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Unconventional Well Test Analysis for Assessing Individual Fracture Stages through Post-Treatment Pressure Falloffs: Case Study

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  • Abdulaziz Ellafi

    (Department of Petroleum Engineering, University of North Dakota, Grand Forks, ND 58202, USA)

  • Hadi Jabbari

    (Department of Petroleum Engineering, University of North Dakota, Grand Forks, ND 58202, USA)

Abstract

Researchers and operators have recently become interested in the individual stage optimization of unconventional reservoir hydraulic fracture. These professionals aim to maximize well performance during an unconventional well’s early-stage and potential Enhanced Oil Recovery (EOR) lifespan. Although there have been advances in hydraulic fracturing technology that allow for the creation of large stimulated reservoir volumes (SRVs), it may not be optimal to use the same treatment design for all stages of a well or many wells in an area. We present a comprehensive review of the main approaches used to discuss applicability, pros and cons, and a detailed comparison between different methodologies. Our research outlines a combination of the Diagnostic Fracture Injection Test (DFIT) and falloff pressure analysis, which can help to design intelligent production and improve well performance. Our field study presents an unconventional well to explain the objective optimization workflow. The analysis indicates that most of the fracturing fluid was leaked off through natural fracture surface area and resulted in the estimation of larger values compared to the hydraulic fracture calculated area. These phenomena might represent a secondary fracture set with a high fracture closure stress activated in neighbor stages that was not well-developed in other sections. The falloff pressure analysis provides significant and vital information, assisting operators in fully understanding models for fracture network characterization.

Suggested Citation

  • Abdulaziz Ellafi & Hadi Jabbari, 2021. "Unconventional Well Test Analysis for Assessing Individual Fracture Stages through Post-Treatment Pressure Falloffs: Case Study," Energies, MDPI, vol. 14(20), pages 1-25, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:20:p:6747-:d:658118
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    References listed on IDEAS

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    1. Hadi Parvizi & Sina Rezaei Gomari & Farhad Nabhani & Abolfazl Dehghan Monfared, 2018. "Modeling the Risk of Commercial Failure for Hydraulic Fracturing Projects Due to Reservoir Heterogeneity," Energies, MDPI, vol. 11(1), pages 1-14, January.
    2. Qiuping Qin & Qingfeng Xue & Zizhuo Ma & Yikang Zheng & Hongyu Zhai, 2021. "Hydraulic Fracturing Simulations with Real-Time Evolution of Physical Parameters," Energies, MDPI, vol. 14(6), pages 1-12, March.
    3. Jianming He & Chong Lin & Xiao Li & Xiaole Wan, 2016. "Experimental Investigation of Crack Extension Patterns in Hydraulic Fracturing with Shale, Sandstone and Granite Cores," Energies, MDPI, vol. 9(12), pages 1-16, December.
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