IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v17y2024i17p4221-d1462873.html
   My bibliography  Save this article

Impacts and Countermeasures of Present-Day Stress State and Geological Conditions on Coal Reservoir Development in Shizhuang South Block, Qinshui Basin

Author

Listed:
  • Xinyang Men

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

  • Shu Tao

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

  • Shida Chen

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

  • Heng Wu

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

  • Bin Zhang

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

Abstract

This study investigates the reservoir physical properties, present-day stress, hydraulic fracturing, and production capacity of No. 3 coal in the Shizhuang south block, Qinshui Basin. It analyzes the control of in situ stress on permeability and hydraulic fracturing, as well as the influence of geo-engineering parameters on coalbed methane (CBM) production capacity. Presently, the direction of maximum horizontal stress is northeast–southwest, with local variations. The stress magnitude increases with burial depth, while the stress gradient decreases. The stress field of strike-slip faults is dominant and vertically continuous. The stress field of normal faults is mostly found at depths greater than 800 m, whereas the stress field of reverse faults is typically found at depths shallower than 700 m. Permeability, ranging from 0.003 to 1.08 mD, is controlled by in situ stress and coal texture, both of which vary significantly with tectonics. Hydraulic fracturing design should consider variations in stress conditions, pre-existing fractures, depth, structural trends, and coal texture, rather than employing generic schemes. At greater depths, higher pumping rates and treatment pressures are required to reduce fracture complexity and enhance proppant filling efficiency. The Shizhuang south block is divided into five zones based on in situ stress characteristics. Zones III and IV exhibit favorable geological conditions, including high porosity, permeability, and gas content. These zones also benefit from shorter gas breakthrough times, relatively higher gas breakthrough pressures, lower daily water production, and a higher ratio of critical desorption pressure to initial reservoir pressure. Tailored fracturing fluid and proppant programs are proposed for different zones to optimize subsequent CBM development.

Suggested Citation

  • Xinyang Men & Shu Tao & Shida Chen & Heng Wu & Bin Zhang, 2024. "Impacts and Countermeasures of Present-Day Stress State and Geological Conditions on Coal Reservoir Development in Shizhuang South Block, Qinshui Basin," Energies, MDPI, vol. 17(17), pages 1-23, August.
  • Handle: RePEc:gam:jeners:v:17:y:2024:i:17:p:4221-:d:1462873
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/17/17/4221/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1996-1073/17/17/4221/
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:17:y:2024:i:17:p:4221-:d:1462873. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.