Development and mechanism of plugging gel for water-rich sand and gravel formations

HE Xin; WANG Sheng; HE Ye; ZHOU Changjun; XIE Chengchao; TANG Qingdong and LI Shouxin; ${author.authorNameEn}

doi:10.12143/j.ztgc.2023.01.020

2023 Vol. 50, No. 1

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Article navigation > DRILLING ENGINEERING > 2023 > 50(1): 142-149

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HE Xin, WANG Sheng, HE Ye, ZHOU Changjun, XIE Chengchao, TANG Qingdong and LI Shouxin, . 2023. Development and mechanism of plugging gel for water-rich sand and gravel formations. DRILLING ENGINEERING, 50(1): 142-149. doi: 10.12143/j.ztgc.2023.01.020

Citation:

HE Xin, WANG Sheng, HE Ye, ZHOU Changjun, XIE Chengchao, TANG Qingdong and LI Shouxin, . 2023. Development and mechanism of plugging gel for water-rich sand and gravel formations. DRILLING ENGINEERING, 50(1): 142-149. doi: 10.12143/j.ztgc.2023.01.020

Development and mechanism of plugging gel for water-rich sand and gravel formations

1.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology, Chengdu Sichuan 610059, China;
2.Chengdu Hydroelectricity Construction Engineering Co., Ltd of Sinohydro Bureau No.7 Company,Chengdu Sichuan 611130, China

More Information

Corresponding author: WANG Sheng, yongyuandewangsheng@sina.com

Received Date: 12 November 2022

Revised Date: 10 December 2022

Abstract

Abstract

In view of the collapse of the trench wall and the failure of conventional plugging materials such as cement in the construction of diaphragm walls in water-rich sand and gravel formations， single factor experiment was used to analyze the influence of the gel forming agent （anionic polyacrylamide）， the crosslinking agent （chromium crosslinking agent）， the reinforcing agent and clay on the properties of polymer gel （gelation time， viscosity， strength and stability） for shallow plugging； and the optimum formulation was obtained by orthogonal test. In addition， the formation mechanism of the gel material was also analyzed. The results show that the reinforcing agent can link the gel-forming agent in gel， and further enhance the strength and stability of gel. Clay can also shorten the cross-linking time and enhance the gel strength， but clay is not conducive to the stability of the slurry. The final optimized formula is： 15% chromium crosslinking agent+5% gelling agent+8% reinforcing agent+7.5% clay. Its performance can meet the plugging requirements of shallow diaphragm walls.
- water-rich sand and gravel formations /
- diaphragm wall /
- shallow plugging /
- plugging gel /
- polymer gel

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References

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