新疆山前冲断带浅部与深部高挥发分烟煤孔隙结构表征对比研究

任艳泽; 李鑫; 谢安; 王子强; 王兴刚; 焦立新; 曹志雄; 李斌

doi:10.13568/j.cnki.651094.651316.2025.06.29.0001

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新疆山前冲断带浅部与深部高挥发分烟煤孔隙结构表征对比研究

新能源与绿色生产专题 | 更新时间：2026-01-21

- 新疆山前冲断带浅部与深部高挥发分烟煤孔隙结构表征对比研究
- 新疆山前冲断带浅部与深部高挥发分烟煤孔隙结构表征对比研究
- 新疆大学学报（自然科学版中英文） 2025年42卷第6期页码：654-664
- 作者机构：
  
  1. 新疆大学新疆中亚造山带大陆动力学与成矿预测自治区重点实验室
  2. 怀柔实验室新疆研究院
  3. 中国石油吐哈油田分公司勘探开发研究院
- 作者简介：
- 基金信息：
  
  新疆维吾尔自治区天山英才计划“新疆前陆冲断带深部煤系天然气形成机制与富集机理”（2022TSYCCX0043）;新疆维吾尔自治区科技重大专项“利用二氧化碳提高新疆难开采煤层气采收率技术体系研发”（2022A03015-3）
- DOI：10.13568/j.cnki.651094.651316.2025.06.29.0001
  中图分类号： P618.13
- 纸质出版：2025
- 稿件说明：
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[1]任艳泽,李鑫,谢安,等.新疆山前冲断带浅部与深部高挥发分烟煤孔隙结构表征对比研究[J].新疆大学学报(自然科学版中英文),2025,42(06):654-664.
[1]任艳泽,李鑫,谢安,等.新疆山前冲断带浅部与深部高挥发分烟煤孔隙结构表征对比研究[J].新疆大学学报(自然科学版中英文),2025,42(06):654-664. DOI： 10.13568/j.cnki.651094.651316.2025.06.29.0001.

DOI：10.13568/j.cnki.651094.651316.2025.06.29.0001.

摘要

煤岩孔隙结构对煤层气储集与渗流具有重要控制作用．基于恒速压汞、低温液氮吸附及低场核磁共振等测试，对比分析了新疆山前冲断带浅部与深部高挥发分烟煤（HVBC）样品孔隙-喉道结构差异及其对不同深度煤层气勘探开发的影响．结果如下：（1）恒速压汞实验表明，相对浅部HVBC样品，深部HVBC样品大孔半径峰值大于浅部，且喉道尺寸分布非均质性更强，孔喉半径比更大．（2）低温液氮实验表明，相对浅部HVBC样品，深部HVBC样品微孔和过渡孔弱于浅部，且主要发育贯通型圆柱孔和开放型层状孔．（3）低场核磁共振实验表明，相对浅部HVBC样品，深部HVBC样品中孔更为发育，大孔及裂隙发育较差．（4）浅部HVBC煤岩受成煤作用后煤层深埋作用与折返抬升作用影响，呈现微孔、过渡孔及大孔和裂隙发育程度更好且低孔喉半径比特征；相比之下，深部HVBC煤岩受深埋压实作用影响，呈现弱改造效应下的高孔喉半径比特征．

Abstract

The pore structure of coal plays a critical controlling role in coalbed methane storage and seepage.Based on constant-rate mercury intrusion porosimetry

low-temperature nitrogen adsorption

and low-field nuclear magnetic resonance tests

this study comparatively analyzes the differences in pore-throat structures between shallow and deep high-volatile bituminous coal(HVBC) samples from the foreland thrust belt of Xinjiang and their implications for coalbed methane exploration and development at varying depths. The key findings are as follows:(1) Constant-rate mercury intrusion porosimetry results indicate that

compared to shallow HVBC samples

deep HVBC samples exhibit a larger peak macropore radius

stronger heterogeneity in throat size distribution

and a higher pore-throat radius ratio.(2) Low-temperature nitrogen adsorption results reveal that deep HVBC samples have less developed micropores and mesopores than shallow's

with predominantly interconnected cylindrical pores and open slit-shaped pores.(3) Low-field nuclear magnetic resonance results demonstrate that deep HVBC samples contain more mesopores but fewer macropores and fractures compared to shallow's.(4) Shallow HVBC has betterdeveloped micropores

mesopores

macropores

and fractures

along with a lower pore-throat radius ratio

infiuenced by post-coalification deep burial followed by uplift and exhumation. In contrast

deep HVBC exhibits a high porethroat ratio under weak modification effects due to deep burial and compaction.

关键词

Keywords

references

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