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A kind of acid liquid instant thickener and preparation method thereof

A thickening agent and quick-dissolving technology, which is applied in the field of fracturing fluid gel, can solve the problems of short penetration distance, fast acid-rock reaction speed, and short validity period of production stimulation, and achieve the effect of fast swelling time.

Active Publication Date: 2016-06-01
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the conventional acidizing construction process, due to the fast reaction speed of acid rock and the short penetration distance, it can only eliminate the damage near the wellbore, and the effective period of production increase is short; and for the wells with repeated acidizing, the effect of soil acid treatment is even worse
At present, acid fracturing is widely used in the stimulation treatment of carbonatite or limestone formations. During the treatment process, the cracks generated by fracturing create new channels under the erosion of acid, but the acid treatment effect is not good due to the shallow depth of acid erosion and filtration loss. , especially in high-temperature deep wells, the fractures far from the bottom of the well are not easily corroded by new acid liquid and communicate

Method used

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  • A kind of acid liquid instant thickener and preparation method thereof
  • A kind of acid liquid instant thickener and preparation method thereof
  • A kind of acid liquid instant thickener and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] An instant thickener for acid solution, which is prepared from the following components according to the following mass percentages: 48% thickener main agent, 50.5% thickener auxiliary agent, and 1.5% dispersant. The main agent of the thickener is polyacrylamide with a molecular weight of 15 million, the auxiliary agent of the thickener is polyethylene glycol with a molecular weight of 15 million, and the dispersant is nano-scale silicon dioxide. The above chemical reagents were all purchased from the Chemical Group of Xi'an Changqing Oilfield Branch, whose address is Chaoyang 7th Road, Weicheng District, Xianyang City, Shaanxi Province, postal code 712042. It can also be purchased directly from the market. The above acid liquid instant thickener has a fast dissolving time and is suitable for gas wells. (this ratio is the best)

[0020] The preparation method of acid liquid instant thickener is as follows:

[0021] ① Use 2m 3 Add 1.5kg of dispersant to the reaction ...

Embodiment 2

[0024] An instant thickener for acid solution, which is prepared from the following components according to the following mass percentage: 59% thickener main agent, 40% thickener auxiliary agent, and 1% dispersant. The main agent of the thickener is polyacrylamide with a molecular weight of 15 million, the auxiliary agent of the thickener is polyethylene glycol with a molecular weight of 15 million, and the dispersant is nano-scale silicon dioxide. Purchased directly from the market. The above acid liquid instant thickener has a fast dissolving time and is suitable for gas wells.

[0025] The preparation method of acid liquid instant thickener is as follows:

[0026] ① Use 2m 3 Add 1kg of dispersant to the reaction kettle; ② Slowly add 40kg of thickener auxiliary agent, stir at a constant speed of 300r / min for 5min to make it disperse evenly, and obtain a mixture; 120-mesh sieve to obtain uniform thickener main agent powder; ④ Slowly add thickener main agent powder to the m...

Embodiment 3

[0029] It is basically the same as Example 1, the difference is that an acid liquid instant thickener is prepared from the following components: 38% of the main agent of the thickener, 60% of the auxiliary agent of the thickener, and 2% of the dispersant , the above percentages are mass percentages.

[0030] Add the above-mentioned 0.8kg acid liquid instant thickener into 99.2kg of clear water to prepare a concentration of 0.8% acid liquid instant thickener solution. figure 1 Basically the same, and the thickened acid system with a concentration of 1.8% acid liquid instant thickener solution commonly used in the field has a temperature resistance of up to 145°C (attached figure 2 ). The dissolving time of the viscosified acid liquid system of the present invention is 4.5 minutes, but to achieve the same viscosity, the dissolving time of the viscosified acid liquid system commonly used in the field is 9 min.

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Abstract

The invention relates to an acid liquid instant dissolving thickening agent and a preparation method thereof. The acid liquid instant dissolving thickening agent is characterized by being prepared from the following components by mass percent: 38-59% of a main agent of the thickening agent, 40 to 60% of an auxiliary agent of the thickening agent and 1 to 2% of a dispersant. The acid liquid instant thickener for gas well fracturing is quickly dissolved, the filtration rate of the acid liquid is lowered, and the normal production and sustainable development of oilfields can be guaranteed. The research result has remarkable economic benefits, and further has significant social benefits and great popularization and application prospect.

Description

technical field [0001] The invention relates to a fracturing fluid jelly, in particular to an acid liquid instant thickener and a preparation method thereof. Background technique [0002] At present, acidification measures are often used in the reconstruction of low-permeability formations, and the acidification is generally the conventional acidification of the matrix (that is, the formation is treated with hydrochloric acid or earth acid). In the conventional acidizing construction process, due to the fast reaction speed of the acid rock and the short penetration distance, it can only eliminate the damage near the wellbore, and the effective period of production stimulation is short; and for the wells with repeated acidizing, the effect of soil acid treatment is even worse. At present, acid fracturing is widely used in the stimulation treatment of carbonatite or limestone formations. During the treatment process, the cracks generated by fracturing create new channels under...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/74
CPCC09K8/725C09K8/76
Inventor 孙虎王祖文张冕廖乐军韩文哲高燕赵文钢李婧陈亚联郭伟林李楠高红平
Owner BC P INC CHINA NAT PETROLEUM CORP
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