Version 1
: Received: 4 November 2024 / Approved: 5 November 2024 / Online: 5 November 2024 (15:00:42 CET)
How to cite:
Zhang, J.; Guo, B. Use of Pressure Transient Analysis Method to Evaluate the Effectiveness of Fluid-Soaking in Multi-Fractured Shale Gas Wells. Preprints2024, 2024110341. https://doi.org/10.20944/preprints202411.0341.v1
Zhang, J.; Guo, B. Use of Pressure Transient Analysis Method to Evaluate the Effectiveness of Fluid-Soaking in Multi-Fractured Shale Gas Wells. Preprints 2024, 2024110341. https://doi.org/10.20944/preprints202411.0341.v1
Zhang, J.; Guo, B. Use of Pressure Transient Analysis Method to Evaluate the Effectiveness of Fluid-Soaking in Multi-Fractured Shale Gas Wells. Preprints2024, 2024110341. https://doi.org/10.20944/preprints202411.0341.v1
APA Style
Zhang, J., & Guo, B. (2024). Use of Pressure Transient Analysis Method to Evaluate the Effectiveness of Fluid-Soaking in Multi-Fractured Shale Gas Wells. Preprints. https://doi.org/10.20944/preprints202411.0341.v1
Chicago/Turabian Style
Zhang, J. and Boyun Guo. 2024 "Use of Pressure Transient Analysis Method to Evaluate the Effectiveness of Fluid-Soaking in Multi-Fractured Shale Gas Wells" Preprints. https://doi.org/10.20944/preprints202411.0341.v1
Abstract
Multi-stage hydraulic fracturing is a key technology adopted in the energy industry to make shale gas and shale oil fields profitable. Post-frac fluid soaking before putting wells into production has been found essential for enhancing well productivity. Finding the optimum time to terminate the fluid-soaking process is an open problem to solve. Post-frac shut-in pressure data from six wells in two shale gas fields were investigated in this study based on Pressure Transient Analysis (PTA) to reveal fluid-soaking performance. It was found that pressure derivative data become scattering after 1 day of well shut in. The overall trend of pressure derivative data after the first day of well shut-in should reflect the effectiveness of fluid-soaking. Two wells exhibited flat (zero-slope) pressure derivatives within one week of fluid-soaking, indicating adequate time of fluid-soaking. Four wells exhibited increasing pressure derivatives within one week of fluid-soaking, indicating inadequate time of fluid-soaking. This observation is consistent with reported well’s Estimated Ultimate Recovery (EUR). This study presents a new approach to assessment of post-frac fluid-soaking performance with real-time shut-in pressure data.
Keywords
shale gas; post-fracturing; fluid soaking; well productivity; test analysis
Subject
Engineering, Energy and Fuel Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
