Optimization of Dynamic Fracture Plugging Parameters in Lower Cambrian Qiongzhusi Shale, Southern Sichuan Basin

doi:10.11885/j.issn.1674-5086.2024.12.12.01

Abstract

Abstract: Horizontal well staged multi-cluster fracturing is a key technology in the exploration and development of shale gas reservoir. In order to ensure the uniform expansion of multi-cluster fractures, temporary plugging ball is used to seal the advantageous fractures. In order to improve the sealing efficiency, we simulates and analyzes the migration and sealing process of temporary plugging balls in horizontal wells based on a visual wellbore temporary plugging experimental device, to understand the impact of improving the efficiency of seam sealing. Based on the Fannin equation, flow friction and fracturing process, the hole diameter model was established and the dynamic sealing parameters were optimized. The results show that when the diameter of temporary plugging ball is 1.03 times of the hole diameter and the number of temporary plugging ball is 1.1~1.3 times of the opening number of the hole, the setting efficiency of the hole after abrasion is the highest. The plugging efficiency of Well Jinye 3 in Qiongzhusi Shale was significantly improved, and the pressure of each section increased significantly after the temporary plugging, which provided a theoretical method for the optimization of the multi-cluster fracture plugging process of similar shale oil and gas horizontal wells.

Key words: Qiongzhusi, shale, fracturing, abrasion, temporary plugging

CLC Number:

TE37

LI Yongming, MA Jian, LI Tiefeng, SUN Peng. Optimization of Dynamic Fracture Plugging Parameters in Lower Cambrian Qiongzhusi Shale, Southern Sichuan Basin[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2024, 46(6): 137-145.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2024.12.12.01

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