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中低煤阶煤层气储量复算及认识——以鄂尔多斯盆地东缘保德煤层气田为例

张雷 郝帅 张伟 曹毅民 孙晓光 阴思宇 朱文涛 李子玲

张雷, 郝帅, 张伟, 曹毅民, 孙晓光, 阴思宇, 朱文涛, 李子玲. 中低煤阶煤层气储量复算及认识——以鄂尔多斯盆地东缘保德煤层气田为例[J]. 石油实验地质, 2020, 42(1): 147-155. doi: 10.11781/sysydz202001147
引用本文: 张雷, 郝帅, 张伟, 曹毅民, 孙晓光, 阴思宇, 朱文涛, 李子玲. 中低煤阶煤层气储量复算及认识——以鄂尔多斯盆地东缘保德煤层气田为例[J]. 石油实验地质, 2020, 42(1): 147-155. doi: 10.11781/sysydz202001147
ZHANG Lei, HAO Shuai, ZHANG Wei, CAO Yimin, SUN Xiaoguang, YIN Siyu, ZHU Wentao, LI Ziling. Recalculation and understanding of middle and low rank coalbed methane reserves: a case study of Baode Coalbed Methane Field on the eastern edge of Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2020, 42(1): 147-155. doi: 10.11781/sysydz202001147
Citation: ZHANG Lei, HAO Shuai, ZHANG Wei, CAO Yimin, SUN Xiaoguang, YIN Siyu, ZHU Wentao, LI Ziling. Recalculation and understanding of middle and low rank coalbed methane reserves: a case study of Baode Coalbed Methane Field on the eastern edge of Ordos Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2020, 42(1): 147-155. doi: 10.11781/sysydz202001147

中低煤阶煤层气储量复算及认识——以鄂尔多斯盆地东缘保德煤层气田为例

doi: 10.11781/sysydz202001147
基金项目: 

国家科技重大专项项目"煤层气高效增产及排采关键技术研究" 2016ZX05042

详细信息
    作者简介:

    张雷(1982-), 男, 博士, 高级工程师, 从事煤层气勘探开发研究工作E-mail: zhanglei2010@petrochina.com.cn

  • 中图分类号: TE155

Recalculation and understanding of middle and low rank coalbed methane reserves: a case study of Baode Coalbed Methane Field on the eastern edge of Ordos Basin

  • 摘要: 保德煤层气田位于鄂尔多斯盆地东缘晋西挠折带北段,属于典型的中低煤阶煤层气田。2011年,该气田探明煤层气地质储量183.63×108 m3,技术可采储量91.82×108 m3,截至目前,气田已规模开发6年。由于储量计算参数发生了明显变化,需要重新评估储量的动用情况和可动用性。2018年9月,按照储量规范,结合煤层气自身的产出机理和开发特点,利用动态资料,采用体积法复算了地质储量,采用产量递减法和类比法重新标定采收率,对2011年提交的探明储量进行了复算。复算增加煤层气探明储量29.86×108 m3;采收率标定结果为52%,较2011年增加2%;标定技术可采储量110.94×108 m3,较2011年增加19.12×108 m3。储量复算工作需重点说明计算参数的变化情况,在技术可采储量计算以及采收率确定过程中,在已开发的区域需要按照地质条件进行分类计算。

     

  • 图  1  鄂尔多斯盆地保德煤层气田地理位置

    Figure  1.  Geographical location of Baode Coalbed Methane Field, Ordos Basin

    图  2  鄂尔多斯盆地保德煤层气田储量区主力煤层厚度变化

    Figure  2.  Variation of main coal seam thickness in the reserve area of Baode Coalbed Methane Field, Ordos Basin

    图  3  鄂尔多斯盆地保德煤层气田储量区主力煤层含气量变化图

    Figure  3.  Variation of gas content of main coal seam in the reserve area of Baode Coalbed Methane Field, Ordos Basin

    图  4  鄂尔多斯盆地保德煤层气田储量区2口单采8+9号煤层煤层气井排采曲线

    Figure  4.  Drainage and production curves of no.8+9 coal beds in two CBM wells in the reserve area of Baode Coalbed Methane Field, Ordos Basin

    图  5  鄂尔多斯盆地保德煤层气田储量区计算单元划分

    Figure  5.  Unit division of the reserve area in Baode Coalbed Methane Field, Ordos Basin

    图  6  鄂尔多斯盆地保德煤层气田储量区产量递减法预测曲线

    Figure  6.  Prediction curves of production decline method in the reserve area of Baode Coalbed Methane Field, Ordos Basin

    表  1  鄂尔多斯盆地保德煤层气田已开发区Ⅰ类井与Ⅱ类井条件对比

    Table  1.   Comparison of type Ⅰ well and type Ⅱ well conditions in the reserve area of Baode Coalbed Methane Field, Ordos Basin

    参数 Ⅰ类井 Ⅱ类井
    资源条件 4+5号/8+9号煤层厚度/m 8.5/16 8.0/13
    4+5号/8+9号煤层含气量/(m3·t-1) 8.2/8.8 7.0/8.1
    资源丰度/(108 m3·km-2) 2.2 1.9
    保存条件 封盖能力 泥岩为主 泥岩为主
    构造 构造简单 构造简单
    埋深/m 500~1 000 500~1 000
    水文地质条件 矿化度值2 000~5 000 mg/L 矿化度值1 000~4 000 mg/L
    可采条件 4+5号煤层/8+9号煤层渗透率/10-3μm2 6.0/4.0 6.0/5.0
    最高产水量/(m3·d-1) 37 39
    见套压产水量/(m3·d-1) 20.14 24.29
    开机压力/MPa 6.24 7.76
    临界解吸压力/MPa 5.29 5.18
    临储比 0.85 0.66
    排采特征 产气量/m3 3 603 2 051
    井底压力/MPa 1.477 1.602
    下载: 导出CSV
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  • 收稿日期:  2019-08-08
  • 修回日期:  2019-12-13
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