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Low-damage super guargum fracturing fluid

A technology for water-based fracturing and base fluid, which is applied to drilling compositions, chemical instruments and methods, etc., can solve the problems of low-temperature gel breaking of fracturing fluid, and achieves low gel breaking load, high thickening efficiency, water The effect of low insoluble content

Inactive Publication Date: 2011-07-20
DAQING OILFIELD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the fracturing needs of low-temperature reservoirs, the problem of low-temperature gel breaking of fracturing fluids is solved

Method used

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  • Low-damage super guargum fracturing fluid
  • Low-damage super guargum fracturing fluid
  • Low-damage super guargum fracturing fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Drainage aid QD-04 0.25%, anti-emulsifier PR-302 10.20%, compound clay stabilizer 1.2%, vegetable gum stabilizer ZW-Ⅲ 0.1%, PH value regulator 0.06%, defoamer LRX0 .06% and the rest of water to make a solution, add thickener super guar gum 0.28% under high-speed stirring at 2000r / min to make a base liquid;

[0017] (2) Mix crosslinking agent XJL-210.0%, gel breaker 0.25% and the rest of water into crosslinking liquid;

[0018] (3) Two sets of pump trucks are used to simultaneously pump base fluid and cross-linking fluid into the fracturing manifold at a weight ratio of 50:1 for fracturing construction.

Embodiment 2

[0020] (1) Drainage aid QD-040.2%, anti-emulsifier PR-30210.15%, compound clay stabilizer 0.6%, vegetable glue stabilizer ZW-Ⅲ0.1%, PH value regulator 0.06%, defoamer LRX0 .05% and the rest of water to make a solution, add thickener super guar gum 0.15% under high-speed stirring at 2000r / min to make a base liquid;

[0021] (2) Mix 6.0% of cross-linking agent XJL-2, 0.2% of gel breaker and the rest of water into cross-linking liquid;

[0022] (3) Two sets of pump trucks are used to simultaneously pump base fluid and cross-linking fluid into the fracturing manifold at a weight ratio of 50:1 for fracturing construction.

[0023] Each component in the above-mentioned embodiment is by mass percentage, and wherein composite clay stabilizer is made up of clay stabilizer LDW and clay stabilizer QD-10 by weight ratio 2:3, and pH value adjusting agent is made up of NaOH and NaOH 2 CO 3 According to the weight ratio of 4:1, the ternary breaker is composed of K 2 S 2 o 8 、Na 2 S 2 ...

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Abstract

The invention relates to low-damage super guargum fracturing fluid, which comprises base fluid and crosslinked fluid, wherein the weight ratio of the base fluid and the crosslinked fluid is 50:1; the base fluid consists of 0.15 to 0.28 percent of super guargum serving as a thickener, 0.20 to 0.25 percent of discharge aiding agent, 0.15 to 0.20 percent of emulsifier, 0.60 to 1.20 percent of composite clay stabilizer, 0.10 to 0.15 percent of vegetable gelatin stabilizer, 0.05 to 0.08 percent of pH regulator, 0.05 to 0.10 percent of defoamer and the balance of water; and the crosslinked fluid consists of 6.0 to 10.0 percent of organic borate serving as a crosslinking agent, 0.15 to 0.25 percent of ternary gelbreaker and the balance of water. In the invention, the dose of the thickener is low; the residue content is low; the temperature resistance and shearing resistance are high; the gel breaking is complete; the filtration is low; and the cracking damage to the reservoir stratum and proppant is relieved.

Description

technical field [0001] The invention relates to the application field of oilfield chemistry, and is a low-damage super guar gum fracturing fluid that reduces damage to the permeability and fracture conductivity of low-permeability and high-mud reservoirs. Background technique [0002] With the deepening of oilfield development, more and more low-permeability reservoirs urgently need to be developed and utilized. However, due to the complex physical conditions of low-permeability oil layers, the sensitivity to fracturing fluid is strong, and the fracturing fluid will cause great damage to the oil layer. Therefore, it is necessary to effectively control and reduce the damage of fracturing fluid and further improve the effect of fracturing measures. key. In Daqing Oilfield, the average annual consumption of fracturing fluid thickener is about 2000t, and the residue produced in the fracturing process exceeds 150t. Reducing the dosage of thickener will reduce the content of soli...

Claims

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Application Information

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IPC IPC(8): C09K8/68
Inventor 张玉广王贤君肖丹凤张明慧韩松裴涛
Owner DAQING OILFIELD CO LTD
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