四川盆地平桥地区五峰—龙马溪组页岩微观孔隙特征研究

王运海

doi:10.11781/sysydz201803337

四川盆地平桥地区五峰—龙马溪组页岩微观孔隙特征研究

doi: 10.11781/sysydz201803337

王运海

中国石化华东油气分公司, 南京 210011

基金项目: 国家科技重大专项项目（2016ZX05061）“彭水地区常压页岩气勘探开发示范工程”资助。

详细信息

作者简介:
王运海(1975-),男,硕士,高级工程师,从事油气田地质与开发工作。E-mail:wyunhai@126.com。

中图分类号: TE122.23
计量
- 文章访问数: 1661
- HTML全文浏览量: 141
- PDF下载量: 350
- 被引次数: 0
出版历程
- 收稿日期: 2018-02-08
- 修回日期: 2018-05-10
- 刊出日期: 2018-05-28

Micro-pore characteristics of shale from Wufeng-Longmaxi formations in Pingqiao area, Sichuan Basin

WANG Yunhai

SINOPEC East China Branch Company, Nanjing, Jiangsu 210011

摘要

摘要: 基于氩离子抛光扫描电镜、吸附脱附实验等方法，对四川盆地平桥地区五峰组-龙马溪组下部页岩微观孔隙进行了研究。结果表明，富有机质的硅质页岩和碳质页岩微观孔隙以有机孔和微裂缝为主；孔隙结构相对复杂，孔隙形态丰富，孔径范围较大。吸附脱附实验显示，该页岩既有狭窄的平行板片状孔、少量的锥形平板孔和楔形孔，孔隙连通性相对差，又有规则开放圆孔与一端开口的墨水瓶状孔，孔隙开放性、连通性相对好。氩离子抛光扫描电镜法测量有机孔以细介孔为主且偏向微孔；吸附法测量比表面积为9～32.6 m²/g，平均18.0 m²/g，值偏低，BET法孔径为3.23～4.35 nm，BJH法孔容平均0.016 5 cm³/g，以细介孔为主，且偏向微孔界线。综合分析认为，研究区页岩储层微观孔隙以细介孔为主，且介孔和微孔贡献了绝大部分的比表面积。
- 孔隙类型 /
- 孔隙结构 /
- 页岩 /
- 五峰-龙马溪组 /
- 四川盆地
Abstract: The microscopic pore characteristics of shale from the lower Wufeng-Longmaxi formations in the Pingqiao area of the Sichuan Basin were studied using argon ion polished sample scanning electron microscopy and nitrogen adsorption-desorption experiments. Organic-rich siliceous shale and carbonaceous shale micro-pores are dominated by organic pores and micro-cracks. The pore structure is relatively complex, with rich pore morphology and a wide range of pore sizes. Argon ion polishing scanning electron microscopy showed that the organic pores are mainly thin and partly belong to micro-pores. Nitrogen adsorption-desorption experiments showed that the shale has narrow parallel plate-like holes, a small number of conical plate holes and wedge-shaped holes with a poor connectivity, and regular open round holes and ink bottle-shaped holes with open ends. The specific surface area measured by nitrogen adsorption-desorption experiments was 9-32.6 m²/g, with an average of 18.0 m²/g, which was low. The pore diameters measured by the BET method were 3.23 to 4.35 nm, and the average pore volume by the BJH method was 0.016 5 cm³/g. The fine meso-pores were dominant, and they were biased toward the micro-pore boundary. According to the comprehensive analysis, the microscopic pores of shale reservoirs in the study area are mainly mesoporous, and meso-pores and micro-pores contribute most of the specific surface area.
- pore type /
- pore structure /
- shale /
- Wufeng-Longmaxi formations /
- Sichuan Basin

HTML全文

参考文献(25)

