基于X-CT技术对黔西滇东区域煤储层物性特征的研究

熊波; 刘坤; 郭凯; 赵广民

doi:10.11781/sysydz201603407

基于X-CT技术对黔西滇东区域煤储层物性特征的研究

doi: 10.11781/sysydz201603407

熊波^1,2,
刘坤²,
郭凯³,
赵广民⁴

1.
中国石油大学(北京) 石油工程学院, 北京 102249
2. 中国石油勘探开发研究院廊坊分院, 河北廊坊 065007
3. 中国石油天然气与管道分公司, 北京 100007
4. 长庆油田分公司油气工艺研究院, 西安 710021

基金项目: 国家自然科学基金面上项目(41272175)资助。

详细信息

作者简介:
熊波(1979-),男,高级工程师,从事煤层气地质勘探工作。E-mail:xiongbo69@petrochina.com.cn。

中图分类号: TE135
计量
- 文章访问数: 925
- HTML全文浏览量: 95
- PDF下载量: 849
- 被引次数: 0
出版历程
- 收稿日期: 2015-11-25
- 修回日期: 2016-03-12
- 刊出日期: 2016-05-28

Characterization of the physical properties of coal reservoirs in the western Guizhou and eastern Yunnan by X-ray computed tomography

1.
School of Petroleum Engineering, China University of Petroleum(Beijing), Beijing 102249, China
2. Langfang Branch of Research Institute of Petroleum Exploration and Development, PetroChina, Langfang, Hebei 065007, China
3. Natural Gas & Pipeline Company, PetroChina, Beijing 100007, China
4. Oil & Gas Technology Research Institute of Changqing Oilfield, Xi'an, Shaanxi 710021, China

摘要

摘要: 黔西滇东区域是我国煤层气勘探开发的资源潜力区,近年来煤层气勘探和矿场试验显示该区具有良好的煤层气勘探开发潜力。通过X-CT技术系统研究了该区的煤储层物性特征。研究表明,X-CT扫描技术可以很好地识别矿物、暗煤、镜煤和孔隙这4种介质,它们的CT数分别为:>1 800,1 500~1 800,1 000~1 500,<1 000 HU,但是具体CT数又因样品而异;通过X-CT扫描技术估算得到的煤孔隙度值为3.33%~7.14%,矿物含量为0.11%~89.03%,与氦气法和工业分析法得到的结果相关性很好; X-CT切片分析结果显示在应力作用下,原生煤具有最强的均质性,糜棱煤具有最强的非均质性,初碎裂煤和碎裂煤介于两者之间,表明煤岩在没有受到应力作用之前,煤岩组成在轴向上的均质性相对较好,后期的应力作用造成了煤中的煤岩组分、孔裂隙以及矿物的分布不均匀,煤岩非均质性增强;通过煤储层三维模型的建立,定量表征了研究区煤中矿物质、孔隙以及裂隙的空间分布特征,实现了煤储层的三维可视化。
- X-CT /
- 物性特征 /
- 均质性 /
- 三维模型 /
- 煤储层 /
- 黔西滇东
Abstract: The western Guizhou and eastern Yunnan are potential exploration areas for coal bed methane (CBM) in South China, and their favorable CBM potential has been demonstrated by CBM exploration and pilot tests. In this paper, the physical properties of coal reservoirs in the study area were systematically studied by means of X-ray computed tomography (X-CT). The research showed that X-CT could identify 4 kinds of media: mineral, durain, vitrain and pore. The CT number of mineral, durain, vitrain and pore were approximately >1 800, 1 500-1 800, 1 000-1 500 and <1 000 Hounsfield unit (HU), respectively. Their specific CT number varied from sample to sample. The estimated porosity values of coals ranged from 3.33% to 7.14%, and mineral contents ranged from 0.11% to 89.03% by means of X-CT, which correlated well with the porosities determined using the helium gas method and proximate analysis. X-CT scans showed that under the influence of stress, undeformed coal has the highest homogeneity, mylonitic coal has the highest heterogeneity, and proto-cataclastic and cataclastic coals were between them. If coals were not affected by stress, their composition heterogeneity in the axial direction was relatively good. The later stress action caused the uneven distribution of coal components, pores, fractures and minerals, which enhanced the heterogeneity of coals. A three-dimensional model of coals was built to show the quantification and 3D visualization of the spatial disposition of minerals, pores and fractures of coals in these areas.
- X-CT /
- physical properties /
- homogeneity /
- three-dimensional models /
- coal reservoir /
- western Guizhou and eastern Yunnan

HTML全文

参考文献(22)

