Porosity and Permeability of Paleozoic Mudstone and Shale in the Yangtze Block

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  • 1.School of Earth Sciences and Engineering,Nanjing University,Nanjing 210023,China;
    2.Institute of Geology,China Earthquake Administration,Beijing 100029,China;
    3.Research Institute of East China Branch Company,SINOPEC,Yangzhou 225100,China

Received date: 2015-04-28

  Revised date: 2015-05-22

  Online published: 2015-08-10

Abstract

We measured density,porosity and permeability of typical mudstone and shale samples from the Lower Cambrian Hetang Formation,Lower Ordovician Ningguo Formation,Middle Ordovician Hule Formation,Lower Silurian Longmaxi Formation,and Upper Permian Changqiao Formation in the Yangtze block.Our mudstone and shale samples have very low porosity between 0.73%-2.95%,and the effective porosity increases with pressure.Under the effective pressure of 10MPa,the matrix permeability of sample ranges from 1.25×10-22m2 to 7.15×10-22m2.The occurrence of microcracks can remarkably enhance the permeability of samples.Permeability of mudstone and shale decreases exponentially with increasing effective pressure,which can be attributed to the gradual closure of microcracks and pores with pressure.Hysteresis of effective porosity and permeability were observed during the pressurization-depressurization cycle.Below 20MPa,permeability derived from pore pressure oscillation method is significantly lower than that from the pressure pulse decay method.

Cite this article

ZHANG Wen,WANG Qin,YANG Xiao-song,DUAN Qing-bao,YE Jian-guo,LI Xia,ZHOU Jie . Porosity and Permeability of Paleozoic Mudstone and Shale in the Yangtze Block[J]. Natural Gas Geoscience, 2015 , 26(8) : 1534 -1539 . DOI: 10.11764/j.issn.1672-1926.2015.08.1534

