沁水盆地南部15号煤层和顶板K<sub>2</sub>灰岩水文地球化学演化特征

李忠城; 吴建光; 王建中; 吴翔; 卢国军

doi:10.3969/j.issn.1001-1986.2020.03.011

沁水盆地南部15号煤层和顶板K₂灰岩水文地球化学演化特征

中联煤层气有限责任公司，北京 100015

基金项目:

国家科技重大专项项目（2017ZX05064）

详细信息

作者简介:
李忠城,1971年生,男,河北唐山人,博士,高级工程师,从事煤层气地质与勘探开发工作.E-mail:zcliu0623@sina.com

中图分类号: P641.3
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出版历程
- 收稿日期: 2019-01-09
- 修回日期: 2019-07-15
- 发布日期: 2020-06-24

Hydrogeochemical evolution of No.15 coal seam and limestone K₂ in southern Qinshui basin

China United Coalbed Methane Corporation Ltd., Beijing 100015, China

Funds:

National Science and Technology Major Project(2017ZX05064)

摘要

摘要: 针对煤层气井产水量大、降压困难、产气效果不佳等问题，基于沁水盆地南部煤矿15号煤层顶板K₂灰岩水以及15号煤层气井水矿化度和离子数据，利用统计、对比方法，系统研究两者的水化学成分特征、类型、成因机理，建立了地层水演化模型，系统阐述灰岩和煤层水在补给区、径流区、滞流区发生的各种反应和作用。研究结果表明：K₂灰岩水和15号煤层水会发生离子交换、混合作用及CO₂作用，在补给区和强径流区，K₂灰岩水水型以Ca-Mg-HCO₃-SO₄型为主，煤层水水型以Na-HCO₃-SO₄型为主；缓径流区K₂灰岩水一般为Na-Ca-Cl-HCO₃型，而煤层水以Na-Cl-HCO₃或Na-HCO₃型为主；滞流区K₂灰岩水和煤层水水型相同，为Na-HCO₃或Na-Cl-HCO₃水型。研究结果为15号煤的煤层气开发提供可靠的水文地质依据。
- K₂灰岩水 /
- 15号煤层气井产出水 /
- 水类型 /
- 水演化模型 /
- 沁水盆地南部移动阅读
Abstract: Based on the water test data of No.15 coal roof K₂ limestone and No.15 coalbed methane well in the southern Qinshui basin, the characteristics, types and the genetic mechanism of water chemical composition were systematically studied by statistical and comparative methods. The evolution model was built to systematically describe the various reactions and effects of limestone and coalbed water in the recharge zone, runoff zone and detention zone. The results show that the K₂ limestone water and the No.15 coal seam water will undergo ion exchange, mixing and CO₂ action. The K₂ limestone water is mainly Ca-Mg-HCO₃-SO₄ type in the recharge zone and the strong runoff zone, and the water type of the coal seam is Na-HCO₃-SO₄ type; K₂ limestone water in slow-flow area is generally Na-Ca-Cl-HCO₃ type, while coalbed water is mainly Na-Cl-HCO₃ or Na-HCO₃ type; K₂ limestone water is the same as the coal seam water in detention area, and it is Na-HCO₃ or Na-Cl-HCO₃ water type. The study aims to provide a reliable hydrogeological basis for the development of No.15 coalbed methane.
- K₂ limestone water /
- water producing from the No.15 coal seam gas wells /
- water patern /
- water evolution model /
- southern Qinshui basin

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参考文献(20)

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