[1]	姚艳斌,刘大锰,蔡益栋,等.基于NMR和X-CT的煤的孔裂隙精细定量表征[J].中国科学(地球科学),2010,40(11):1598-1607. Yao Yanbin,Liu Dameng,Cai Yidong,et al.Advanced characterization of pores and fractures in coals by nuclear magnetic resonance and X-ray computed tomography[J].Science China (Earth Sciences),2010,53(6):854-862.
[2]	陈同刚,汤达祯,许浩,等.基于X-CT技术的韩城示范区煤储层精细描述[J].高校地质学报,2012,18(3):505-510. Chen Tonggang,Tang Dazhen,Xu Hao,et al.Detailed description of Hancheng coal reservoirs based on the X-CT technology[J].Geological Journal of China Universities,2012,18(3):505-510.
[3]	张敏,孙明霞.CT技术在油气勘探领域中的应用[J].大庆石油地质与开发,2002,21(2):15-16. Zhang Min,Sun Mingxia.Application of X-ray CT technique to petroleum exploration[J].Petroleum Geology & Oilfield Development in Daqing,2002,21(2):15-16.
[4]	张虹,董国臣,王松洋,等.浅析显微CT技术在油气储层研究中的应用[J].资源与产业,2013,15(6):98-102. Zhang Hong,Dong Guochen,Wang Songyang,et al.Application of microscopic CT in oil-gas reservoir study[J].Resources & Industries,2013,15(6):98-102.
[5]	陈贞龙,汤达祯,许浩,等.黔西滇东地区煤层气储层孔隙系统与可采性[J].煤炭学报,2010,35(S):158-163. Chen Zhenlong,Tang Dazhen,Xu Hao,et al.The pore system properties of coalbed methane reservoirs and recovery in western Guizhou and eastern Yunnan[J].Journal of China Coal Society,2010,35(S):158-163.
[6]	张官亮,张祖波,刘庆杰,等.利用CT扫描技术研究层内非均质油层聚合物驱油效果[J].油气地质与采收率,2015,22(1):78-83. Zhang Guanliang,Zhang Zubo,Liu Qingjie,et al.Study on effects of polymer flooding on layered heterogeneous reservoirs using CT scanning[J].Petroleum Geology and Recovery Efficiency,2015,22(1):78-83.
[7]	韩文学,高长海,韩霞.核磁共振及微、纳米CT技术在致密储层研究中的应用:以鄂尔多斯盆地长7段为例[J].断块油气田,2015,22(1):62-66. Han Wenxue,Gao Changhai,Han Xia.Application of NMR and micrometer and nanometer CT technology in research of tight reservoir:Taking Chang 7 Member in Ordos Basin as an example[J].Fault-Block Oil and Gas Field,2015,22(1):62-66.
[8]	杨兆彪,秦勇,兰凤娟.钻孔剖面多煤层物性X-CT响应及其地质意义[J].高校地质学报,2012,18(3):511-515. Yang Zhaobiao,Qin Yong,Lan Fengjuan.X-CT response and physical properties of multiple coal seams on drilling columnar section its geological implication[J].Geological Journal of China Universities,2012,18(3):511-515.
[9]	Van Geet M,Swennen R,Wevers M.Quantitative analysis of re-servoir rocks by microfocus X-ray computerised tomography[J].Sedimentary Geology,2000,132(1/2):25-36.
[10]	Wellington S L,Vinegar H J.X-ray computerized tomography[J].Journal of Petroleum Technology,1987,39(8):885-898.
[11]	Verhelst F,David P,Fermont W,et al.Correlation of 3D-computerized tomographic scans and 2D-colour image analysis of Westphalian coal by means of multivariate statistics[J].International Journal of Coal Geology,1996,29(1/3):1-21.
[12]	Simons F J,Verhelst F,Swennen R.Quantitative characterization of coal by means of microfocal X-ray computed microtomography (CMT) and color image analysis (CIA)[J].International Journal of Coal Geology,1997,34(1/2):69-88.
[13]	李清.山西延川南煤层气田2号煤层煤相研究:煤层气开发选区意义[J].石油实验地质,2014,36(2):245-248. Li Qing.Coal facies of no.2 coal in Yanchuannan coal field of Shanxi:Significance for constituencies of coalbed methane exploitation[J].Petroleum Geology & Experiment,2014,36(2):245-248.
[14]	王有智,王世辉,吴刚.呼和湖凹陷煤储层孔隙特征及其对吸附能力的影响[J].断块油气田,2014,21(4):444-448. Wang Youzhi,Wang Shihui,Wu Gang.ore characteristics of coal reservoir in Huhehu Depression and its effect on adsorption capacity[J].Fault-Block Oil and Gas Field,2014,21(4):444-448.
[15]	Karacan C O,Okandan E.Adsorption and gas transport in coal microstructure:Investigation and evaluation by quantitative X-ray CT imaging[J].Fuel,2001,80(4):509-520.
[16]	Pyrak-Nolte L J,Montemagno C D,Nolte D D.Volumetric imaging of aperture distributions in connected fracture networks[J].Geophysical Research Letters,1997,24(18):2343-2346.
[17]	Wolf K H A A,Van Bergen F,Ephraim R,et al.Determination of the cleat angle distribution of the RECOPOL coal seams,using CT-scans and image analysis on drilling cuttings and coal blocks[J].International Journal of Coal Geology,2008,73(3/4):259-272.
[18]	Gao Di,Qin Yong,Yi Tongsheng.CBM geology and exploring-developing stratagem in Guizhou Province,China[J].Procedia Earth and Planetary Science,2009,1(1):882-887.
[19]	Li Song,Tang Dazhen,Xu Hao,et al.Advanced characterization of physical properties of coals with different coal structures by nuclear magnetic resonance and X-ray computed tomography[J].Computers & Geosciences,2012,48:220-227.
[20]	Yao Yanbin,Liu Dameng,Che Yao,et al.Non-destructive chara-cterization of coal samples from China using microfocus X-ray computed tomography[J].International Journal of Coal Geology,2009,80(2):113-123.
[21]	Xu Hao,Zhang Shanghu,Leng Xue,et al.Analysis of pore system model and physical property of coal reservoir in the Qinshui Basin[J].Chinese Science Bulletin,2005,50(1):52-58.
[22]	Xu Hao,Tang Dazhen,Liu Dameng,et al.Study on coalbed methane accumulation characteristics and favorable areas in the Binchang area,southwestern Ordos Basin,China[J].International Journal of Coal Geology,2012,95:1-11.