Water-solubility acidity temporary plugging agent for press cracking

A technology of fracturing acidification and temporary plugging agent, which is applied in wellbore/well components, earthwork drilling, sealing/packing, etc., can solve the problems of poor plugging effect, low dissolution rate, low plugging strength, etc. Achieve the effect of improving the actual use efficiency, fast dissolving speed and convenient construction

Inactive Publication Date: 2005-03-23
北京卓辰基业技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technical scheme provides a water-soluble viscosity agent, its solubility in an oil-water mixed solution with a water content of more than 50% can reach more than 90%, and its dosage can be reduce

Method used

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  • Water-solubility acidity temporary plugging agent for press cracking
  • Water-solubility acidity temporary plugging agent for press cracking
  • Water-solubility acidity temporary plugging agent for press cracking

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1. The water-soluble fracturing acidified temporary plugging agent of the present invention contains three components of bone glue, sulfonated asphalt and guar gum, and the weight ratio of the three components is: bone glue: sulfonated asphalt: guar gum. 6.5:3:1.

[0020] The preparation method adopted is as follows: measure 65Kg of water and heat and keep it at 75℃, add 65Kg of bone glue, stir while adding, to completely dissolve the bone glue, after the temperature drops to 45℃, add 30Kg of sulfonated asphalt, while adding Stir evenly, then add 10Kg of guar gum, stir evenly to make the components evenly mixed, pour it on the container and spread it into a cake with a thickness of about 3mm, after natural drying, crush with a grinder and sieving to select a particle size of 3 -6mm is used as a temporary plugging agent for finished products.

[0021] Through the solubility test and the pressure resistance test of the finished temporary plugging agent prepared above,...

Example Embodiment

[0045] Example 2. The water-soluble fracturing acidified temporary plugging agent of the present invention contains three components of bone glue, sulfonated asphalt and guar gum, and the weight ratio of the three components is: bone glue: sulfonated asphalt: guar gum. 5.5:1.5:2.

[0046] The preparation method adopted is as follows: measure 55Kg of water and heat and keep it at 70℃, add 55Kg of bone glue, stir while adding to make the bone glue completely dissolve, after the temperature drops to 40℃, add 15Kg of sulfonated asphalt, while adding While stirring evenly, add 20Kg of guar gum, stir evenly to make the components evenly mixed, pour it on the container and spread it into a cake with a thickness of about 3mm, after natural drying, crush with a grinder and sieving to select the particle size 3-6mm is used as a temporary plugging agent for finished products.

[0047] (1) Solubility experiment: test the dissolution rate of the sample at different temperatures and different m...

Example Embodiment

[0070] Example 3, the water-soluble fracturing acidified temporary plugging agent of the present invention contains three components of bone glue, sulfonated asphalt and guar gum, and the weight ratio of the three components is: bone glue: sulfonated asphalt: guar gum. 6:2.5:1.5.

[0071] The preparation method adopted is: measure 60Kg of water and heat and keep it at 80℃, add 60Kg of bone glue, stir while adding, so that the bone glue is completely dissolved, after the temperature drops to 50℃, add 25Kg of sulfonated asphalt, while adding While stirring evenly, then add 15Kg of guar gum. After stirring vigorously to make the components evenly mixed, pour it on the container and spread it into a cake with a thickness of about 3mm. After natural drying, it is crushed with a grinder and sieved to select the particle size. 3-6mm is used as a temporary plugging agent for finished products.

[0072] The temporary plugging agent prepared in the above example 3 was carried out indoor exp...

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Abstract

The invention relates to a water-soluble fracturing-acidifying temporary-stopping agent, used in temporary- stopping bed of oil water well in the course of selecting fracturing and multi-crack fracturing. It is comprised of bone glue, sulfonated pitch and guargum in the weight ratio of 5.5-6.5 to 1.5-3.5 to 1-2. Its preparing method is taking a certain amount of water to heat and keep the temperature at 70-80 deg.C, adding in bone glue and stirring, dissolving; when the temperature is lowered to 40-50 deg.C, adding in sulfonated pitch and stirring uniformly; adding in guargum and strongly stirring uniformly; pouring into a special container, spreading out into an about 3mm-thick cake in shape, and naturally drying; crushing and then screening, and selecting the particles with 3-6 mm diameter as the finished product. It is fast to dissolve, low-cost and strongly-stopping.

Description

technical field [0001] The invention relates to a water-soluble fracturing and acidizing temporary plugging agent, which is used as a water-soluble fracturing and acidizing temporary plugging agent for oil-water wells in the process of selective fracturing and multi-fracture fracturing for temporarily blocking intervals. Background technique [0002] In the late stage of oilfield exploitation, in order to increase oil production, some technical treatment should be taken on the oil layer, such as fracturing the oil-water layer, etc. In the selective fracturing technology, the high permeability formation needs to be blocked with a plugging agent in advance. In order to perform fracturing on low-permeability formations, and in the process of multi-fracture fracturing, it is necessary to temporarily plug the fractures that have been sanded so that the fractures can be opened again. It is mainly based on the principle of layered fracturing to solve the conflict between layers: no...

Claims

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Application Information

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IPC IPC(8): E21B33/12
Inventor 臧海宏
Owner 北京卓辰基业技术开发有限公司
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