With extremely complicated geological conditions, there is abundant coalbed methane in the China's Ordos Basin Area. As a result of coexistence of different pressure systems in the same one naked well section, there are so many problems taking place occasionally during the drilling process, such as the formation lost circulation and collapse, which require the drilling fluid with a perfect rheology behavior and inhibitive to improve the well-bore containment. The coalbed methane well completions are diverse, usually including vertical well, horizontal well, multi-branch well, and other different well types. So the drilling fluid must have cuttings carried effectively and protect formation damaged to ensure that the process of drilling is security and smooth. Lots of drilling methods are used in the coalbed methane drilling, besides normal nearly balanced drilling, the under balance drilling fluids such as the air, fog, foam, etc particularly improved. All this drilling fluids require itself working compatibility with other fluids in the hole. Therefore, the special state-funded science and technology project has developed a novel bionic Fuzzy-Ball drilling fluid to meet the coalbed methane. Without additional equipments, this novel drilling fluids can be made, with non-solid phase and low density, 0.8~1.0 g/cm3. The inert solids can also be used to adjust the property to more than 1.0g/cm3, matching the near/under-balanced drilling. The formation well-bore containment can effectively improve to meet to the more than 1000 meters coalbed methane drilling in the open or low pressure formation, To portable cuttings effectively under low rate, the ratio of yield point and plastic viscosity can be adjusted to 1.0Pa/mPa•s or more. Combined with the air drilling, this novel Fuzzy-Ball material could not be converted to fluid to solve the formation water production, cavings, completion and other operations. 10 wells application of using the Fuzzy-Ball drilling fluid to complete the coal bed methane wells overcoming water production, collapse, lost circulation and air drilling etc, taking five branches well FL-H2-L, "U" horizontal well DFS-02-H2, water production and collapse well J35, air drilling CLY22 for examples, are introduced to indicate the bionic Fuzzy-Ball fluid application on the coalbed methane drilling spot.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A Multifunctional Drilling Fluid for Coalbed Methane Drilling


    Contributors:
    Zheng, Li-Hui (author) / Zhang, Ming-Wei (author) / Lin, Yong (author)


    Publication date :

    2012


    Size :

    7 Seiten




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Decontamination of Drilling Fluid Waste from Coalbed Methane Well

    Guo, Li-Jun / Li, Jian / Hu, Huan-Yu et al. | Tema Archive | 2012


    Multifunctional ocean drilling ship form

    ZHANG HAIBIN / HE JINHUI / ZHAO JIANTING et al. | European Patent Office | 2023

    Free access


    Coalbed methane extraction and utilization

    Creedy, D. | Online Contents | 2003


    Multifunctional oil field drilling truck

    YANG WUHONG / CHEN YONG / HUANG HUANG et al. | European Patent Office | 2023

    Free access