[1]	邹才能,朱如凯,白斌,等.中国油气储层中纳米孔首次发现及科学价值[J].岩石学报,2011,27(6):1857-1864. ZOU Caineng,ZHU Rukai,BAI Bin,et al.First discovery of nano-pore throat in oil and gas reservoir in China and its scientific value[J]. Acta Petrologica Sinica,2011,27(6):1857-1864.
[2]	郭旭升,李宇平,刘若冰,等.四川盆地焦石坝地区龙马溪组页岩微观孔隙结构特征及其控制因素[J].天然气工业, 2014,34(6):9-16. GUO Xusheng,LI Yuping,LIU Ruobing,et al.Characteristics and controlling factors of micro-pore structures of Longmaxi shale play in the Jiaoshiba area,Sichuan Basin[J].Natural Gas Industry,2014,34 (6):9-16.
[3]	熊健,刘向君,梁利喜,等.四川盆地长宁地区龙马溪组上、下段页岩储层差异研究[J].西北大学学报(自然科学版),2015,45(4):623-630. XIONG Jian,LIU Xiangjun,LIANG Lixi,et al.On the differences of reservoir characteristics of the upper and the lower Longmaxi Formation shale in the Changning region of Sichuan Basin[J].Journal of Northwest University(Natural Science Edition),2015,45(4):623-630.
[4]	张烈辉,郭晶晶,唐洪明,等.四川盆地南部下志留统龙马溪组页岩孔隙结构特征[J].天然气工业,2015,35 (3):22-29. ZHANG Liehui,GUO Jingjing,TANG Hongming,et al.Pore structure characteristics of Longmaxi shale in the southern Sichuan Basin[J].Natural Gas Industry,2015,35 (3):22-29.
[5]	李笑天,潘仁芳,鄢杰,等.四川盆地长宁-威远页岩气示范区下志留统龙马溪组泥页岩吸附特征及影响因素分析[J].海相油气地质,2016,21(4):60-66. LI Xiaotian,PAN Renfang,YAN Jie,et al.Adsorptivity and influential factors of Lower Silurian Longmaxi gas-bearing shale in Changning-Weiyuan area,Sichuan Basin[J].Marine Origin Petroleum Geology,2016,21(4):60-66.
[6]	王玉满,黄金亮,李新景,等.四川盆地下志留统龙马溪组页岩裂缝孔隙定量表征[J].天然气工业,2015,35(9):8-15. WANG Yuman,HUANG Jinliang,LI Xinjing,et al.Quantitative characterization of fractures and pores in shale beds of the Lower Silurian,Longmaxi Formation,Sichuan Basin[J].Natural Gas Industry,2015,35(9):8-15.
[7]	于炳松.页岩气储层孔隙分类与表征[J].地学前缘,2013,20(4):211-220. YU Bingsong.Classification and characterization of gas shale pore system[J]Earth Science Frontiers,2013,20(4):211-220.
[8]	薛冰,张金川,唐玄,等.黔西北龙马溪组页岩微观孔隙结构及储气特征[J].石油学报,2015,36(2):138-149. XUE Bing,ZHANG Jinchuan,TANG Xuan,et al.Characteristics of microscopic pore and gas accumulation on shale in Longmaxi Formation,northwest Guizhou[J].Acta Petrolei Sinica,2015,36(2):138-149.
[9]	SLATT R M,O'BRIEN N R.Pore types in the Barnett and storage and Woodford gas shales:Contribution to understanding gas storage and migration pathways in fine-grained rocks[J].AAPG Bulletin,2011,95(12):2017-2030.
[10]	LOUCKS R G,REED R M,RUPPEL S C,et al.Spectrum of pore type and networks in mudrocks and a descriptive classification for matrix-related mud rock pores[J].AAPG Bulletin,2012,96(6):1071-1098.
[11]	SING K S W,EVERETT D H,HAUL R A W,et alReporting physisorption data for gas/solid systems with special reference to determination of surface area and porosity[J].Pure and Applied Chemistry,1985,57(4):603-611.
[12]	崔景伟,邹才能,朱如凯,等.页岩孔隙研究新进展[J].地球科学进展,2012,27(12):1319-1325. CUI Jingwei,ZOU Caineng,ZHU Rukai,et al.New advances in shale porosity research[J].Advances in Earth Science,2012,27(12):1319-1325.
[13]	伍岳,樊太亮,蒋恕,等.海相页岩储层微观孔隙体系表征技术及分类方案[J].地质科技情报,2014,33(4):91-97. WU Yue,FAN Tailiang,JIANG Shu,et al.Characterizing techniques and classification methods for microscope pore system in marine shale reservoir[J].Geological Science and Technology Information,2014,33(4):91-97.
