The Development of New Active Gelled Acid and the Practical Application

Abstract:

In order to improve the effect of acid fracturing in reservoirs, a new active gelled acid system is developed. Compared with the conventional acid, the better performance, including the slower reaction rate, lower filtration, inducing cracks, self-redirection, enables the new acid system to realize the deeper reconstruction of reservoir, and then improve the effect of acid treatment. Due to the low surface tension and the low broken plastic residue, the new active gelled acid will flowback easily after fracturing, so it has less damage to the reservoir. In addition, field test showed that the construction friction of the new acid system is 40%~60% of clear water, so it can be used for the operation with large displacement. Practice shows that the acid system is adaptive to different reservoirs, such as sandstone and limestone, and after fracturing by taking it, the production or injection capacity of single well is greatly improved. So the new active gelled acid system is of high popularization value and good application prospect, and plays a positive role to improve the acid modification effect of the reservoir.

• Periodical: Advanced Materials Research (Volume 997)
• Pages: 62-68
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.997.62
• Online since: August 2014
• Authors: Ping Yuan*, Jian Ye Yu, Yong Fu Tao, Yu Feng Yuan, Min Hui Lu
• Keywords: Acid Fracturing, Active Gelled Acid, Low-Permeability Reservoir

References

[1] B.B. Williams, G.L. Gidley. acidizing fundamentals[M]. New York: Society of Petroleum Engineers of AIME, 1979: 66-79.

[2] LI Kexiang. Reservoir protection technology of well completion and drilling[M]. Beijing: Petroleum industry press, 1993: 737-743.

[3] C. W. Crowe, B. H. Hutchinson, B. L. Trittipo. Fluid-Loss Control: The Key to Successful Acid Fracturing[J]. SPE16883, (1989).

DOI: 10.2118/16883-pa

[4] Ben-Maceur, Kamel, Economides, et al. Design and Evaluation of Acid Fracturing Treatments[C]. SPE18978, (1989).

[5] B. D. Sanford, C. R. Dacar. Acid Fracturing With New Fluid-Loss Control Mechanisms Increases Production, Little Knife Field, North Dakota[C]. SPE24344, (1992).

DOI: 10.2118/24344-ms

[6] C. W. Crowe, R. C. Martin, A. M. Michaelis. Evaluation of Acid-Gelling Agents for Use in Well Stimulation[J]. SPE9384, (1981).

[7] Chen Guiying, Hui Xiaoxia. Cream with gelled acid production and the progress of the crosslinked acid[J]. Oilfield chemistry, 1987, 4(3): 220-224.

[8] A. S. Pabley, D. L. Holcomb. A New Stimulation Technique: High Strength Crosslinked Acid[C]. SPE 9241, (1980).

DOI: 10.2118/9241-ms

[9] A. S. Pabley, D. L. Holcomb. Crosslinked High-Strength Hydrochloric Acid Gel System Rock Mountain Case Histories[J]. SPE10622, (1982).

DOI: 10.2118/10622-pa

[10] Wang Zhongxin. The latest development of oil and gas fields abroad acidification acid[M]. Petroleum exploration and development research institute of langfang branch, (1987).

[11] Gu Haijuan. Laboratory experiment on acid fracturing technology with viscous acid[J]. Fault-block oil&gas field, 2009, 16(5): 87-89.

[12] Fan Yao, Ru Ting, Bai Liangjie, et al. In situ gelled acid steering system in the application of the injection Wells[J]. Foreign oil field engineering, 2009, 25(4): 23-25.

[13] Wei Honghong, Peng Huiqun, Jing Ailin. An Analysis of Densfied Acid Acidizing Effect in the Centre Part of Ordos Basin[J]. Journal of northwest University: Natural Science Edition, 1998, 28(1): 88-91.

[14] Xiu Shuzhi, Du Chengliang, Zheng Yun, et al. Study and application of viscous acid SCJ-1[J]. Drilling and completion fluid, 1999, 16(5): 42-44.

[15] Song Jiyu, Chen Tao, Tang Zuyou, et al. A Surfactants Controlling in - Situ Gelling and Self-Diverting Acidizing Fluid and Its Use for Reservoir Blockage Relieving at Kara may Oil Fields[J]. Oilfield Chemistry, 2001, 18(2): 117-119.