Analysis Model and Influencing Factors of Passability of Coiled Tubing Conveying Clustered Perforating String

doi:10.3969/j.issn.1006-6535.2022.05.020

Abstract

Abstract: To address the problem that the coiled tubing gets stuck in wells when conveying the clustered perforating string, considering the influence of wellbore trajectory, wellbore constraint, tool string variable diameter structure, tool deformation and coiled tubing buckling effect, the micro-element method was adopted to establish an analysis model of the passability of the coiled tubing conveying clustered perforating string to analyze the passability of the coiled tubing conveying 1 bridge plug + 2 clustered perforating guns string in the wellbore. The research shows: The operation tool string will not be stuck during the running process, and the coiled tubing conveying clustered perforating string can go down to the predetermined well depth of 3850m; the longer the vertical section and the shorter the horizontal section, the better the wellbore trajectory is for running the pipe string; the smaller the number of perforation clusters, the smaller the size of the perforating gun, and the larger the coiled tubing size, the better the passability of the tubing string. The analysis method can provide technical support for the operating parameters optimization and operation of the coiled tubing conveying the perforating string on site.

Key words: clustered perforating string, coiled tubing, wellbore trajectory, buckling effect, horizontal well

CLC Number:

TE358

Liu Jun, Du Zhigang, Mu Shaomin, Wang Muwei, Zhang Min, Yin Teng, Yu Hai, Cao Dayong. Analysis Model and Influencing Factors of Passability of Coiled Tubing Conveying Clustered Perforating String[J]. Special Oil & Gas Reservoirs, 2022, 29(5): 139-148.

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