页岩微孔结构及其对气体传质方式影响

陈强，康毅力，游利军，俞杨烽，刘洪林

doi:10.11764/j.issn.1672-1926.2013.06.1298

天然气地球科学 >

2013 , Vol. 24 >Issue 6: 1298 - 1304

DOI: https://doi.org/10.11764/j.issn.1672-1926.2013.06.1298

非常规天然气

页岩微孔结构及其对气体传质方式影响

展开

1.油气藏地质及开发工程国家重点实验室,西南石油大学,四川成都 610500；
2.中国石油勘探开发研究院廊坊分院,河北廊坊 065007

陈强(1988-)，男，四川三台人，硕士研究生，主要从事非常规气藏开发、储层保护理论与技术研究. E-mail:fdcchen@sina.cn.

收稿日期: 2013-01-24

修回日期: 2013-03-01

网络出版日期: 2013-12-10

基金资助

国家“973”计划项目(编号:2010CB226705)；国家科技重大专项(编号:2011ZX05018-005-003)联合资助.

收起

Micro-pore Structure of Gas Shale and Its Effect on Gas Mass Transfer

Expand

1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;
2.Langfang Branch，Research Institute of Petroleum Exploration and Development, PetroChina, Langfang 065007, China

Received date: 2013-01-24

Revised date: 2013-03-01

Online published: 2013-12-10

Fold

摘要

页岩复杂的孔隙结构对页岩气赋存状态、储量计算以及多尺度传质具有重要影响。运用压汞和氮气吸附法测定了页岩孔隙结构参数，基于不同孔径中的气体努森数，分析了孔隙尺度与页岩气传质方式的关系。结果表明:页岩压汞孔喉分布曲线呈现明显的三峰特征，直径小于100nm的纳米孔占页岩基块总储渗空间的80%~95%；页岩纳米孔平均直径为3.78~10.09nm，纳米孔具有巨大的BET比表面，77%~99%的比表面集中分布于孔径小于10nm的纳米孔内；基于气体动力学理论，在页岩多尺度孔隙中，页岩气的传质方式可划分为无滑脱渗流、存在滑脱渗流、过渡流动以及分子扩散，孔隙尺度控制着气体的传质方式；在页岩气藏开采的不同时期，不同孔隙尺度中的气体传质方式是动态变化的；在气藏开采中后期，页岩孔隙尺度是影响气体扩散类型和扩散系数的重要因素。 

关键词： 页岩; 孔隙结构; 传质; 多尺度; 努森数; 扩散

本文引用格式

陈强，康毅力，游利军，俞杨烽，刘洪林 . 页岩微孔结构及其对气体传质方式影响[J]. 天然气地球科学, 2013 , 24(6) : 1298 -1304 . DOI: 10.11764/j.issn.1672-1926.2013.06.1298

Abstract

The pore structures of gas shale have great significance to understand gas storage mechanisms,estimation of initial gas in-place and deliverability of multi-scaled pores.The micro-pore structure has been investigated through mercury injection capillary pressure (MICP) and nitrogen adsorption method.Then,the effect of pore diameter on shale gas mass transfer modes was analyzed in pores based on Knudsen number.The MICP results show that there are three peaks in pore-throat size distribution curves,and up to 90% of the total pore volumes are located in nanopores with pore diameter less than 100nm.Nitrogen adsorption analysis indicates that average diameter for nanopores ranges from 3.78nm to 10.09nm and 77% to 99% of the total BET surface areas mainly come from pores with size in diameter less than 10nm.Based on the theory of molecular dynamics,the modes of gas-transport controlled by pore dimension are summarized as four types: non-slip percolation,slip percolation,transition flow,and diffusion.The gas flow types in pores are variable during different development stages.And gas diffusion type and diffusivity within shale pores are greatly influenced by pore size at middle-late stage of shale gas reservoir.

Key words： Shale; Pore structure; Mass transfer; Multi-scale; Knudsen number; Diffusion

参考文献

［1］Luo Zhetan,Wang Yuncheng.Pore Structure of Oil and Gas Reservoir［M］.Beijing:Science Press,1986.［罗蛰潭,王允诚.油气储集层的孔隙结构［M］.北京:科学出版社,1986:1-255.］

［2］Ambrose R J,Hartman R C,Diaz-Campos M,et al.New Pore-scale Considerations for Shale Gas in Place Calculations［C］.SPE 131772,2010.

［3］Li Qiangui,Kang Yili,Yang Jian,et al.Study on temporal scales of mass transfer process in developing tight sandstone gas reservoirs［J］.Natural Gas Geoscience,2007,18(1):149-153.［李前贵,康毅力,杨建,等.致密砂岩气藏开发传质过程的时间尺度研究［J］.天然气地球科学,2007,18(1):149-153.］

［4］Li Xiaoyan,Xie Guangxin.Effect of pore structure on CBM transport-taking Qin Shui Basin as the example［J］.Natural Gas Geoscience,2004,15(4):341-344.［李小彦,解光新.孔隙结构在煤层气运移过程中的作用——以沁水盆地为例［J］.天然气地球科学,2004,15(4): 341-344.］ 

［5］Li Yanli.Calculation methods of shale gas reserves［J］.Natural Gas Geoscience,2009,22(3):466-470.［李艳丽.页岩气储量计算方法探讨［J］.天然气地球科学,2009,22(3):466-470.］

［6］Wang,Fred.Production Fairway:Speed Rails in Gas Shale［C］.Dallas,Texas:Presented at 7th Annual Gas Shales Summit,2008.

