西山煤田古交矿区煤层气藏水文地质特征及其控气作用
P618.11; 煤层气藏的水文地质条件是控制煤层气运移、散失、分布和富集的重要因素之一.以西山煤田古交矿区为研究对象,分析产出水离子浓度、水质水型、矿化度和煤层含气量分布特征,结合地下水动力场分布特征,划分区域水文地质单元,并讨论不同单元内含气量分布特征及地质控制机理.结果表明:①该区煤层气井产出水离子以Na+,HCO3-为主,水型主要为NaHCO3型,该区煤层气井产出水矿化度介于632 ～2512 mg/L,属于淡水-微咸水;②根据折算水位和矿化度分布特征将矿区划分为补给径流区、滞留区以及过渡地带的弱径流区3种水文地质单元,滞留区含气量最高,弱径流区次之;③古交矿区煤层气的富集成藏受构造、...
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| Published in | 煤炭学报 Vol. 43; no. 3; pp. 759 - 769 |
|---|---|
| Main Authors | , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
太原理工大学矿业工程学院 山西太原030024
01.03.2018
煤与煤系气地质山西省重点实验室 山西太原030024%山西省地质矿产研究院 山西太原030024 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 0253-9993 |
| DOI | 10.13225/j.cnki.jccs.2017.0772 |
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| Abstract | P618.11; 煤层气藏的水文地质条件是控制煤层气运移、散失、分布和富集的重要因素之一.以西山煤田古交矿区为研究对象,分析产出水离子浓度、水质水型、矿化度和煤层含气量分布特征,结合地下水动力场分布特征,划分区域水文地质单元,并讨论不同单元内含气量分布特征及地质控制机理.结果表明:①该区煤层气井产出水离子以Na+,HCO3-为主,水型主要为NaHCO3型,该区煤层气井产出水矿化度介于632 ～2512 mg/L,属于淡水-微咸水;②根据折算水位和矿化度分布特征将矿区划分为补给径流区、滞留区以及过渡地带的弱径流区3种水文地质单元,滞留区含气量最高,弱径流区次之;③古交矿区煤层气的富集成藏受构造、水文地质条件双重控制,在屯兰中部形成单斜-水力封堵型煤层气藏,为全区煤层气最为富集区,东曲断层比较发育,形成地垒-水力封堵型煤层气藏,为煤层气较为富集区. |
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| AbstractList | P618.11; 煤层气藏的水文地质条件是控制煤层气运移、散失、分布和富集的重要因素之一.以西山煤田古交矿区为研究对象,分析产出水离子浓度、水质水型、矿化度和煤层含气量分布特征,结合地下水动力场分布特征,划分区域水文地质单元,并讨论不同单元内含气量分布特征及地质控制机理.结果表明:①该区煤层气井产出水离子以Na+,HCO3-为主,水型主要为NaHCO3型,该区煤层气井产出水矿化度介于632 ～2512 mg/L,属于淡水-微咸水;②根据折算水位和矿化度分布特征将矿区划分为补给径流区、滞留区以及过渡地带的弱径流区3种水文地质单元,滞留区含气量最高,弱径流区次之;③古交矿区煤层气的富集成藏受构造、水文地质条件双重控制,在屯兰中部形成单斜-水力封堵型煤层气藏,为全区煤层气最为富集区,东曲断层比较发育,形成地垒-水力封堵型煤层气藏,为煤层气较为富集区. |
| Abstract_FL | Hydrogeological condition is one of the most important factors controlling the migration,dispersion,distribution and accumulation of coalbed methane (CBM) in coal reservoir.In this paper,the water produced from CBM wells in Gujiao mining area was monitored in terms of concentrations,water quality and salinity.Then,combined with the local gas content and the distribution characteristics of groundwater,the geological controlling mechanisms on gas distribution characteristics in different units were discussed.Results show that the main ions of produced water were Na+,HCO3-and the type was NaHCO3.The total dissolved solids (TDS) of produced water were relatively lower,which ranged from 632 to 2512 mg/L,belonging to freshwater-saline water.The research area were divided into runoff zone,weak runoff zone and stagnant zone,and the stagnant zone according to discounted water level and TDS.The stagnant zone had the highest gas content,while the gas content in the weak runoff zone was relatively lower.The enrichment of Gujiao mining area was controlled by structure and hydrogeological conditions.Now two hydraulic patterns were identified:The monocline-hydraulic sealing in the central of Malan was the richest area and the horst-hydraulic sealing in Dongqu was the richer area. |
| Author | 孙蓓蕾 曾凡桂 张鹏 夏鹏 游永键 朱亚茹 |
| AuthorAffiliation | 太原理工大学矿业工程学院 山西太原030024;煤与煤系气地质山西省重点实验室 山西太原030024%山西省地质矿产研究院 山西太原030024 |
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| Author_FL | ZENG Fangui YOU Yongjian SUN Beilei XIA Peng ZHANG Peng ZHU Yaru |
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| DocumentTitle_FL | Hydrogeological characteristics of CBM reservoirs and their controlling effects in Gujiao Mining Area, Xishan Coalfield |
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| Keywords | gas content 古交矿区 煤层气 gas control 水文地质特征 产出水矿化度 TDS of groundwater Xishan Coal Field 含气量 CBM Gujiao Mining Area 控气作用 西山煤田 hydrogeology characteristics |
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| PublicationTitle | 煤炭学报 |
| PublicationTitle_FL | Journal of China Coal Society |
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| Publisher | 太原理工大学矿业工程学院 山西太原030024 煤与煤系气地质山西省重点实验室 山西太原030024%山西省地质矿产研究院 山西太原030024 |
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| Snippet | P618.11; 煤层气藏的水文地质条件是控制煤层气运移、散失、分布和富集的重要因素之一.以西山煤田古交矿区为研究对象,分析产出水离子浓度、水质水型、矿化度和煤层含气量分布特... |
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| Title | 西山煤田古交矿区煤层气藏水文地质特征及其控气作用 |
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