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Cross-linking agent for low concentration guanidine gum pressing crack system and preparation technology thereof

A low-concentration, cross-linking agent technology, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as increasing the cost of fracturing fluid, and achieve the effects of reducing damage, clarifying fluid, and reducing the amount of guar gum

Active Publication Date: 2013-08-28
四川省博仁达石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the rapid rise in the price of guar gum, the cost of fracturing fluid has increased significantly

Method used

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  • Cross-linking agent for low concentration guanidine gum pressing crack system and preparation technology thereof
  • Cross-linking agent for low concentration guanidine gum pressing crack system and preparation technology thereof
  • Cross-linking agent for low concentration guanidine gum pressing crack system and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Low-concentration guar gum fracturing system cross-linking agent, which is made of raw materials in the following weight ratio:

[0049] Glycerol 12.5,

[0050] Borax 10,

[0051] Sodium Gluconate 4,

[0052] Sodium hydroxide 1.5,

[0053] Inorganic zirconium salt 4,

[0054] water 68.

[0055] The inorganic zirconium salt is a mixture of zirconium sulfate and zirconium acetate.

[0056] The preparation technology of low-concentration guar gum fracturing system cross-linking agent, it comprises the following steps:

[0057] S1. Weigh each raw material component according to the above weight ratio, then add all the water into the reaction kettle, and open the stirring device in the kettle;

[0058] S2. Add glycerol into the reaction kettle, stir for 15 minutes, and simultaneously feed steam to heat the reaction kettle, so that the temperature in the reaction kettle is maintained at 70-75°C;

[0059] S3, slowly and gradually add borax, stir for 20 minutes, after diss...

Embodiment 2

[0064] Low-concentration guar gum fracturing system cross-linking agent, which is made of raw materials in the following weight ratio:

[0065] Glycerol 20,

[0066] Borax 15,

[0067] Sodium Gluconate 6,

[0068] NaOH 2,

[0069] Inorganic zirconium salt 4,

[0070] Triethanolamine 4,

[0071] water 49.

[0072] The inorganic zirconium salt is zirconium sulfate.

[0073] The preparation technology of low-concentration guar gum fracturing system cross-linking agent, it comprises the following steps:

[0074] S1. Weigh each raw material component according to the above weight ratio, then add all the water into the reaction kettle, and open the stirring device in the kettle;

[0075] S2. Add glycerol into the reaction kettle, stir for 10 minutes, and at the same time, feed steam to heat the reaction kettle, so that the temperature in the reaction kettle is kept at 70-75°C;

[0076] S3, add borax slowly and gradually, stir for 25 minutes, after more than 80% of the soluti...

Embodiment 3

[0081] Low-concentration guar gum fracturing system cross-linking agent, which is made of raw materials in the following weight ratio:

[0082] Glycerol 18,

[0083] Borax 13,

[0084] Sodium Gluconate 5,

[0085] Sodium hydroxide 1.5,

[0086] Inorganic zirconium salt 3,

[0087] water 59.5.

[0088] The inorganic zirconium salt is a mixture of zirconium tetrachloride, zirconium oxychloride and zirconium sulfate.

[0089] The preparation technology of low-concentration guar gum fracturing system cross-linking agent, it comprises the following steps:

[0090] S1. Weigh each raw material component according to the above weight ratio, then add all the water into the reaction kettle, and open the stirring device in the kettle;

[0091] S2. Add glycerol into the reaction kettle, stir for 20 minutes, and simultaneously feed steam to heat the reaction kettle, so that the temperature in the reaction kettle is kept at 70-75°C;

[0092] S3, slowly and gradually add borax, stir f...

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Abstract

The invention discloses a cross-linking agent for a low concentration guanidine gum pressing crack system, comprising the following raw materials by weight: 12.5-20 parts of glycerol, 10-15 parts of borax, 4-6 parts of sodium gluconate, 1.5-2 parts of sodium hydroxide, 0-4 parts of inorganic zirconate, 0-4 parts of triethanolamine, and 49-68 parts of water. The invention further discloses a preparation technology. The beneficial effects comprise that: the cross-linking agent for a pressing crack liquid can substantially raise the usage efficiency of the guanidine gum, greatly reduces a usage amount of the guanidine gum; and in same case, the concentration of the guanidine can reduce 30-50%, the content of the guanidine gum residue reduces more than 30%, and a rock core damage rate relatively reduces more than 20%. The cross-linking agent prepared in the invention has same application with the current cross-linking agent, and accordingly it is convenient for on-site construction.

Description

technical field [0001] The invention relates to an oil and gas field fracturing fluid system, in particular to a low-concentration guar gum fracturing system crosslinking agent and a preparation process thereof. Background technique [0002] Reservoir hydraulic fracturing, referred to as oil reservoir fracturing or fracturing, is a technology developed in the 1940s to improve the seepage characteristics of oil reservoirs. It is an important technological measure for increasing production of oil and gas wells and increasing injection of water injection wells. It uses surface high-pressure pumps to inject high-viscosity liquid into the well at a displacement that greatly exceeds the absorption capacity of the formation, and then forms high pressure near the bottom of the well. After the pressure exceeds the formation stress near the bottom of the well and the tensile strength of the rock, fractures are formed in the formation. Continue to inject the fluid with proppant into t...

Claims

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Application Information

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IPC IPC(8): C09K8/74
Inventor 康毅张绍斌唐朝均杨延波
Owner 四川省博仁达石油科技有限公司
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