[14]	赵佩,李贤庆,田兴旺,等.川南地区龙马溪组页岩气储层微孔隙结构特征[J].天然气地球科学,2014,25(6):947-956. ZHAO Pei,LI Xianqing,TIAN Xingwang,et al.Study on micropore structure characteristics of Longmaxi Formation shale gas reservoirs in the southern Sichuan Basin[J].Natural Gas Geoscience,2014,25(6):947-956.
[15]	GREGG S J,SING K S W.Adsorption surface area and porosity[M].2nd ed.London:Academic Press,1982.
[16]	魏祥峰,刘若冰,张廷山,等.页岩气储层微观孔隙结构特征及发育控制因素:以川南-黔北XX地区龙马溪组为例[J].天然气地球科学,2013,24(5):1048-1059. WEI Xiangfeng,LIU Ruobing,ZHANG Tingshan,et al.Micro-pores structure characteristics and development control factors of shale gas reservoir:A case of Longmaxi Formation in XX area of southern Sichuan and northern Guizhou[J].Natural Gas Geoscience,2013,24(5):1048-1059.
[17]	李卫兵,姜振学,李卓,等.渝东南页岩微观孔隙结构特征及其控制因素[J].特种油气藏,2016,23(2):50-54. LI Weibing,JIANG Zhenxue,LI Zhuo,et al.Micro-pore structure characteristics of shale in southeast Chongqing and the controlling factors[J].Special Oil & Gas Reservoirs,2016,23(2):50-54.
[18]	BROEKHOFF J C P,DE BOER J H.Studies on pore systems in cata-lysts:Pore distributions from the desorption branch of a nitrogen sorption isotherm in the case of cylindrical pores B.applications[J].Journal of Catalysis,1968,10(4):377-390.
[19]	ROSS D J K,BUSTIN R M.Characterizing the shale gas resource potential of Devonian Mississippian strata in the western Canada sedimentary basin:Application of an integrated formation evolution[J].AAPG Bulletin,2008,92(1):87-125.
[20]	BEHAR F,VANDENBROUCKE M.Chemical modelling of kerogens[J].Organic Geochemistry,1987,11(2):15-24.
[21]	苑丹丹,卢双舫,陈方文,等.渝东南地区彭页1井泥页岩微观孔隙结构特征[J].特种油气藏,2016,23(1):49-53. YUAN Dandan,LU Shuangfang,CHEN Fangwen,et al.Shale microscopic pore structure characterization in well Pengye 1 of southeast Chongqing[J].Special Oil & Gas Reservoirs,2016,23(1):49-53.
[22]	武瑾,梁峰,吝文,等.渝东北地区龙马溪组页岩储层微观孔隙结构特征[J].成都理工大学学报(自然科学版),2016,43(3):308-319. WU Jin,LIANG Feng,LIN Wen,et al.Characteristics of micropore structure of Longmaxi Formation shale gas reservoirs in northeast district of Chongqing, China[J].Journal of Chengdu University of Technology(Science & Technology Edition),2016,43(3):308-319.
[23]	魏国庆,李博,彭传圣,等.湖北来凤地区龙马溪组页岩微观孔隙结构特征[J].资源环境与工程,2016,30(2):188-193. WEI Guoqing,LI Bo,PENG Chuansheng,et al.Micro pore structure characteristics of Longmaxi Formation shale in Laifeng area of Hubei Province[J].Resources Environment & Engineering,2016,30(2):188-193.
[24]	张士万,孟志勇,郭战峰,等.涪陵地区龙马溪组页岩储层特征及其发育主控因素[J].天然气工业,2014,34(12):16-24. ZHANG Shiwan,MENG Zhiyong,GUO Zhanfeng,et al.Characteristics and major controlling factors of shale reservoirs in the Longmaxi Fm,Fuling area,Sichuan Basin[J].Natural Gas Industry,2014,34(12):16-24.
[25]	杨文新,李继庆,赵江艳,等.四川盆地涪陵地区龙马溪组页岩微观孔隙结构定性定量研究[J].石油实验地质,2018,40(1):97-102. YANG Wenxin,LI Jiqing,ZHAO Jiangyan,et al.Qualitative and quantitative study of micro-pore structures of Longmaxi Formation shale in Fuling area,Sichuan Basin[J].Petroleum Geology & Experiment,2018,40(1):97-102.