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    超临界二氧化碳喷射破碎页岩试验

    杜玉昆 庞飞 陈科 林拓 陈晓红 王瑞和

    杜玉昆, 庞飞, 陈科, 林拓, 陈晓红, 王瑞和, 2019. 超临界二氧化碳喷射破碎页岩试验. 地球科学, 44(11): 3749-3756. doi: 10.3799/dqkx.2019.221
    引用本文: 杜玉昆, 庞飞, 陈科, 林拓, 陈晓红, 王瑞和, 2019. 超临界二氧化碳喷射破碎页岩试验. 地球科学, 44(11): 3749-3756. doi: 10.3799/dqkx.2019.221
    Du Yukun, Pang Fei, Chen Ke, Lin Tuo, Chen Xiaohong, Wang Ruihe, 2019. Experiment of Breaking Shale Using Supercritical Carbon Dioxide Jet. Earth Science, 44(11): 3749-3756. doi: 10.3799/dqkx.2019.221
    Citation: Du Yukun, Pang Fei, Chen Ke, Lin Tuo, Chen Xiaohong, Wang Ruihe, 2019. Experiment of Breaking Shale Using Supercritical Carbon Dioxide Jet. Earth Science, 44(11): 3749-3756. doi: 10.3799/dqkx.2019.221

    超临界二氧化碳喷射破碎页岩试验

    doi: 10.3799/dqkx.2019.221
    基金项目: 

    中央高校基本科研业务费专项 18CX02072A

    国家自然科学基金项目 51404287

    详细信息
      作者简介:

      杜玉昆(1983-), 男, 博士, 硕士生导师, 研究方向为非常规能源钻探开发和高压水射流理论与应用

      通讯作者:

      陈晓红

    • 中图分类号: P618

    Experiment of Breaking Shale Using Supercritical Carbon Dioxide Jet

    • 摘要: 高效开发页岩气有利于满足日益增长的能源需求,但页岩储层的开发极为困难,超临界二氧化碳作为一种新型页岩气钻采流体,可以有效保护页岩储层,置换吸附提高页岩气采收率,并同时实现二氧化碳的埋存.研发了一套超临界二氧化碳喷射开发页岩气装置,并开展了超临界二氧化碳喷射破碎页岩室内试验.发现超临界二氧化碳射流喷射后岩石强度降低,且射流压力和温度越高,降低幅度越大;本实验条件下超临界二氧化碳射流破岩体积是水射流的1.73~6.51倍,破岩优势显著,井底环境温度对超临界二氧化碳射流的破岩性能有较大影响.表明超临界二氧化碳可显著提高页岩气钻井速度,有望形成一种高效的页岩气开发方法,应用潜力广阔.

       

    • 图  1  超临界二氧化碳喷射开发页岩气装置

      Fig.  1.  Experiment device of developing shale gas by using supercritical carbon dioxide

      图  2  试验流程

      Fig.  2.  Experimental flow chart

      图  3  喷嘴结构示意

      Fig.  3.  Experimental nozzle

      图  4  不同射流时间后岩心抗压强度

      Fig.  4.  Effect of jet time on the rock strength

      图  5  不同射流压力作用下岩心抗压强度

      Fig.  5.  Effect of jet pressure on the rock strength

      图  6  不同射流温度作用下岩心抗压强度

      Fig.  6.  Effect of jet temperature on the rock strength

      图  7  与高压水射流破岩性能对比

      Fig.  7.  Rock-breaking property comparison with water jet

      图  8  射流压力对破岩性能的影响

      Fig.  8.  Effect of jet pressure on the rock-breaking properties

      图  9  井底环境温度对破岩性能的影响

      Fig.  9.  Effect of bottom-hole temperature on the rock-breaking properties

      表  1  国内外页岩气区块主要指标对比

      Table  1.   Comparison of main indicators of shale gas blocks at home and abroad

      区块 垂深(m) 井深(m) 单井砂量(m3) 单井液量(m3) 施工压力(MPa) 排量(m3/min)
      Eagle Ford 3 500~3 658 4 800~5 000 70~110 1 500~2 000 50~70 10~12
      Haynesville 3 500~4 312 5 000~5 600 100~110 1 800 70~80 11~13
      Woodford 3 500~4 484 4 500~5 784 80~90 2 800~2 900 80~90 13~14
      中石化涪陵 3 600~4 300 5 400~5 600 30~75 1 500~2 000 75~95 10~14
      中石化丁山 4 100~4 400 5 300~5 700 20~34 2 400~2 700 80~95 12~13
      中石化永川 4 000~4 200 5 600~5 870 28~61 1 400~1 800 75~90 12~15
      中石油威远 3 600~3 900 4 880~5 700 70~90 > 2 000 70~90 10~12
      下载: 导出CSV

      表  2  岩心全矿物分析结果

      Table  2.   Total mineral analysis of rock core by XRD

      矿物类型 石英 钾长石 斜长石 方解石 黄铁矿 粘土矿物
      含量(%) 18 1 2 68 1 10
      下载: 导出CSV
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    • 收稿日期:  2019-06-17
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