样品粉碎粒度对小角X-射线散射表征页岩孔隙结构的影响

doi:10.3969/j.issn.1006-6535.2026.04.005

特种油气藏 ›› 2026, Vol. 33 ›› Issue (4): 32-37.DOI: 10.3969/j.issn.1006-6535.2026.04.005

样品粉碎粒度对小角X-射线散射表征页岩孔隙结构的影响

王江^1,2,3, 韩辉^1,2,3,4, 文冉⁵, 聂尊浩⁶, 武文杰^1,2,3, 王逸兴^1,2,3, 何春臣^1,2,3, 何江^1,2,3

1.西南石油大学油气藏地质及开发工程全国重点实验室,四川成都 610500;
2.西南石油大学,四川成都 610500;
3.四川省天然气地质重点实验室,四川成都 610500;
4.中国石油非常规油气重点实验室西南石油大学储层评价分室,四川成都 610500;
5.四川长宁天然气开发有限责任公司,四川成都 610213;
6.中国石油西南油气田分公司,四川成都 610017

收稿日期:2024-11-07 修回日期:2026-05-24 出版日期:2026-08-25 发布日期:2026-10-15
通讯作者: 韩辉(1986—),男,教授,2008年毕业于长江大学地质学专业,2014年毕业于中国石油大学(北京)地质学专业,获博士学位,现从事非常规油气地质、油气地球化学研究工作。
作者简介:王江(2000—),男,2023年毕业于西南石油大学资源勘查工程专业,现为该校地质资源与地质工程专业在读硕士研究生,主要从事非常规油气地质、油气地球化学方面的研究工作。
基金资助:
四川省自然科学基金“四川盆地五峰—龙马溪组海相页岩有机质生气、成孔和石墨化机理研究”(2024NSFSC0088);国家自然科学基金“陆相页岩有机孔隙差异发育机理及效应研究”(41972161);中国石油-西南石油大学科技合作项目“四川盆地湖相页岩油地质评价参数、标准及体系研究”(2020CX050103)

Effect of sample crushing size on characterization of shale pore structure by small-angle X-ray scattering

Wang Jiang^1,2,3, Han Hui^1,2,3,4, Wen Ran⁵, Nie Zunhao⁶, Wu Wenjie^1,2,3, Wang Yixing^1,2,3, He Chunchen^1,2,3, He Jiang^1,2,3

1. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation,SouthwestPetroleum University,Chengdu,Sichuan 610500,China;
2. Southwest Petroleum University,Chengdu,Sichuan 610500,China;
3. Sichuan Key Laboratory of Natural Gas Geology,Chengdu,Sichuan 610500,China;
4. PetroChina Key Laboratory of Unconventional Oil & Gas,Reservoir Evaluation Branch,Southwest Petroleum University,Chengdu,Sichuan 610500,China;
5. Sichuan Changning Natural Gas Development Co.,Ltd.,Chengdu,Sichuan 610213,China;
6. PetroChina Southwest Oil & Gasfield Company,Chengdu,Sichuan 610017,China

Received:2024-11-07 Revised:2026-05-24 Online:2026-08-25 Published:2026-10-15

摘要/Abstract

摘要： 针对样品粉碎粒度对小角X-射线散射实验表征页岩孔隙结构的影响仍不明确的问题,以四川盆地龙马溪组页岩样品为研究对象,将样品粉碎成常用的4种粒径,对样品进行小角X-射线散射实验(SAXS)和低压氮气吸附实验检测封闭孔隙和开放孔隙。实验结果显示:随着样品粒径的减小,孔隙体积和分形维数也随之减小。这表明碎样操作会对孔隙产生破坏,尤其是尺寸较大的封闭孔隙,从而降低样品孔隙的非均质性及表面复杂程度。因此,为了获取真实的页岩孔隙结构信息,四川盆地龙马溪组页岩推荐使用20目的样品进行小角X-射线散射实验。研究结果对页岩小角X-射线散射的标准化及其结果的可对比性具有推动作用。

