EN深部煤岩大分子结构与孔隙结构协同演化机制——以鄂尔多斯盆地石炭系本溪组为例
Co-evolution mechanism of macromolecular structure and pore structure in deep coal-rock:a case study of the Carboniferous Benxi Formation in Ordos Basin
- 石油学报 2025年46卷第10期 页码：1892-1905
- 作者机构：
1. 中国石油勘探开发研究院,北京,100083
2. 中国石油长庆油田公司勘探开发研究院,陕西,西安,710018
3. 中国矿业大学(北京)地球科学与测绘工程学院,北京,100083
- 作者简介：
- 基金信息：中国石油天然气股份有限公司科技重大专项"深地煤岩气成藏理论与效益开发技术研究"(2023ZZ18-03)和中国石油长庆油田公司科技重大专项"鄂尔多斯盆地深层煤岩气赋存机理;富集规律及有效提产关键技术攻关"(2023DZZ01)资助。
DOI：10.7623/syxb202510005
中图分类号： TE122.2-
网络出版：2025-11-04，
纸质出版：2025-11-04
- 稿件说明：
移动端阅览
徐旺林, 赵振宇, 虎建玲, 邵燕, 史云鹤, 张月巧, 方向, 孙远实, 刘宇. 深部煤岩大分子结构与孔隙结构协同演化机制——以鄂尔多斯盆地石炭系本溪组为例[J]. 石油学报, 2025, 46(10): 1892-1905.
Xu Wanglin, Zhao Zhenyu, Hu Jianling, et al. Co-evolution mechanism of macromolecular structure and pore structure in deep coal-rock:a case study of the Carboniferous Benxi Formation in Ordos Basin[J]. Acta petrolei sinica, 2025, 46(10): 1892-1905.
徐旺林, 赵振宇, 虎建玲, 邵燕, 史云鹤, 张月巧, 方向, 孙远实, 刘宇. 深部煤岩大分子结构与孔隙结构协同演化机制——以鄂尔多斯盆地石炭系本溪组为例[J]. 石油学报, 2025, 46(10): 1892-1905. DOI： 10.7623/syxb202510005.
Xu Wanglin, Zhao Zhenyu, Hu Jianling, et al. Co-evolution mechanism of macromolecular structure and pore structure in deep coal-rock:a case study of the Carboniferous Benxi Formation in Ordos Basin[J]. Acta petrolei sinica, 2025, 46(10): 1892-1905. DOI： 10.7623/syxb202510005.
摘要
鄂尔多斯盆地深部煤岩气(部分学者称之为深部煤层气)勘探实现万亿立方米级储量规模突破
其资源的赋存主要受煤岩大分子结构-孔隙结构协同演化机制控制。为揭示这一机制
选取成熟度连续分布的煤样[镜质体反射率(R
o
)为1.03%~1.96%
]
综合运用
13
C核磁共振谱、傅里叶变换红外光谱(FTIR)、高压压汞和N
2
/CO
2
吸附实验开展了多尺度煤岩大分子结构和孔隙结构表征。研究结果表明:①随着R
o
从1.03%增至1.96%
芳香碳含量由61.56%上升至69.72%
脂肪碳含量则从28.96%降至16.77%
FTIR谱图显示芳香结构的特征峰增强而脂肪族结构的特征峰减弱;②微孔作为煤岩气的核心吸附空间
贡献了85.32%~96.50%的孔体积和99%以上的比表面积
由此成为甲烷的主要赋存场所;③煤岩大分子结构-孔隙结构协同演化表现为脂肪链断裂与含氧官能团脱落抑制了介孔的发育
而芳构化与环缩合作用则促使微孔在芳香层片边缘富集
导致微孔的孔体积与芳香碳含量呈现出显著的正相关关系
介孔的孔体积则与脂肪碳含量呈正相关。研究揭示了深部煤岩储层"脂肪族结构裂解—芳香环缩合—微孔发育"的定向演化机制
为深层煤岩气"甜点"预测提供了理论支撑。
Abstract
A breakthrough has been achieved in exploration of the trillion-cubic-meter-scale reserves of deep coal-rock gas(some scholars call it as deep coalbed methane) in Ordos Basin. The resource occurrence is primarily controlled by the co-evolution mechanism of macromolecular structure and pore structure in coal-rock. To elucidate this mechanism
coal samples with a co
ntinuous maturity [vitrinite reflectance (R
o
)ranging from 1.03 % to 1.96 %
]
were selected. A comprehensive multi-scale characterization of coal-rock macromolecular structure and pore structure was conducted using
13
C nuclear magnetic resonance spectroscopy
Fourier-transform infrared spectrometry (FTIR)
high-pressure mercury intrusion test
and N
2
/CO
2