［7］Lin Jianzhong,Bao Fubing,Zhang Kai,et al.The Theory and Application of Micro and Nano Flows［M］.Beijing:Science Press,2010:10-13.［林建中,包福兵,张凯,等.微纳流动理论及应用［M］.北京:科学出版社,2010:10-13.］

［8］Yu Rongze,Zhang Xiaowei,Bian Yanan,et al.Flow mechanism of shale gas reservoirs and influential factors of their productivity［J］.Natural Gas Industry,2012,32(9):10-15.［于荣泽,张晓伟,卞亚南,等.页岩气藏流动机理与产能影响因素分析［J］.天然气工业,2012,32(9):10-15.］ 

［9］Wang Hai,Song Xiaoping,Liu Junjie,et al.Progress in certified reference materials for specific surface area,pore structures of porous and highly dispersed materials［J］.China Powder Science and Technology,2008,14(5):52-55.［王海,宋小平,刘俊杰,等.多孔和高分散材料比表面积、孔结构标准物质研究进展［J］.中国粉体技术,2008,14(5):52-55.］

［10］Bowker K A.Recent development of the Barnett shale play,Fort Worth Basin［J］.West Texas Geological Society Bulletin,2003,42(6):4-11.

［11］Loucks R G,Reed R M,Ruppel S C,et al.Morphology,genesis,and distribution of nanometer-scale pores in Siliceous mudstones of the Missippian Barnett shale［J］.Journal of Sedimentary Research,2009,79(12):848-861.

［12］Adesida A G,Akkutlu I Y,Daniel E,et al.Characterization of Barnett Shale Kerogen Pore Size Distribution Using DFT Analysis and Grand Canonical Monte Carlo Simulation［C］.SPE 147397,2011:1-14.

［13］Chalmers G R,Bustin R M.Lower Cretaceous gas shales in Northeastern British Columbia,Part I:Geological controls on methane sorption capacity［J］.Bulletin of Canadian Petroleum Geology,2008,56(1):1-21.

［14］Kondo,Ishikawa,Abe.Adsorption Science［M］.Li Guoxi,Translation.Beijing:Chemical Industry Press,2006:86-87.［近藤精一,石川达雄,安倍郁夫,等.吸附科学［M］.李国希,译.北京:化学工业出版社,2006:86-87.］

［15］Schttler P D,Parmely C R,Juniata C.Gas storage and transport in Devonian shales［J］.SPE Formation Evaluation,1989,4(3):371-376.

［16］Civan F.A Triple-mechanism Fractal Model with Hydraulic Dispersion for Gas Permeation in Tight Reservoir［C］.SPE 74368-MS,2002:1-17.

［17］Yang Jian,Kang Yili,Li Qiangui,et al.Characters of micro-structure and percolation in tight sandstone gas reservoirs［J］.Advances in Mechanics,2008,38(2):229-236.［杨建,康毅力,李前贵,等.致密砂岩气藏微观结构及渗流特征［J］.力学进展,2008,38(2):229-236.］

［18］Subrata Roy.Modelinggas flow through microchannels and nanopores［J］.Journal of Applied Physics,2003,93(8):4870-4879.

［19］Javapour F,Fisher D,Unsworth M.Nanoscale gas flow in shale sediments［J］.Journal of Canadian Petroleum Technology,2007,46(10):55-61.

［20］Sakhaee-Pour A,Steven L.Gas Permeability of Shale［C］.SPE 146944,2011:1-14.

［21］Sondergeld C H,Newsham K E,Comisky J T,et al.Petrophysical Considerations in Evaluating and Producing Shale Gas Resources［C］.SPE 131768,2010:1-34.

［22］Javapour F.Nanopores and apparent permeability of gas flow in mudrocks(shales and siltstone)［J］.Journal of Canadian Petroleum Technology,2009,48(8):16-21.

［23］He Xueqiu,Nie Baisheng.Diffusion mechanism of porous gases in coal seams［J］.Journal of China University of Mining & Technology,2001,30(1):1-4.［何学秋,聂百胜.孔隙气体在煤层中扩散的机理［J］.中国矿业大学学报,2001,30(1):1-4.］

［24］Yan Baozhen,Wang Yanbin,Ni Xiaoming.Coalbed methane diffusion characters based on nano-scaled pores under formation conditions［J］.Journal of China Coal Society,2008,33(6):657-660.［闫宝珍,王延斌,倪小明.地层条件下基于纳米级孔隙的煤层气扩散特征［J］.煤炭学报,2008,33(6):657-660.］

Options

文章导航

模态框（Modal）标题

摘要

本文引用格式

Abstract

参考文献