关键词: 粉碎粒径, 孔隙结构, 小角X-射线散射, 低压氮气吸附, 页岩

Abstract: At present,the influence of sample crushing size on the characterization of shale pore structure by small-angle X-ray scattering remains unclear.To solve this problem,shale samples from the Longmaxi Formation in the Sichuan Basin were selected as the research objects.The samples were crushed into four commonly used particle sizes.Small-angle X-ray scattering(SAXS)experiments were then carried out to characterize closed pores,and low-pressure nitrogen adsorption experiments were performed to characterize open pores.The experimental results show that,with decreasing sample particle size,both pore volume and fractal dimension decrease correspondingly.This indicates that sample crushing damages pores,especially larger closed pores,thereby reducing the heterogeneity and surface complexity of the sample pore system.Therefore,in order to obtain true information on shale pore structure,20-mesh samples from the Longmaxi Formation in the Sichuan Basin are recommended for small-angle X-ray scattering experiments.The results of this study will promote the standardization of small-angle X-ray scattering for shale and the comparability of the results obtained.

Key words: crushing particle size, pore structure, small-angle X-ray scattering, low-pressure nitrogen adsorption, shale

中图分类号:

TE122

王江, 韩辉, 文冉, 聂尊浩, 武文杰, 王逸兴, 何春臣, 何江. 样品粉碎粒度对小角X-射线散射表征页岩孔隙结构的影响[J]. 特种油气藏, 2026, 33(4): 32-37.

Wang Jiang, Han Hui, Wen Ran, Nie Zunhao, Wu Wenjie, Wang Yixing, He Chunchen, He Jiang. Effect of sample crushing size on characterization of shale pore structure by small-angle X-ray scattering[J]. Special Oil & Gas Reservoirs, 2026, 33(4): 32-37.

