非常规天然气

构造煤孔隙结构对煤层气产气特征的影响

展开
  • 中煤科工集团西安研究院有限公司,陕西 西安 710054
降文萍(1975-),女,山西介休人,研究员,博士,主要从事煤层气地质与开发研究. E-mail:jwp1225@126.com.

收稿日期: 2015-03-27

  修回日期: 2015-07-24

  网络出版日期: 2016-01-10

基金资助

十二五国家油气重大专项任务(编号:2011ZX05040-003-003);国家自然科学基金课题(编号:41302132)联合资助.

Effect on CBM drainage characteristics of pore structure of tectonic coal

Expand
  • Xi’an Research Institute of China Coal Technology and Engineering Group Corp,Xi’an 710054,China

Received date: 2015-03-27

  Revised date: 2015-07-24

  Online published: 2016-01-10

摘要

采用压汞实验和低温液氮吸附实验分析了构造煤的孔隙结构特征,结合地面煤层气抽采试验,探讨了孔隙对煤层气产气特征的影响。论文将煤中孔隙划分为4种类型:吸附孔隙(孔径小于10nm)、游离孔隙(孔径10~100nm)、扩散孔隙(孔径100~1 000nm)和渗流孔隙(孔径大于1 000nm)。研究发现构造煤孔隙系统呈“两极化”分布,即吸附孔隙、游离孔隙、渗流孔隙居多,扩散孔隙少;孔隙类型主要以圆筒形孔、墨水瓶形孔和狭缝平板形为主。构造煤的孔隙系统决定了煤中气体储集量大、但产出运移通道不畅,由此导致地面煤层气井排采过程中的波动产气特征。

本文引用格式

降文萍,张群,姜在炳,韩保山 . 构造煤孔隙结构对煤层气产气特征的影响[J]. 天然气地球科学, 2016 , 27(1) : 173 -179 . DOI: 10.11764/j.issn.1672-1926.2016.01.0173

Abstract

By the mercury injection test and low temperature liquid nitrogen adsorption test,combined with ground coalbed methane(CBM) drainage test,the coal pore structure characteristics and the influence on CBM drainage characteristics were studied.The pores in coal are divided into four types:The adsorption pores (pore size <10nm) and free porosity (pore size 10-100nm),diffusion porosity (pore size 100-1 000nm),seepage pore (pore size>1 000nm).The tectonic coal pore system has polorization distribution,that is,the adsorption pores,the free pores and the seepage pores are dominant,and the diffusion pores are minor.The pore types are mainly the cylinder shaped hole,the ink bottle shaped hole and the slit flat.The pore system of tectonic coal determines the characteristics of the more gas reservoir accumulation and the not unobstructed output channel,which leads to the fluctuation characteristics of the gas drainage of CBM ground well.

