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中国石油勘探  2018, Vol. 23 Issue (3): 74-80    DOI: 10.3969/j.issn.1672-7703.2018.03.009
  石油地质 本期目录 | 过刊浏览 | 高级检索 |
韩城煤层气田11号煤层水化学场特征及其对煤层气的控制作用
李剑1,2, 车延前2, 熊先钺2, 王伟2, 李涛2, 王成旺2, 胡唤雨2
1 中国矿业大学(北京);
2 中石油煤层气有限责任公司
Hydrochemistry feld characteristic of 11# coal seam in Hancheng CBM feld and its controlling effect on CBM
Li Jian1,2, Che Yanqian2, Xiong Xianyue2, Wang Wei2, Li Tao2, Wang Chengwang2, Hu Huanyu2
1 China University of Mining and Technology(Beijing);
2 PetroChina Coalbed Methane Company Limited
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摘要 通过研究韩城煤层气田11号煤层水化学成分的变化规律,确定了该煤层水主要包括淡水淋滤作用为主的矿化度小于1000mg/L的NaHCO3型水,混合作用为主的矿化度为1000~3000mg/L的NaHCO3型水,溶滤作用为主的矿化度为3000~10000mg/L的Na2SO4型水和浓缩作用为主的矿化度大于10000mg/L的CaCl2型水,并结合构造特征将水化学场划分为HCO3-Na带、HCO3-Cl-Na带、SO4-Cl-Ca-Na带和Cl-Na带。对11号煤层水化学场与煤层含气量及煤层气井产能关系进行研究,发现Cl-Na带有利于煤层气富集,煤层气井产能效果好;HCO3-Na带不利于煤层气富集,煤层气井产能效果差。
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李剑
车延前
熊先钺
王伟
李涛
王成旺
胡唤雨
关键词 水化学场煤层水水型煤层气韩城    
Abstract:The change laws of hydrochemistry components of 11# coal seam in Hancheng coalbed methane (CBM) feld were investigated. It is determined that there are four types of coal seam water in this feld, including NaHCO3 type water (salinity lower than 1000 mg/L) dominated by fresh water leaching, NaHCO3 type water (salinity 1000-3000 mg/L) dominated by mixing, Na2SO4 type water (salinity 3000-10000 mg/L) dominated by lixivation and CaCl2 type water (salinity higher than 10000 mg/L) dominated by concentration. Then, combined with structural characteristics, the hydrochemistry feld was divided into four zones, including HCO3-Na Zone, HCO3-Cl-Na zone, SO4-Cl-Ca-Na zone and Cl-Na zone. Finally, the relationships of hydrochemistry feld of 11# coal seam vs. CBM content and CBM well productivity were studied. It is indicated that it is favorable for CBM enrichment in Cl-Na zone and the CBM well productivity is good. In HCO3-Na zone, however, it is not favorable for CBM enrichment and the CBM well productivity is poor.
Key wordshydrochemistry feld    coal seam water    water type    coalbed methane    Hancheng
收稿日期: 2016-11-08      出版日期: 2018-05-15
基金资助:中石油煤层气有限责任公司科技项目“韩城水文地质条件及其对煤层气开发影响”(2015KJ04)。
引用本文:   
李剑, 车延前, 熊先钺, 王伟, 李涛, 王成旺, 胡唤雨. 韩城煤层气田11号煤层水化学场特征及其对煤层气的控制作用[J]. 中国石油勘探, 2018, 23(3): 74-80.
Li Jian, Che Yanqian, Xiong Xianyue, Wang Wei, Li Tao, Wang Chengwang, Hu Huanyu. Hydrochemistry feld characteristic of 11# coal seam in Hancheng CBM feld and its controlling effect on CBM. China Petroleum Exploration, 2018, 23(3): 74-80.
链接本文:  
http://www.cped.cn/CN/10.3969/j.issn.1672-7703.2018.03.009      或      http://www.cped.cn/CN/Y2018/V23/I3/74
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