References

[1]Pan Jiping,Qiao Dewu,Li Shizhen,et al.Shale gas geological conditions and exploration prospect of the Paleozoic marine strata in Lower Yangtze area,China[J].Geological Bulletin of China,2011,30(2/3):337-343.[潘继平,乔德武,李世臻,等.下扬子地区古生界页岩气地质条件与勘探前景[J].地质通报,2011,30(2/3):337-343.]
[2]Liu Dayong,Guo Huijuan,Peng Ping′an,et al.Characteristics and controlling factors of pore size distribution of the Lower Paleozoic shale rocks in Lower Yangtze area[J].Journal of China Coal Society,2013,38(5):778-782.[刘大永,郭慧娟,彭平安,等.下扬子地区下古生界页岩纳米孔隙特征及其控制因素[J].煤炭学报,2013,38(5):778-782.]
[3]Guo Tonglou,Zhang Hanrong.Formation and enrichment mode of Jiaoshiba shale gas field,Sichuan Basin[J].Petroleum Exploration and Development,2014,41(1):28-36.[郭彤楼,张汉荣.四川盆地焦石坝页岩气田形成与富集高产模式[J].石油勘探与开发,2014,41(1):28-36.]
[4]Wang Yuman,Dong Dazhong,Li Jianzhong,et al.Reservoir characteristics of shale gas in Longmaxi Formation of the Lower Silurian,southern Sichuan[J].Acta Petrolei Sinica,2012,33(4):551-560.[王玉满,董大忠,李建忠,等.川南下志留统龙马溪组页岩气储层特征[J].石油学报,2012,33(4):551-560.]
[5]Wang Jilin,Liu Guijian,Wang Weizhong,et al.Characteristics of pore-fissure and permeability of shales in the Longmaxi Formation in southeastern Sichuan Basin[J].Journal of China Coal Society,2013,38(5):772-777.[汪吉林,刘桂建,王维忠,等.川东南龙马溪组页岩孔裂隙及渗透性特征[J].煤炭学报,2013,38(5):772-777.]
[6]Cao Taotao,Song Zhiguang,Wang Sibo,et al.Physical property characteristics controlling factors of Permian shale reservoir in the Lower Yangtze Platform[J].Natural Gas Geoscience,2015,26(2):341-351.[曹涛涛,宋之光,王思波,等.下扬子地台二叠系页岩储集物性特征及控制因素[J].天然气地球科学,2015,26(2):341-351.]
[7]Cui X,Bustin A M M,Bustin R M.Measurements of gas permeability and diffusivity of tight reservoir rocks:different approaches and their applications[J].Geofluids,2009,9(3):208-223.
[8]Letham E A.Matrix Permeability Measurements of Gas Shales:Gas Slippage and Adsorption as Sources of Systematic Error[D].Vancouver:University of British Columbia,2011.
[9]Guo Nianfa.Evolutionary ground of basin and regional structure in Lower Yangtze area[J].Geology of Zhejiang,1996,12(2):19-27.[郭念发.下扬子盆地与区域地质构造演化特征及油气成藏分析[J].浙江地质,1996,12(2):19-27.]
[10]Tang Xianchun,Zeng Hui,Zhang Peixian,et al.Discussion about the gas bearing nature of the shale of Hetang Group in Xuancheng area[J].Reservoir Evaluation and Development,Reservoir Evaluation and Development,2011,1(1/2):78-84.[唐显春,曾辉,张培先,等.宣城地区荷塘组页岩含气性浅析[J].油气藏评价与开发,2011,1(1/2):78-84.]
[11]Zhang Tao,Yin Hongwei,Jia Dong,et al.Structural deformation characteristics and shale gas preservation of Lower Yangtze region[J].Journal of China Coal Society,2013,38(5):883-889.[张涛,尹宏伟,贾东,等.下扬子区构造变形特征与页岩气保存条件[J].煤炭学报,2013,38(5):883-889.]
[12]Zhang Chunming,Zhang Weisheng,Guo Yinghai.Sedimentary environment and its effect on hydrocarbon source rocks of Longmaxi Formation in southeast Sichuan and northern Guizhou[J].Earth Science Frontiers,2012,19(1):136-145.[张春明,张维生,郭英海.川东南—黔北地区龙马溪组沉积环境及对烃源岩的影响[J].地学前缘,2012,19(1):136-145.]
[13]Kranz R L,Saltzman J S,Blacic J D.Hydraulic diffusivity measurements on laboratory rock samples using an oscillating pore pressure method[C]//International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts,Pergamon,1990,27(5):345-352.
[14]Fischer G J,Paterson M S.Measurement of permeability and storage capacity in rocks during deformation at high temperature and pressure[J].International Geophysics,1992,51:213-252.
[15]Chen J,Yang X,Yao L,et al.Frictional and transport properties of the 2008 Wenchuan earthquake fault zone:Implications for coseismic slip-weakening mechanisms[J].Tectonophysics,2013,603(5):237-256.
[16][KG*5/6]Brace W,Walsh J B,Frangos W T,Permeability of granite under high pressure[J].Journal of Geophysical Research,1968,73(6):2225-2236.
[17]Jones S C.A technique for faster pulse-decay permeability measurements in tight rocks[J].SPE Formation Evaluation,1997,12(1):19-26.
[18]Ren Xiaoxia,Li Aifen,Wang Yongzheng,et al.Gas permeability experimental study of low permeability core considering effect of gas slippage[J].Natural Gas Geoscience,2015,26(4):733-736.[任晓霞,李爱芬,王永政,等.考虑滑脱效应的非稳态气体渗透性实验研究[J].天然气地球科学,26(4):733-736.]
[19][KG*7/8]David C,Wong T F,Zhu W,et al.Laboratory measurement of compaction-induced permeability change in porous rocks:Implication for the generationand maintenance of pore pressure excess in the crust[J].Pure Appl Geophys,1994,143(1-3):425-456.
[20]Dong J J,Hsu J Y,Wu W J,et al.Stress-dependence of the permeability and porosity of sandstone and shale from TCDP Hole-A[J].International Journal of Rock Mechanics and Mining Sciences,2010,47(7):1141-1157.
[21]Mckernan R E,Rutter E H,Mecklenburgh J,et al.Influence of effective pressure on mudstone matrix permeability:Implications for shale gas production[C]//SPE/EAGE European Unconventional Resources Conference and Exhibition.Society of Petroleum Engineers,2014.

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