参考文献

[1]Prinz D,Littke R.Development of the micro-and ultramicroporous structure of coals with rank as deduced from the accessibility to water[J].Fuel,2005,84(12):1645-1652.
[2]Prinz D,Pyckhout-Hintzen W,Littke R.Development of the meso- and macroporous structure of coals with rank as analysed with small angle neutron scattering and adsorption experiments[J].Fuel,2004,83(4-5):547-556.
[3]Radlinski A P,Mastalerz M,Hinde A  L,et al.Thiyagarajan application of  SAXS  and  SANS in evaluation of porosity,pore size distribution and surface area of coal[J].International Journal of Coal Geology,2004,59(3-4):245-271.
[4]Gurdal G,Yalcin M N.Gas adsorption capacity of Carboniferous coals in the Zonguldak Basin and its controlling factors[J].Fuel,2000,79(15):1913-1924.
[5]Nakagawa T,Sakawa M,Nishikawa K,et al.Small angle X-ray scattering study on change of fractal property of Witbankcoal with heat treatment[J].Fuel,2000,79(11):1341-1346.
[6]Clarkson C R,Bustin R M.Effect of pore structure and gas pressure upon the transport properties of coal:A laboratory and modeling study Isotherms and pore volume distributions[J].Fuel,1999,78(11):1333-1344.
[7]Gu Min,Chen Changguo,Xian Xuefu.Study on the structure and fractal characteristics of forous material[J].Coal Conversion,2001,24(2):37-39.[辜敏,陈昌国,鲜学福.非均匀多孔介质表面变压过程的分形特征研究[J].煤炭转化,2001,24(2):37-39.]
[8]Wang Shengwei,Chen Zhonghui,Zhang Ming.Pore and microfracture of coal matrix and their effects on the recovery of methane from coal[J].Earth Science:Jounal of China University of Geosciences,1995,20(5):557-561.[王生维,陈钟惠,张明.煤基岩块孔裂隙特征及其在煤层气产出中的意义[J].地球科学:中国地质大学学报,1995,20(5):557-561.]
[9]Zhang Hui.Genetical type of proes in coal reservoir and its research significance[J].Jounal of China Coal Society,2001,26(1):40-44.[张慧.煤孔隙的成因类型及其研究[J].煤炭学报,2001,26(1):40-44.]
[10]Ju Yiwen,Jiang Bo,Hou Quanlin,et al.Structural evolution of nano-scale pores of tectonic coals in southern North China and its mechanism[J].Acta Geologica Sinica,2005,79(2):269-285.[琚宜文,姜波,侯泉林,等.华北南部构造煤纳米级孔隙结构演化特征及作用机理[J].地质学报,2005,79(2):269-285.]
[11]Ju Yiwen,Jiang Bo,Hou Quanlin,et al.Relationship between structure of coal and metamorphic deformation nanoscale environment[J].Chinese Science Bulletin,2005,50(17):1884-1892.[琚宜文,姜波,侯泉林,等.煤岩结构纳米级变形与变质变形环境的关系[J].科学通报,2005,50(17):1884-1892.]
[12]Hower J C.Observation on the role of Bemice coal field(Sullivan County,Pennsylvania)anthracites in the development of coallification theories in the Appalachians[J].International Journal of Coal Geology,1997,33(96):95-102.
[13]Duber S,Rouzaud J N.Calculation of reflectance values for two models of texture of carbon materials[J].International Journal of Coal Geolgy,1999,38(3):333-348.
[14]Huoduote B B.Coal and Gas Outburst[M].Translated by Song Shizhao,Wang Youan.Beijing:China Industry Press,1966.[霍多特,煤与瓦斯突出[M].宋士钊,王佑安,译.北京:中国工业出版社,1966.]
[15]Wu Jun.The research on the migration reservoir oil gas and micropore properties in coal[J].Science in China:Series B,1993,25(1):77-84.[吴俊.煤孔隙特征及其在油气运移储集关系的研究[J].中国科学:B辑,1993,25(1):77-84.]
[16]Fu Xuehai,Qin Yong,Xue Xiuqian.Research on fractals of pore and fracture-structure of coal resexvoirs[J].Journal of China University of Mining & Technology,2001,30(3):225-228.[傅学海,秦勇,薛秀谦,等.煤储层孔、裂隙系统分形研究[J],中国矿业大学学报,2001,30(3):225-228.]
[17]Fu Xuehai,Qin Yong,Zhang Wanhong.et al.Fractal classification and natural classification of coal pore structure based on migration of coalbed methane[J].Chinese Science Buttein,2005,50(supplement):51-55.[傅学海,秦勇,张万红,等.基于煤层气运移的煤孔隙分形分类及自然分类研究[J].科学通报,2005,50(增刊):51-55.]
[18]Yao Yanbin,Liu Dameng,Huang Wenhui,et al.Research on the pore-fractures system properties of coalbed methane reservoirs and recovery in Huainan and Huaibei Coalfields[J].Journal of China Coal Society,2006,31(2):163-168.[姚艳斌,刘大锰,黄文辉,等.两淮煤田煤储层孔—裂隙系统与煤层气产出性能研究[J].煤炭学报,2006,31(2):163-168.]
[19]Liu Zhidi,Zhao Jingzhou,Shi Baohong,et al.Study on the method of quatitative evaluation for “three qualities” of CBM reservoir using logging data:A case study from the Hanchengmine at the eastern edge of the Ordos Basin[J].Natural Gas Geoscience,2015,26(5):966-978.[刘之的,赵靖舟,时保宏,等.煤层气储层“三品质”测井定量评价方法研究——以鄂尔多斯盆地东缘韩城矿区为例[J].天然气地球科学,2015,26(5):966-978.]
[20]Guo Chen.Independent superposed CBM-bearing systems vertical distribution and coal reservoir adsorption & seepage characteristics in Bide-Santang Basin,western Guizhou[J].Natural Gas Geoscience,2015,26(1):168-179.[郭晨.黔西比德—三塘盆地独立叠置含煤层气系统垂向分布与煤储层吸附—渗流特征[J].天然气地球科学,2015,26(1):168-179.]
[21]Yuan Chongfu.Tectonic coal and coal and gas outburst[J].Gas Geology(Started),1985,(1):45-52.[袁崇孚.构造煤和煤与瓦斯突出[J].瓦斯地质(创刊号),1985,(1):45-52.]
[22]Jiang Wenping,Song Xiaozhong,Zhong Lingwen.Research on the pore properties of different coal body structure coals and on the effects of gas outburst based on the low-temperature nitrogen adsorption method[J].Journal of China Coal Society,2011,36(4):609-614.[降文萍,宋孝忠,钟玲文.基于低温液氮实验的不同煤体结构煤的孔隙特征及其对瓦斯突出影响的研究[J].煤炭学报,2011,36(4):609-614.]

文章导航

/