adsorption experiments. The research results show as follows. (1)As R
o
increases from 1.03 % to 1.96 %
the aromatic carbon content rises from 61.56 % to 69.72 %
while the aliphatic carbon content decreases from 28.96 % to 16.77 % . FTIR spectra reveal enhanced characteristic peaks of the aromatic structure and weakened characteristic peaks of the aliphatic structure. (2)Micropores
as the core adsorption space for coal-rock gas
contribute 85.32 % to 96.50 % of the pore volume and more than 99 % of the specific surface area
thus becoming the main occurrence site of methane. (3)The co-evolution of macromolecular structure and pore structure in coal-rock is manifested in the suppression of mesopore development by the breaking of aliphatic chains and the removal of oxygen-containing functional groups
while both aromatization and cyclization promote the accumulation of micropores at the edges of aromatic layers. This results in a significant positive correlation between micropore volume and aromatic carbon content
while mesopore volume shows a positive correlation with aliphatic carbon content. The study discovers the directional evolution mechanism of deep coal-rock reservoirs
characterized by aliphatic structure cracking
aromatic ring cyclization
and micropore development
providing theoretical support for the prediction of deep coal-rock gas "sweet spots".
关键词
Keywords
references
赵喆, 徐旺林, 赵振宇, 等.鄂尔多斯盆地石炭系本溪组煤岩气地质特征与勘探突破[J].石油勘探与开发, 2024, 51(2):234-247.
LI Song, QIN Yong, TANG Dazhen, et al.A comprehensive review of deep coalbed methane and recent developments in China[J].International Journal of Coal Geology, 2023, 279:104369.
ZHANG Kun, MENG Zhaoping, LIU Shimin, et al.Laboratory investigation on pore characteristics of coals with consideration of various tectonic deformations[J].Journal of Natural Gas Science and Engineering, 2021, 91:103960.
侯锦秀, 王宝俊, 张玉贵, 等.不同煤级煤的微孔介孔演化特征及其成因[J].煤田地质与勘探, 2017, 45(5):75-81.
MASTALERZ M, DROBNIAK A, STRAPOC ＇ D, et al.Variations in pore characteristics in high volatile bituminous coals:implications for coal bed gas content[J].International Journal of Coal Geology, 2008, 76(3):205-216.
SING K S W.Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity (Recommendations 1984)[J].Pure and Applied Chemistry, 1985, 57(4):603-619.
SONG Yu, JIANG Bo, LI Ming, et al.A review on pore-fractures in tectonically deformed coals[J].Fuel, 2020, 278:118248.
朱悦雯, 尚福华, 麻书玮, 等.不同煤级煤孔隙结构的非均质性及其影响因素[J].煤炭科学技术, 2025, 53(增刊1):173-182.
喻廷旭, 汤达祯, 许浩, 等.柳林矿区不同煤岩类型煤的孔隙特征[J].煤炭科学技术, 2013, 41(增刊2):362-366.
赵明恩, 梁国栋, 杨佳佳, 等.宏观煤岩类型和煤体结构控制下的孔隙结构特征研究[J].中国煤炭地质, 2024, 36(10):1-5.
