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The Effect of Temperature on Flowback Data Analysis in Shale Gas Reservoirs: A Simulation-Based Study

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  • Sen Yang

    (School of Energy Resources, China University of Geosciences, Beijing 100083, China
    Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China)

  • Fengpeng Lai

    (School of Energy Resources, China University of Geosciences, Beijing 100083, China
    Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China)

  • Zhiping Li

    (School of Energy Resources, China University of Geosciences, Beijing 100083, China
    Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China)

  • Yingkun Fu

    (Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 2W2, Canada)

  • Kongjie Wang

    (School of Energy Resources, China University of Geosciences, Beijing 100083, China
    Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China)

  • Liang Zhang

    (School of Energy Resources, China University of Geosciences, Beijing 100083, China
    Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China)

  • Yutao Liang

    (School of Energy Resources, China University of Geosciences, Beijing 100083, China)

Abstract

During hydraulic fracturing, there is a temperature difference between the injected water and formation rock for shale gas wells. The objective of this study is to investigate how this temperature difference changes with time, and how it affects multiphase-flow modeling during the shut-in and flowback periods. We conducted numerical simulations to investigate the behaviors of fracture temperature in shale gas wells. The results show a significant increase in fracture temperature during the shut-in and flowback periods. Sensitivity analysis suggests that this temperature increase is strongly related to the thermal conductivity of formation rock, matrix permeability, and initial reservoir temperature. Simulation scenarios were further compared to investigate the effect of temperature on flowback data analysis. Without considering the thermal effect, flowback data analysis may yield an earlier fracture cleanup and overestimated fracture volume. In addition, this study suggests that the thermal effect may also have implications for optimizing flowback operations.

Suggested Citation

  • Sen Yang & Fengpeng Lai & Zhiping Li & Yingkun Fu & Kongjie Wang & Liang Zhang & Yutao Liang, 2019. "The Effect of Temperature on Flowback Data Analysis in Shale Gas Reservoirs: A Simulation-Based Study," Energies, MDPI, vol. 12(19), pages 1-23, September.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:19:p:3751-:d:272439
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