Study on Pressure Propagation in Tight Oil Reservoirs with Stimulated Reservoir Volume Development | Zendy

Weiyao Zhu | Zendy; Yunfeng Liu | Zendy; Zhongxing Li | Zendy; Ming Yue | Zendy; Debin Kong | Zendy

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Study on Pressure Propagation in Tight Oil Reservoirs with Stimulated Reservoir Volume Development

Author(s) -

Weiyao Zhu,

Yunfeng Liu,

Zhongxing Li,

Ming Yue,

Debin Kong

Publication year - 2021

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.0c04661

Subject(s) - pressure gradient , mechanics , flow (mathematics) , sensitivity (control systems) , permeability (electromagnetism) , boundary value problem , fracture (geology) , stress (linguistics) , oil field , matrix (chemical analysis) , geology , geotechnical engineering , petroleum engineering , materials science , mathematics , engineering , physics , chemistry , mathematical analysis , linguistics , philosophy , electronic engineering , membrane , composite material , biochemistry

The stimulated reservoir volume fracturing development in tight oil reservoirs is characterized by multiscale flow of the reservoir matrix, fracture network, and hydraulic fracture. Therefore, the flow field structure is extremely complex. Multiscale flow characteristics have been revealed through the systematical experiments including the threshold pressure gradient and the stress sensitivity. Based on the theory of elliptical flow, a comprehensive and practical mathematical model of multiregion coupling flow is established to characterize the multiscale flow, and the pressure distribution equation is derived. The calculation method of moving boundary is established to simulate the dynamic supply boundary and the dynamic pressure distribution by using the steady-state sequential replacement method. The characteristics of multiscale flow, multistage development state, and stress sensitivity are considered, especially the different stress sensitivity characteristics in different regions. Finally, the pressure propagation in tight reservoirs is clarified and the influence of matrix permeability, stress sensitivity characteristics, and drawdown pressure on the distance at the dynamic supply boundary are revealed. The research results provide theoretical basis for the development effect evaluation.

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