[1]尤源a,牛小兵a,李廷艳a,等.CT技术在致密砂岩微观孔隙结构研究中的应用——以鄂尔多斯盆地延长组长7段为例[J].新疆石油地质,2016,(02):227.[doi:10.7657/XJPG20160219]
 YOU Yuana,NIU Xiaobinga,LI Tingyana,et al.Application of CT Scanning System to Study of MicroPore Structure of Tight Sandstone: A Case Study of Chang7 Member of Yanchang Formation in Ordos Basin[J].Xinjiang Petroleum Geology,2016,(02):227.[doi:10.7657/XJPG20160219]
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CT技术在致密砂岩微观孔隙结构研究中的应用——以鄂尔多斯盆地延长组长7段为例()
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《新疆石油地质》[ISSN:1001-3873/CN:65-1107/TE]

卷:
期数:
2016年02期
页码:
227
栏目:
出版日期:
2016-04-01

文章信息/Info

Title:
Application of CT Scanning System to Study of MicroPore Structure of Tight Sandstone: A Case Study of Chang7 Member of Yanchang Formation in Ordos Basin
文章编号:
1001-3873(2016)02-0227-04
作者:
尤源12a牛小兵12a李廷艳12a杨孝2b淡卫东12a
(1.低渗透油气田勘探开发国家工程实验室,西安 710018;2.中国石油 长庆油田分公司 a.勘探开发研究院;b.油藏评价处,西安 710018)
Author(s):
YOU Yuan12a NIU Xiaobing12a LI Tingyan12a YANG Xiao2b DAN Weidong12a
(1.National Engineering Laboratory for Exploration and Development of LowPermeability Oil & Gas Fields, Xian, Shaanxi 710018, China;2.PetroChina Changqing Oilfield Company, a.Research Institute of Exploration and Development,b.Department of Reservoir Evaluation, Xian, Shaanxi 710018, China)
关键词:
鄂尔多斯盆地延长组致密砂岩孔隙喉道CT技术
Keywords:
Ordos basin Yanchang formation tight sandstone pore throat CT scanning system
分类号:
TE112.3
DOI:
10.7657/XJPG20160219
文献标志码:
A
摘要:
为揭示致密砂岩复杂的孔隙结构特征,应用高分辨率CT技术,对鄂尔多斯盆地延长组长7段致密砂岩样品开展了定量研究。利用CT阈值差异识别样品中的孔隙和喉道,从而获得致密砂岩高精度二维及三维孔喉图像;应用数字岩心方法建立致密砂岩孔隙网络模型,并根据模型中的定量参数分析,获得孔隙及喉道的半径分布及其对储集空间的贡献率、孔喉连通性等特征,实现了长7段致密砂岩微观孔隙结构特征定量表征:长7段致密砂岩微米级孔喉连续分布;半径大于2 μm 的孔隙是长7段致密砂岩的主要储集空间;孔隙、喉道间具有一定的连通性,配位数主要为1~3. 应用高分辨率CT技术可定量表征致密砂岩孔隙结构特征。
Abstract:
In order to reveal the complicated pore structure characterisitcs of tight sandstone, this paper made a quantitative study of the tight sandstone sample from the Chang?7 member of Yanchang formation in Ordos basin by high?resolution CT scanning system, obtained the high?accuracy 2D and 3D pore throad images of it by using CT threshold differences, developed the tigh sandstone pore network model using digital core method, and conducted quantitative parameter statistics and analysis from this model, obtaining the radius distribution of pores and throats and their contributions and pore throat connectivity characterisitcs to the tight sandstone storage spaces, hence realizing the quantitative characterization of micro?pore structures of the tight sandstone. The results show that the tight sandstone of Chang?7 member of Yanchang formation in Ordos basin is characterized by continued distribution of micron pore throats, different contributions of different radius pores to the storage spaces, of which the pores with radius over 2 μm are the main storage spaces of it, and a certain connectivity between pores and throats, with coordination number from 1 to 3

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更新日期/Last Update: 2016-03-24