天然气地质学

四川盆地五峰组—龙马溪组富有机质泥岩孔径分布及其与页岩含气性关系

展开
  • 兰州大学地质科学与矿产资源学院&甘肃省西部矿产资源重点实验室,甘肃 兰州 730000
张瑜(1989-),女,湖北宜昌人,硕士研究生,主要从事石油与天然气地球化学研究. E-mail:yuzhang13@lzu.edu.cn.

收稿日期: 2015-04-28

  修回日期: 2015-05-22

  网络出版日期: 2015-09-10

基金资助

国家重点基础研究发展规划“973”项目(编号:2012CB214701);博士学科点专项科研基金(新教师)(编号:20120211120032);国家自然科学基金(编号:41202095)联合资助.

The Pore Size Distribution and Its Relationship with Shale Gas Capacity in Organic-rich Mudstone of Wufeng-Longmaxi Formation,Sichuan Basin

Expand
  • School of Earth Sciences & Key Laboratory of Western China′s Mineral Resources of Gansu Province, Lanzhou University,Lanzhou 730000,China

Received date: 2015-04-28

  Revised date: 2015-05-22

  Online published: 2015-09-10

摘要

选取四川盆地长宁县双河镇上奥陶统五峰组—下志留统龙马溪组新鲜露头样品23个,渝东南黔浅1井岩心样品14个,运用氮气吸附法进行了孔径分布表征,并结合TOC、矿物组成含量和含气量在垂向上的变化及相关性分析,探讨了控制页岩孔隙发育的主要影响因素及其与页岩含气性的关系。结果表明:页岩孔隙以四周开放的具有平行板结构的狭缝孔为主,平均孔径为3.76~8.53nm,主体孔径以2~30nm的介孔为主。总体来看,BET比表面积和孔体积在五峰组—龙马溪组底部大,向上减小并趋于稳定,与TOC变化趋势一致,呈较好正相关性,表明有机质是控制龙马溪组页岩孔隙发育的主要因素。在TOC含量相近时,黏土矿物含量高的样品具有更大的比表面积,页岩中纳米孔隙的发育同时受黏土矿物的影响。四川盆地五峰组—龙马溪组底部TOC和脆性矿物含量高,有机孔发育,页岩含气性好,是页岩气储层压裂改造的优选层位。

本文引用格式

张瑜,闫建萍,贾祥娟,李艳芳,邵德勇,于萍,张同伟 . 四川盆地五峰组—龙马溪组富有机质泥岩孔径分布及其与页岩含气性关系[J]. 天然气地球科学, 2015 , 26(9) : 1755 -1762 . DOI: 10.11764/j.issn.1672-1926.2015.09.1755

Abstract

Pore size distribution for 23 fresh outcrop shale samples collected from Shuanghe Town,Changning County and 14 core samples collected from the well Qianqian 1 in southeast Chongqing,Sichuan Basin were investigated by low pressure nitrogen adsorption.The main factors controlling pore development and gas accumulation in shales were discussed by integrating total organic carbon(TOC),mineralogy and shale gas content.The results show that open slit-like and parallel plate structure are major pore types with an average pore diameter of 3.76-8.53nm, and 2-30nm mesopores are dominated.The BET surface area and total pore volume are high in the Wufeng Formation and lower part of the Longmaxi Formation,and the decrease in the upper part of the Longmaxi Formation,in consistent with the trends of TOC,suggesting that organic matter is the key controlling factor on the shale pore development.In addition,samples with higher content of clay minerals but similar TOC content have larger specific surface area,and the clay-mineral-hosted pores are present.The Wufeng Formation and lower part of the Longmaxi Formation in the Sichuan Basin are preferred layers of shale reservoir fracturing because of high TOC,high rock brittleness and high gas content.

