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Cement permeation promoter for oil and gas well

A permeability enhancer and technology for oil and gas wells, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problem of poor temperature resistance, salt resistance, low compressive strength of cement stone, and poor permeability enhancement effect and other problems, to achieve the effect of good alkali resistance, low cost and stable slurry

Inactive Publication Date: 2006-08-02
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are disadvantages such as poor permeation effect, poor temperature resistance and salt resistance, and low compressive strength of cement after curing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 100g of aluminum powder produced by Sichuan Luzhou Yulong Superfine Materials Co., Ltd. that can pass through a 80-mesh (178μm) sieve, blow it horizontally into a reaction vessel at 90°C, and spray potassium permanganate into the reaction vessel at the same time. 15% aqueous solution, the aluminum powder is fully contacted with potassium permanganate aqueous solution, reacted and passivated, and then dried to obtain the desired modified aluminum powder. Get modified aluminum powder 10g, be equipped with the gum rosin (can pass through 80 mesh (178 μm) sieves) 30g that Guangxi Wuzhou Turpentine Co., Ltd. 10 # 40g of construction asphalt and 20g of chrysotile fiber (0.1-0.4cm in length, 4-10 in aspect ratio) produced by Sichuan Xinkang Asbestos Mine are fully mixed in a mixer to obtain the product——penetration enhancer.

Embodiment 2

[0021] Take 200g of aluminum powder produced by Sichuan Luzhou Yulong Superfine Materials Co., Ltd. that can pass through a 80-mesh (178μm) sieve, blow it horizontally into a reaction vessel at 90°C, and spray potassium permanganate into the reaction vessel at the same time. 18% aqueous solution, make the aluminum powder fully contact with potassium permanganate, passivate the reaction, and then dry it to obtain the required modified aluminum powder. Get modified aluminum powder 16g, be equipped with the gum rosin (can pass through 80 mesh (178 μ m) sieves) 56g of the gum rosin (can pass through 80 mesh (178 μm) sieves) produced by Guangxi Wuzhou Turpentine Co., Ltd. 10 # 84g of building asphalt and 44g of chrysotile fiber (0.1-0.4cm in length, 4-10 in aspect ratio) produced by Sichuan Xinkang Asbestos Mine are fully mixed in a mixer to obtain the product—permeation enhancer.

Embodiment 3

[0023] Take 80g of aluminum powder produced by Sichuan Luzhou Yulong Superfine Materials Co., Ltd. that can pass through a 80-mesh (178μm) sieve, blow it horizontally into a reaction vessel at 90°C, and spray potassium permanganate into the reaction vessel at the same time. 16% aqueous solution, make the aluminum powder fully contact with potassium permanganate, passivate the reaction, and then dry it to obtain the required modified aluminum powder. Get modified aluminum powder 12g, be equipped with the gum rosin (can pass through 80 mesh (178 μm) sieves) 32g that Guangxi Wuzhou rosin Co., Ltd. 10 # 38g of construction asphalt and 18g of chrysotile fiber (0.1-0.4cm in length, 4-10 in aspect ratio) produced by Sichuan Xinkang Asbestos Mine are fully mixed in a mixer to obtain the product——penetration enhancer.

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Abstract

The cement permeation promoter for oil and gas well is compounded with gum resin 25í½35 wt%, modified aluminum powder 8í½12 wt%, asphalt 35í½45 wt% and chrysotile fiber 16í½24 wt%. It is re-compounded through treating the aluminum powder with water solution of potassium permanganate to deactivate and stoving to obtain modified aluminum powder, and mixing the modified aluminum powder with other components in the said weight proportion to obtain the cement permeation promoter. The cement permeation promoter may be re-compounded with other admixtures to form a new type of permeating cement slurry system, which is cured in the stratum condition to form oil and gas passage with certain permeation rate, high strength, high heat and salt tolerance, oil phase permeation rate higher than water phase permeation rate, stable chemical performance and for cementing well, preventing sand, blocking water, etc.

Description

technical field [0001] The invention relates to an oil and gas well cement permeability enhancer. Background technique [0002] In the process of drilling, well completion and oil production stimulation in oil and gas fields, the common cement system used after gelation produces cement stone with extremely low permeability, and its permeability is about 2×10 -5 ~1×10 -7 μm 2 between. In recent years, with the strengthening of oil and gas field development, a new type of cement system—permeable cement system has been widely used in oil and gas fields, especially in well cementing, sand control, water shutoff, etc., and has strong application value. The specific performance is in the following aspects: (1) For underbalanced drilling, because the mud cake cannot be formed on the well wall, it is more vulnerable to damage than the well hole with mud cake, and the degree of damage is more serious. With conventional cement cementing, higher density cement slurry invades and le...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/56
Inventor 李平汤自强熊颖陈大钧
Owner SOUTHWEST PETROLEUM UNIV
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