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Rate Decline Analysis for Modeling Volume Fractured Well Production in Naturally Fractured Reservoirs

Author

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  • Mingxian Wang

    (Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China)

  • Zifei Fan

    (Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China)

  • Guoqiang Xing

    (Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China)

  • Wenqi Zhao

    (Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China)

  • Heng Song

    (Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China)

  • Penghui Su

    (Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China)

Abstract

Based on the property discontinuity in the radial direction, this paper develops a new composite model to simulate the productivity of volume fractured wells in naturally fractured reservoirs. The analytical solution of this model is derived in detail and its accuracy is verified by the same model’s numerical solution. Detailed analyses of the traditional transient and cumulative rate are provided for the composite model. Results show that volume fracturing mainly contributes to the early-flow period’s production rate. As interregional diffusivity ratio increases or interregional conductivity ratio decreases, the transient rate at the same wellbore pressure increases. Three characteristic decline stages may be observed on transient rate curves and the shape of traditional rate curves in the middle- and late-flow periods depends on naturally fractured medium and boundary condition. By introducing a new pseudo-steady constant, new Blasingame type curves are also established and their features are more salient than those of traditional rate curves. Five typical flow regimes can be observed on these new type curves. Sensitivity analysis indicates that new Blasingame type curves for varied interregional diffusivity ratio, interregional conductivity ratio, interporosity coefficient and dimensionless reservoir radius, except storativity ratio, will normalize in the late-flow period.

Suggested Citation

  • Mingxian Wang & Zifei Fan & Guoqiang Xing & Wenqi Zhao & Heng Song & Penghui Su, 2018. "Rate Decline Analysis for Modeling Volume Fractured Well Production in Naturally Fractured Reservoirs," Energies, MDPI, vol. 11(1), pages 1-21, January.
  • Handle: RePEc:gam:jeners:v:11:y:2018:i:1:p:43-:d:124988
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    Citations

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    Cited by:

    1. Yu Huang & Mingfeng Ma & Xin Wang & Xiaoping Li, 2022. "A General Model for Analyzing the Unsteady Pressure Performance of Composite Gas Reservoirs," Energies, MDPI, vol. 15(22), pages 1-15, November.
    2. Honghua Tao & Liehui Zhang & Qiguo Liu & Qi Deng & Man Luo & Yulong Zhao, 2018. "An Analytical Flow Model for Heterogeneous Multi-Fractured Systems in Shale Gas Reservoirs," Energies, MDPI, vol. 11(12), pages 1-19, December.
    3. Youwei He & Shiqing Cheng & Zhenhua Rui & Jiazheng Qin & Liang Fu & Jianguo Shi & Yang Wang & Dingyi Li & Shirish Patil & Haiyang Yu & Jun Lu, 2018. "An Improved Rate-Transient Analysis Model of Multi-Fractured Horizontal Wells with Non-Uniform Hydraulic Fracture Properties," Energies, MDPI, vol. 11(2), pages 1-17, February.
    4. Bing Sun & Wenyang Shi & Rui Zhang & Shiqing Cheng & Chengwei Zhang & Shiying Di & Nan Cui, 2020. "Transient Behavior of Vertical Commingled Well in Vertical Non-Uniform Boundary Radii Reservoir," Energies, MDPI, vol. 13(9), pages 1-13, May.
    5. Guoqiang Xing & Mingxian Wang & Shuhong Wu & Hua Li & Jiangyan Dong & Wenqi Zhao, 2019. "Pseudo-Steady-State Parameters for a Well Penetrated by a Fracture with an Azimuth Angle in an Anisotropic Reservoir," Energies, MDPI, vol. 12(12), pages 1-27, June.

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