YANG Ruiyue, HUANG Zhongwei, LI Gensheng, et al. Investigation of hydraulic jet multistage cavitycompletion in coalbed methane horizontal wells[J]. Journal of China Coal Society, 2022, 47(9): 3284-3297.
Citation: YANG Ruiyue, HUANG Zhongwei, LI Gensheng, et al. Investigation of hydraulic jet multistage cavitycompletion in coalbed methane horizontal wells[J]. Journal of China Coal Society, 2022, 47(9): 3284-3297.

Investigation of hydraulic jet multistage cavitycompletion in coalbed methane horizontal wells

More Information
  • Available Online: April 09, 2023
  • Published Date: September 29, 2022
  • China is rich in coalbed methane resource. However,a low production rate is the longtime bottleneck problem. In this paper,an innovative proposal of creating multistage cavities by hydraulic jet(abrasive jetting)in coalbed methane horizontal wells is presented. First,the advantages of horizontal cavity completion by hydraulic jet were discussed. Flexibility in achieving any cavity shape and size,pinpoint jetting,precise segmentation,multistage pressurerelief,creating complex networks and meeting the demand of insitu fluidized mining of underground coal resources are the major benefits. Subsequently,the FDEM method was implemented to calculate the stressrelief area and describe the fracture generation characteristics around the cavities,and then illuminate the production enhancement mechanisms. Then,the laboratory experiments of abrasive round jetting and rotating jetting on various types of coals under submerged conditions were conducted. Shapes of jetted holes,rockbreaking modes and impacts of natural fractures were investigated. The results indicated that the stratification cracking along the weak planes was the most important coalbreaking mechanism. Next,the critical downhole tools,technological processes and coal particles flowback related to different completion methods such as open hole,slotted liner,casingperforated and roof indirect stimulated wells were introduced and discussed. Finally,the application prospects and geological adaptability of the proposed method were illustrated. The proposed technique can be applied in tectonic coal,deep coal,coal measuredstrata,soft coal beds where hydraulic fracturing is ineffective or multilateral boreholes are difficult to reentry.
  • Cited by

    Periodical cited type(10)

    1. 张佳启,赵国贞,刘少炜,张普纲,赵建忠. 国内外废弃矿井资源化利用现状与关键技术研究. 矿业研究与开发. 2024(05): 174-184 .
    2. 王健,屈世甲,于振,张羽. 煤矿地下水库安全监测及预警关键技术研究. 中国煤炭. 2024(12): 71-82 .
    3. 彭海兵,李瑞群. 煤矿转型为专用地下水库技术研究. 陕西煤炭. 2023(01): 134-138 .
    4. 王永志. 万利一矿地下水库储水利用探索与实践. 内蒙古科技与经济. 2023(03): 103-105 .
    5. 池明波,吴宝杨,曹志国,李鹏,刘小庆,李海祥,张勇,杨毅. 煤矿地下水库煤柱坝体失稳机理及前兆信息. 煤炭科学技术. 2023(S2): 36-49 .
    6. 智国军,刘润,杨瑞刚,曹志国,宁杉,张成璞,鞠金峰. 煤矿地下水库人工坝体嵌入煤柱/体的构筑参数优化研究. 煤炭技术. 2022(02): 18-22 .
    7. 杨科,吕鑫,刘钦节,杨彦群,池小楼,方珏静,付强,王于,张寨男. 废弃矿井遗留煤柱-人工坝黏结体失稳特征试验研究. 采矿与安全工程学报. 2022(06): 1071-1083 .
    8. 臧天顺. 煤矿地下水水质化验探析. 内蒙古煤炭经济. 2022(22): 157-159 .
    9. 葛帅帅,冯国瑞,姚西龙,栗继祖,畅一帆. 煤矿废弃井巷抽水储能理论与技术框架. 煤炭工程. 2021(07): 91-96 .
    10. 张村,贾胜,吴山西,刘金保,焦越,张晨曦. 基于矿井地下水库的煤矿采空区地下空间利用模式与关键技术. 科技导报. 2021(13): 36-46 .

    Other cited types(5)

Catalog

    Article views (123) PDF downloads (448) Cited by(15)
    Turn off MathJax
    Article Contents

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return
    x Close Forever Close