曲闯, 左宇军, 于迪, 等.王庄煤矿不同破坏类型煤体结构差异性及其对瓦斯吸附性能的研究[J].煤矿开采, 2017, 22(6):88-91.
MATHEWS J P, CHAFFEE A L.The molecular representations of coal-a review[J].Fuel, 2012, 96:1-14.
姚素平, 焦堃, 张科, 等.煤纳米孔隙结构的原子力显微镜研究[J].科学通报, 2011, 56(22):1820-1827.
FENG Bo, BHATIA S K.Variation of the pore structure of coal chars during gasification[J].Carbon, 2003, 41(3):507-523.
LIU Yu, ZHU Yanming, CHEN Shangbin.Effects of chemical composition, disorder degree and crystallite structure of coal macromolecule on nanopores (0.4-150 nm)in different rank naturally-matured coals[J].Fuel, 2019, 242:553-561.
LIU Yu, ZHU Yanming, LI Wu, et al.Ultra micropores in macromolecular structure of subbituminous coal vitrinite[J].Fuel, 2017, 210:298-306.
郭晓娇, 王雷, 姚仙洲, 等.深部煤岩地质特征及煤层气富集主控地质因素——以鄂尔多斯盆地东部M区为例[J].石油实验地质, 2025, 47(1):17-26.
胡鑫, 姚卫江, 胡正舟, 等.准噶尔盆地白家海地区西山窑组深部煤岩储层孔隙结构表征及发育主控因素[J].中国石油大学学报(自然科学版), 2024, 48(4):12-23.
赵伟波, 刘洪林, 王怀厂, 等.煤层微观孔隙特征及沉积环境对孔隙结构的控制作用——以鄂尔多斯盆地8号煤层为例[J].煤炭科学技术, 2024, 52(6):142-154.
乔雨, 宋党育, 刘惟庆, 等.鄂尔多斯盆地东缘山西组煤系页岩孔隙结构特征及其演化规律研究[J].河南理工大学学报(自然科学版), 2024, 43(5):53-66.
付金华, 董国栋, 周新平, 等.鄂尔多斯盆地油气地质研究进展与勘探技术[J].中国石油勘探, 2021, 26(3):19-40.
牛海青.鄂尔多斯盆地煤层气富集成藏规律研究[D].青岛:中国石油大学(华东), 2010.
牛小兵, 喻健, 徐旺林, 等.鄂尔多斯盆地上古生界煤岩气成藏地质条件及勘探方向[J].天然气工业, 2024, 44(10):33-50.
费世祥, 崔越华, 李小锋, 等.鄂尔多斯盆地中、东部深层煤岩气水平井高效开发主控因素[J].石油与天然气地质, 2025, 46(1):273-287.
中国煤炭工业协会.煤的工业分析方法:GB/T 212—2008[S].北京:中国标准出版社, 2008.
中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会.煤的元素分析:GB/T 31391—2015[S].北京:中国标准出版社, 2015.
中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会.煤的镜质体反射率显微镜测定方法:GB/T 6948—2008[S].北京:中国标准出版社, 2009.
牛小兵, 范立勇, 闫小雄, 等.鄂尔多斯盆地煤岩气富集条件及资源潜力[J].石油勘探与开发, 2024, 51(5):972-985.
国家煤炭工业局.煤的挥发分产率分级:MT/T 849—2000[S].北京:中国煤炭工业出版社, 2001.
国家市场监督管理总局, 中国国家标准化管理委员会.煤炭质量分级第1部分:灰分:GB/T 15224.1—2018[S].北京:中国标准出版社, 2018.
国家煤炭工业局.煤的全水分分级:MT/T 850—2000[S].北京:煤炭工业出版社, 2000.
中国煤炭工业协会.中国煤炭分类:GB/T 5751—2009[S].北京:中国标准出版社, 2010.
谢克昌.煤结构与反应性[M].北京:科学出版社, 2002.