参考文献

[1] 许晨曦,薛海涛,李波宏,等.页岩气在矿物孔隙中的微观吸附机理差异性研究[J].特种油气藏,2020,27(4):79-84.
Xu Chenxi,Xue Haitao,Li Bohong,et al.Microscopic adsorption mechanism difference in the mineral pore of shale gas reservoir[J].Special Oil & Gas Reservoirs,2020,27(4):79-84.
[2] 梁峰,吴伟,张琴,等.四川盆地南部下寒武统筇竹寺组页岩孔隙结构特征与页岩气赋存模式[J].天然气工业,2024,44(3):131-142.
Liang Feng,Wu Wei,Zhang Qin,et al.Shale pore structure characteristics and shale gas occurrence pattern of the Lower Cambrian Qiongzhusi Formation in the southern Sichuan Basin[J].Natural Gas Industry,2024,44(3):131-142.
[3] 曹琰,金之钧,朱如凯,等.富有机质泥页岩孔隙结构研究进展及展望[J].沉积与特提斯地质,2024,44(2):231-252.
Cao Yan,Jin Zhijun,Zhu Rukai,et al.Progress and prospects in the research on pore structures of organic-rich mud shales[J].Sedimentary Geology and Tethyan Geology,2024,44(2):231-252.
[4] Mu Ying,Hu Zhiming,Guo Qiulei,et al.Water distribution in marine shales:based on two-dimensional nuclear magnetic resonance and low-temperature nitrogen adsorption[J].Energy & Fuels,2023,37(7):5034-5047.
[5] 管全中,董大忠,孙莎莎,等.深层富有机质页岩孔隙结构分形特征及其地质意义——以四川盆地威远地区下志留统龙马溪组为例[J].天然气工业,2024,44(3):108-118.
Guan Quanzhong,Dong Dazhong,Sun Shasha,et al.Fractal characteristics of organic-rich shale pore structure and its geological implications:a case study of the Lower Silurian Longmaxi Formation in the Weiyuan Block,Sichuan Basin[J].Natural Gas Industry,2024,44(3):108-118.
[6] Jitendra B,Debanjan C,Avik D,et al.Pore anisotropy in shale and its dependence on thermal maturity and organic carbon content:a scanning SAXS study[J].International Journal of Coal Geology,2023,273:104268.
[7] Sun Mengdi,Zhao Jiale,Pan Zhenjun,et al.Pore characterization of shales: a review of small angle scattering technique(review)[J].Journal of Natural Gas Science and Engineering,2020,78:103294.
[8] Chen Yanyan,Wei Lin,Mastalerz M,et al.The effect of analytical particle size on gas adsorption porosimetry of shale[J].International Journal of Coal Geology,2015,138:103-112.
[9] Han Hui,Cao Yan,Chen Shijia,et al.Influence of particle size on gas-adsorption experiments of shales:an example from a Longmaxi shale sample from the Sichuan Basin,China[J].Fuel,2016,186:750-757.
[10] Wei Mingming,Xiong Yongqiang,Zhang Li,et al.The effect of sample particle size on the determination of pore structure parameters in shales[J].International Journal of Coal Geology,2016,163:177-185.
[11] 田华,张水昌,柳少波,等.X射线小角散射法研究页岩成熟演化过程中孔隙特征[J].石油实验地质,2016,38(1):135-140,146.
Tian Hua,Zhang Shuichang,Liu Shaobo,et al.Evolution of pores in shale during thermal maturation using small angle X-ray scattering(SAXS)[J].Petroleum Geology & Experiment,2016,38(1):135-140,146.
[12] Debanjan C,Tuli B,Jitendra B,et al.Pore morphology in thermally-treated shales and its implication on CO₂ storage applications:a gas sorption,SEM,and small-angle scattering study[J].Fuel,2023,331:125877.
[13] Chandra D,Vishal V,Bahadur J,et al.A novel approach to identify accessible and inaccessible pores in gas shales using combined low-pressure sorption and SAXS/SANS analysis[J].International Journal of Coal Geology,2020,228:103556.
[14] Shu Yi,Xu Yanran,Jiang Shun,et al.Effect of particle size on pore characteristics of organic-rich shales:investigations from small-angle neutron scattering (SANS) and fluid intrusion techniques[J].Energies,2020,13(22):6049.
[15] 白斌,戴朝成,侯秀林,等.松辽盆地白垩系青山口组页岩层系非均质地质特征与页岩油“甜点”评价[J].石油与天然气地质,2023,44(4):846-856.
Bai Bin,Dai Chaocheng,Hou Xiulin,et al.Geological heterogeneity of shale sequence and evaluation of shale oil “sweet spots” in the Qingshankou Formation,Songliao Basin[J].Oil & Gas Geology,2023,44(4):846-856.
[16] 钟红利,卓自敏,张凤奇,等.鄂尔多斯盆地甘泉地区长7页岩油储层非均质性及其控油规律[J].特种油气藏,2023,30(4):10-18.
Zhong Hongli,Zhuo Zimin,Zhang Fengqi,et al.Heterogeneity of Chang 7 Shale Oil Reservoir and its oil control law in Ganquan,Ordos Basin[J].Special Oil & Gas Reservoirs,2023,30(4):10-18.
[17] Zheng Yijun,Liao Yuhong,Wang Jie,et al.Factors controlling the heterogeneity of shale pore structure and shale gas production of the Wufeng-Longmaxi shales in the Dingshan plunging anticline of the Sichuan Basin,China[J].International Journal of Coal Geology,2024,282:104434.
[18] Zhan Hongming,Li Xizhe,Hu Zhiming,et al.Fractal characteristics of deep shales in Southern China by small-angle neutron scattering and low-pressure nitrogen adsorption[J].Fractal and Fractional,2022,6(9):484.
[19] He Houfeng,Liu Pengcheng,Xu Liang,et al.Pore structure representations based on nitrogen adsorption experiments and an FHH fractal model:case study of the Block Z shales in the Ordos Basin,China[J].Journal of Petroleum Science & Engineering,2021,203:108661.
[20] Martin J E.Scattering exponents for polydisperse surface and mass fractals[J].Journal of Applied Crystallography,1986,19(1):25-27.
[21] Bodhisatwa H,David A,Vikram V,et al.Pore characteristics of distinct thermally mature shales:influence of particle size on low-pressure CO₂ and N₂ adsorption[J].Energy & Fuels,2018,32(8):8175-8186.
[22] Wang Yang,Liu Luofu,Cheng Hongfei.Gas adsorption characterization of pore structure of organic-rich shale:insights into contribution of organic matter to shale pore network[J].Natural Resources Research,2021,30(3):2377-2395.
[23] Sun Mengdi,Yu Bingsong,Hu Qinghong,et al.Pore characteristics of Longmaxi Shale Gas Reservoir in the northwest of Guizhou,China:investigations using small-angle neutron scattering(SANS),helium pycnometry,and gas sorption isotherm[J].International Journal of Coal Geology,2017,171:61-68.
[24] Yang Rui,He Sheng,Yi Jizheng,et al.Nano-scale pore structure and fractal dimension of organic-rich Wufeng-Longmaxi shale from Jiaoshiba Area,Sichuan Basin:investigations using FE-SEM,gas adsorption and helium pycnometry[J].Marine and Petroleum Geology,2016,70:27-45.
[25] Han Hui,Guo Chen,Zhong Ningning,et al.A study on fractal characteristics of lacustrine shales of Qingshankou Formation in the Songliao Basin,northeast China using nitrogen adsorption and mercury injection methods[J].Journal of Petroleum Science and Engineering,2020,193:107378.