参考文献

[1]Jarvie D M,Hill R J,Ruble T E,et al.Unconventional shale-gas systems:The Mississippian Barnett Shale of north-central Texas as one model for thermogenic shale-gas assessment[J].AAPG Bulletin,2007,91(4):475-499.
[2]Montgomery S L,Jarvie D M,Bowker K A,et al.Mississippian Barnett Shale,Fort Worth Basin,north-central Texas:Gas-shale play with multi-trillion cubic foot potential[J].AAPG Bulletin,2005,89(2):155-175.
[3]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 evaluation[J].AAPG Bulletin,2008,92(1):87-125.
[4]Schettler Jr P D,Parmely C R.Contributions to total storage capacity in Devonian shales[C]//SPE Eastern Regional Meeting.Society of Petroleum Engineers,1991.
[5]Sondergeld C H,Ambrose R J,Rai C S,et al.Micro-structural studies of gas shales[C]//SPE Unconventional Gas Conference.Society of Petroleum Engineers,2010.
[6][JP2]Ross D J K,Marc Bustin R.The importance of shale composition and pore structure upon gas storage potential of shale gas reservoirs[J].Marine and Petroleum Geology,2009,26(6):916-927.
[7]Milner M,McLin R,Petriello J.Imaging texture and porosity in mudstones and shales:Comparison of secondary and ion-milled backscatter SEM methods[C]//Canadian Unconventional Resources and International Petroleum Conference.Society of Petroleum Engineers,2010.
[8]Schieber J.Common themes in the formation and preservation of intrinsic porosity in shales and mudstones-illustrated with examples across the Phanerozoic[C]//SPE Unconventional Gas Conference.Society of Petroleum Engineers,2010.
[9]Loucks R G,Reed R M,Ruppel S C,et al.Spectrum of pore types and networks in mudrocks and a descriptive classification for matrix-related mudrock pores[J].AAPG Bulletin,2012,96(6):1071-1098.
[10][JP2]Rouquerol J,Avnir D,Fairbridge C W,et al.Recommendations for the characterization of porous solids(Technical Report)[J].Pure and Applied Chemistry,1994,66(8):1739-1758.
[11]Yang Y,Aplin A C.Influence of lithology and compaction on the pore size distribution and modelled permeability of some mudstones from the Norwegian margin[J].Marine and Petroleum Geology,1998,15(2):163-175.
[12]Zhang Xiaolong,Li Yanfang,Lv Haigang,et al.Relationship between organic matter characteristics and depositional environment in the Silurian Longmaxi Formation in Sichuan Basin[J].Journal of Coal Society,2013,38(5):850-856.[张小龙,李艳芳,吕海刚,等.四川盆地志留系龙马溪组有机质特征与沉积环境的关系[J].煤炭学报,2013,38(5):851-856.]
[13]Rouquerol J,Llewellyn P,Rouquerol F.Is the BET equation applicable to microporous adsorbents[J].Studies in surface science and catalysis,2007,(160):49-56.
[14]Heng Shanjin,Fu Jianxiuwen,Zuo Tengzhengzhao,et al.The chemical structure of asphaltene derived from coal hydrogenation:Secondary hydrogenation reaction of asphaltene[J].The Chemical Society of Japan,1992,71(1):25-33.[横山晋,福[FJF]间[FJJ]秀文,佐藤正昭,等.アスファルテンの化学構造から誘導された石炭:アスファルテン二次水素化反応[J].日本エネルギー学会誌,1992,71(1):25-33.]
[15][JP2]Llewellyn P L,Bourrelly S,Serre C,et al.High uptakes of CO2 and CH4 in mesoporous metal organic frameworks MIL-100 and MIL-101[J].Langmuir,2008,24(14):7245-7250.
[16][JP2]Labani M M,Rezaee R,Saeedi A,et al.Evaluation of pore size spectrum of gas shale reservoirs using low pressure nitrogen adsorption,gas expansion and mercury porosimetry:A case study from the Perth and Canning Basins,Western Australia[J].Journal of Petroleum Science and Engineering,2013,112:7-16.
[17]Slatt R M,Abousleiman Y.Merging sequence stratigraphy and geomechanics for unconventional gas shales[J].The Leading Edge,2011,30(3):274-282.
[18]Groen J C,Peffer L A A,Pérez-Ramírez J.Pore size determination in modified micro-and mesoporous materials.Pitfalls and limitations in gas adsorption data analysis[J].Microporous and Mesoporous Materials,2003,60(1):1-17.
[19]Pu Boling,Dong Dazhong,Er Chuang,et al.Favorable reservoir characteristics of the Longmaxi shale in the southern Sichuan Basin and their influencing factors[J].Natural Gas Industry,2013,33(12):41-47.[蒲泊伶,董大忠,耳闯,等.川南地区龙马溪组页岩有利储层发育特征及其影响因素[J].天然气工业,2013,33(12):41-47.]
[20]Maliva R G,Siever R.Diagenetic replacement controlled by force of crystallization[J].Geology,1988,16(8):688-691.
[21][JP2]Bi He,Jiang Zhenxue,Li Peng,et al.Adsorption characteristic and influence factors of Longmaxi shale in southeastern Chongqing[J].Narural Gas Geoscience,2014,25(2):302-310.[毕赫,姜振学,李鹏,等.渝东南地区龙马溪组页岩吸附特征及其影响因素[J].天然气地球科学,2014,25(2):302-310.]
[22]Loucks R G,Reed R M,Ruppel S C,et al.Morphology,genesis,and distribution of nanometer-scale pores in siliceous mudstones of the Mississippian Barnett Shale[J].Journal of Sedimentary Research,2009,79(12):848-861.
[23]Blanc G,Bonneau S,Biagianti S,et al.Description of the larval stages of Anguillicola crassus(Nematoda,Dra-cunculoidea)using light and scanning electron microscopy[J].Aquatic Living Resources,1992,5(4):307-318.
[24]Tian H,Pan L,Xiao X,et al.A preliminary study on the pore characterization of Lower Silurian black shales in the Chuandong Thrust Fold Belt,southwestern China using low pressure N2 adsorption and FE-SEM methods[J].Marine and Petroleum Geology,2013,48:8-19.
[25]Yan Jianping,Zhang Tongwei,Li Yanfang,et al.Effect of the organic matter characteristics on methane adsorption in shale[J].Journal of Coal Society,2013,38(5):805-811.[闫建萍,张同伟,李艳芳,等.页岩有机质特征对甲烷吸附的影响[J].煤炭学报,2013,38(5):805-811.]
[26]Krishna R.Describing the diffusion of guest molecules inside porous structures[J].The Journal of Physical Chemistry C,2009,113(46):19756-19781.
[27]Xie Qingming,Chen Lijun,Liu Junfeng,et al.Well logging interpretation and evaluation of gas shale reservoir at Longmaxi Formation in Qianjiang area of Southeast of Chongqing area[J].Progress in Geophysics,2014(3):1312-1318.[谢庆明,程礼军,刘俊峰,等.渝东南黔江地区龙马溪组页岩气储层测井解释评价研究[J].地球物理学进展,2014(3):1312-1318.]
文章导航

/