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Simulation Method and Feature Analysis of Shutdown Pressure Evolution During Multi-Cluster Fracturing Stimulation

Huaiyin He1, Longqing Zou1, Yanchao Li1, Yixuan Wang1, Junxiang Li1, Huan Wen1, Bei Chang1, Lijun Liu2,*

1 Shale Gas Exploration and Development Department, CNPC Chuanqing Drilling Engineering Co., Ltd., Chengdu, 610051, China
2 College of Energy, Chengdu University of Technology, Chengdu, 610059, China

* Corresponding Author: Lijun Liu. Email: email

(This article belongs to the Special Issue: Hydraulic Fracturing Theory and Application for Geo-energy Development)

Energy Engineering 2024, 121(1), 111-123. https://doi.org/10.32604/ee.2023.041010

Abstract

Multistage multi-cluster hydraulic fracturing has enabled the economic exploitation of shale reservoirs, but the interpretation of hydraulic fracture parameters is challenging. The pressure signals after pump shutdown are influenced by hydraulic fractures, which can reflect the geometric features of hydraulic fracture. The shutdown pressure can be used to interpret the hydraulic fracture parameters in a real-time and cost-effective manner. In this paper, a mathematical model for shutdown pressure evolution is developed considering the effects of wellbore friction, perforation friction and fluid loss in fractures. An efficient numerical simulation method is established by using the method of characteristics. Based on this method, the impacts of fracture half-length, fracture height, opened cluster and perforation number, and filtration coefficient on the evolution of shutdown pressure are analyzed. The results indicate that a larger fracture half-length may hasten the decay of shutdown pressure, while a larger fracture height can slow down the decay of shutdown pressure. A smaller number of opened clusters and perforations can significantly increase the perforation friction and decrease the overall level of shutdown pressure. A larger filtration coefficient may accelerate the fluid filtration in the fracture and hasten the drop of the shutdown pressure. The simulation method of shutdown pressure, as well as the analysis results, has important implications for the interpretation of hydraulic fracture parameters.

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APA Style
He, H., Zou, L., Li, Y., Wang, Y., Li, J. et al. (2024). Simulation method and feature analysis of shutdown pressure evolution during multi-cluster fracturing stimulation. Energy Engineering, 121(1), 111-123. https://doi.org/10.32604/ee.2023.041010
Vancouver Style
He H, Zou L, Li Y, Wang Y, Li J, Wen H, et al. Simulation method and feature analysis of shutdown pressure evolution during multi-cluster fracturing stimulation. Energ Eng. 2024;121(1):111-123 https://doi.org/10.32604/ee.2023.041010
IEEE Style
H. He et al., "Simulation Method and Feature Analysis of Shutdown Pressure Evolution During Multi-Cluster Fracturing Stimulation," Energ. Eng., vol. 121, no. 1, pp. 111-123. 2024. https://doi.org/10.32604/ee.2023.041010



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