样品粉碎粒度对小角X-射线散射表征页岩孔隙结构的影响

Effect of sample crushing size on characterization of shale pore structure by small-angle X-ray scattering

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	刘厚彬, 杜爽, 张立双, 王帅, 崔帅. 基于精细地质模型的水平井压裂区采气过程渗流-应力耦合有限元模拟[J]. 特种油气藏, 2026, 33(4): 122-131.
[2]	欧阳勇, 张鹏鑫, 王婷婷, 曾栩洋, 李腾. 鄂尔多斯盆地陇东页岩油水平井压裂交变力学与固井二界面失效特征[J]. 特种油气藏, 2026, 33(4): 132-138.
[3]	朱崇利, 李亭, 刘兵, 杨波, 耿力奇. 页岩微裂缝表征与预测技术发展现状及趋势[J]. 特种油气藏, 2026, 33(3): 1-12.
[4]	刘亿, 李宜真, 郝越翔, 江雨濛, 陈雪. 威远地区龙马溪组富有机质页岩气储层特征及其对含气量的影响[J]. 特种油气藏, 2026, 33(3): 34-43.
[5]	龚辰, 陈守春, 刘如昊, 李世临, 冯亮, 张雷, 王鑫锐, 王仲旭. 川东北地区凉高山组页岩孔隙结构表征及优势储层形成机理[J]. 特种油气藏, 2026, 33(3): 44-54.
[6]	杨二龙, 殷世潭, 王宇, 王贤君, 董驰. 基于RIME-XGBoost的泥页岩油产量预测方法[J]. 特种油气藏, 2026, 33(3): 62-71.
[7]	刘秀婵, 张添锦, 赵帮胜, 王雨欣. 不同驱油方式下提高页岩油采收率实验评价[J]. 特种油气藏, 2026, 33(3): 79-88.
[8]	刘建峰, 齐宁, 郭楠, 苏建, 蒋平, 陈铭, 李爱华. 页岩油储层层理与天然裂缝对压裂裂缝扩展影响数值模拟研究[J]. 特种油气藏, 2026, 33(3): 89-97.
[9]	上官自然, 李红涛, 吴生军, 李皋, 窦正道, 王建, 付成林. 考虑水化效应的页岩压裂水平井套管变形位置预测方法[J]. 特种油气藏, 2026, 33(3): 106-114.
[10]	李刚. 页岩油水平井规模压裂后闷井时间及排采制度优化[J]. 特种油气藏, 2026, 33(3): 115-123.
[11]	张海杰, 王欣桐, 蒲俊伟, 罗远平, 丁奕, 李悦, 何兴, 全航. 渝西足201井区深层页岩气藏水平井压裂裂缝扩展及施工参数优化[J]. 特种油气藏, 2026, 33(3): 132-139.
[12]	慈建发, 于浩, 汤思杰, 李年银. 页岩气藏水平井多段压裂套管变形损坏模拟研究[J]. 特种油气藏, 2026, 33(3): 149-157.
[13]	亓倩, 朱维耀. 多尺度页岩储层岩石应力敏感因素与流固耦合渗流模型[J]. 特种油气藏, 2026, 33(3): 158-165.
[14]	黄正鑫, 张晓丽, 杨兆彪, 何金先, 吴蒙, 曹文杰, 李聚豪. 黔西地区龙潭组煤系致密砂岩储层微观孔隙结构特征及成因[J]. 特种油气藏, 2026, 33(2): 44-53.
[15]	崔传智, 钱银, 吴忠维, 王俊康, 张世明, 吕琦, 程紫燕. 页岩油藏CO₂前置压裂对裂缝网络的影响[J]. 特种油气藏, 2026, 33(2): 72-78.