a clear water fracturing proppant.

[0057] The energy spectrum test characteristic of the proppant coating layer prepared in this example is that the atomic ratio of carbon to oxygen is 7:1.

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Abstract

The invention belongs to the field of compositions for enhancing the fracture action and particularly discloses a preparation method of a clean-water fracture propping agent. The clean-water fracturepropping agent comprises aggregates and a laminating layer wrapping outside the aggregates, wherein the energy spectrum test characteristic of the laminating layer is as follows: the ratio of carbon atoms to oxygen atoms is (1.5-7.5):1; the preparation of the clean-water fracture propping agent comprises the following steps: (1) preparing the following materials of aggregates, resin, a curing agent and a catalyst; (2) after heating the aggregates to 80-160 DEG C, adding the resin and the catalyst, and mixing and stirring; and (3) reducing the temperature to 70-140 DEG C, adding the curing agent, mixing and stirring; reducing the temperature to 40-100 DEG C, taking out of a pot and obtaining the clean-water fracture propping agent. The clean-water fracture propping agent prepared by using the method is good in suspending property and is easily carried into a well.

Description

technical field [0001] The invention belongs to the field of compositions for strengthening fracturing, and in particular relates to a preparation method of a clear water fracturing proppant. Background technique [0002] In order to develop deep oil and gas wells and increase production, hydraulic fracturing technology is widely used. Hydraulic fracturing technology is a technology that uses high-pressure pumps on the ground to continuously inject high-viscosity fracturing fluid into the oil well through the wellbore to form a high pressure in the lower part of the oil well. With the continuous injection of fracturing fluid, the pressure also continues to rise. When the tensile strength and formation stress of the formation rock near the wellbore wall are less than the pressure formed by the fracturing fluid, fractures will occur in the formation near the bottom of the well. When the fracturing fluid carrying proppant continues to be injected, the fractures in the rock for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
CPCC09K8/80
Inventor 熊帆熊鹰王正力陈秋庆
Owner CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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