Fracability Evaluation of Deep Shales in the Wufeng-Longmaxi Formation, a Case Study in Luzhou Block, Sichuan Basin

DOI

10.2991/978-94-6463-658-1_70How to use a DOI?

Keywords

fracability; shale; brittleness; in-situ stress; natural fracture

Abstract

Fracability, a key indicator for reservoir stimulation assessment, is directly related to shale gas production and resource extraction efficiency. In this study, a comprehensive fracability evaluation model for the shale reservoirs of the Wufeng-Longmaxi Formation in the Sichuan Basin was developed by taking into account factors such as brittleness, geostress differences, and natural fractures. The fracability of the Wufeng-Longmaxi Formation shale was evaluated quantitatively from the log data, and analyzed in relation to the actual fracturing of the deep well. The results show that the established model can effectively predict the fracturing potential of the reservoir. Shale brittleness is not equivalent to fracability. The brittleness index alone is not sufficient to characterize the ability of deep shale reservoirs to produce complex fracture networks after fracturing, but it is still a key factor in fracability evaluation. The established model can effectively predict the fracturing potential of the reservoir, which can provide a scientific basis for the fracturing modification and sweet spot preference of deep shale reservoirs in the Sichuan Basin. The purpose of this study is to use the comprehensive evaluation model to more accurately predict the fracturing potential of the Wufeng-Longmaxi Formation shale reservoirs in the Sichuan Basin, providing theoretical support for fracture stimulation and sweet spot optimization.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Bo Zeng
AU  - Guokai Zhao
AU  - Haoyong Huang
AU  - Junjie Chen
AU  - Zhen Zhang
AU  - Qimeng Sun
PY  - 2025
DA  - 2025/03/03
TI  - Fracability Evaluation of Deep Shales in the Wufeng-Longmaxi Formation, a Case Study in Luzhou Block, Sichuan Basin
BT  - Proceedings of the 2024 10th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2024)
PB  - Atlantis Press
SP  - 687
EP  - 702
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-658-1_70
DO  - 10.2991/978-94-6463-658-1_70
ID  - Zeng2025
ER  -