国家市场监督管理总局, 国家标准化管理委员会.岩石毛管压力曲线的测定:GB/T 29171—2023[S].北京:中国标准出版社, 2023.
CHEN Xiaozhen, LI Meifen, ZENG Fangui.Control of chemical structure on the characteristics of micropore structure in medium-rank coals[J].Fuel Processing Technology, 2022, 228:107162.
SONG Yu, JIANG Bo, MATHEWS J P, et al.Structural transformations and hydrocarbon generation of low-rank coal (vitrinite)during slow heating pyrolysis[J].Fuel Processing Technology, 2017, 167:535-544.
WANG Xiaoling, WANG Shaoqing, ZHAO Yungang, et al.Construction and verification of vitrinite-rich and inertinite-rich Zhundong coal models at the aggregate level:new insights from the spatial arrangement and thermal behavior perspective[J].RSC Advances, 2023, 13(11):7569-7584.
ERDENETSOGT B O, LEE I, LEE S K, et al.Solid-state C-13 CP/MAS NMR study of Baganuur coal, Mongolia:Oxygen-loss during coalification from lignite to subbituminous rank[J].International Journal of Coal Geology, 2010, 82(1/2):37-44.
CHEN Yanyan, MASTALERZ M, SCHIMMELMANN A.Characterization of chemical functional groups in macerals across different coal ranks via micro-FTIR spectroscopy[J].International Journal of Coal Geology, 2012, 104:22-33.
李霞, 曾凡桂, 王威, 等.低中煤级煤结构演化的FTIR表征[J].煤炭学报, 2015, 40(12):2900-2908.
陈萍, 唐修义.低温氮吸附法与煤中微孔隙特征的研究[J].煤炭学报, 2001, 26(5):552-556.
WANG Tao, TIAN Fenghua, DENG Ze, et al.The characteristic development of micropores in deep coal and its relationship with adsorption capacity on the eastern margin of the Ordos Basin, China[J].Minerals, 2023, 13(3):302.
THOMMES M, KANEKO K, NEIMARK A V, et al.Physisorption of gases, with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report)[J].Pure and Applied Chemistry, 2015, 87(9/10):1051-1069.
WANG Zhenyang, CHENG Yuanping, ZHANG Kaizhong, et al.Characteristics of microscopic pore structure and fractal dimension of bituminous coal by cyclic gas adsorption/desorption:an experimental study[J].Fuel, 2018, 232:495-505.
TENG Juan, MASTALERZ M, HAMPTON L.Maceral controls on porosity characteristics of lithotypes of Pennsylvanian high volatile bituminous coal:example from the Illinois Basin[J].International Journal of Coal Geology, 2017, 172:80-94.
LIU Tong, LIN Baiquan, SANG Shuxun, et al.Control mechanisms of macromolecular compositions and structures of coals on the evolution of nanopores during coalification[J].Energy & Fuels, 2024, 38(14):13002-13018.
VRANJES-WESSELY S, MISCH D, ISSA I, et al.Nanoscale pore structure of Carboniferous coals from the Ukrainian Donets Basin:a combined HRTEM and gas sorption study[J].International Journal of Coal Geology, 2020, 224:103484.
张松航, 汤达祯, 唐书恒, 等.鄂尔多斯盆地东缘煤储层微孔隙结构特征及其影响因素[J].地质学报, 2008, 82(10):1341-1349.
WANG Tao, DENG Ze, HU Haiyan, et al.Pore structure of deep coal of different ranks and its effect on coalbed methane adsorption[J].International Journal of Hydrogen Energy, 2024, 59:144-158.
李文华, 白向飞, 杨金和, 等.烟煤镜质组平均最大反射率与煤种之间的关系[J].煤炭学报, 2006, 31(3):342-345.
李增学.煤地质学[M].北京:地质出版社, 2009.
李明, 姜波, 秦勇, 等.构造煤中矿物质对孔隙结构的影响研究[J].煤炭学报, 2017, 42(3):726-731.
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