新疆石油地质

›› 2018, Vol. 39 ›› Issue (2): 1-1.doi: 10.7657/XJPG20180218

• 论文 •    

应用微CT技术研究砂砾岩孔隙结构特征——以玛湖凹陷百口泉组储集层为例

熊健1，唐勇2，刘向君1，瞿建华2，刘凯1，尤新才2   

  1. (1.西南石油大学 油气藏地质及开发工程国家重点实验室,成都 610500;2.中国石油 新疆油田分公司 勘探开发研究院,新疆 克拉玛依 834000)
  • 出版日期:2019-01-01 发布日期:1905-07-15

Using Micro-CT Scanning Technology to Study Characteristics of Pore Structures in Sandy Conglomerate: A Case from Baikouquan Formation in Mahu Sag, Junggar Basin

XIONG Jian1, TANG Yong2, LIU Xiangjun1, QU Jianhua2, LIU Kai1, YOU Xincai2   

  1. (1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China; 2. Research Institute of Exploration and Development, Xinjiang Oilfield Company, Petrochina, Karamay, Xinjiang 834000, China)
  • Online:2019-01-01 Published:1905-07-15

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摘要： 以玛湖凹陷百口泉组砂砾岩储集层为研究对象，利用微CT技术，研究了砂砾岩储集层岩石的二维孔隙结构和三维孔隙结构特征。研究结果表明：玛湖凹陷百口泉组砂砾岩样品以残余粒间孔、溶蚀孔和微裂缝为主；孔隙形状不规则、孔喉大小不一，孔喉分布状态主要为连片状和孤立状；孔隙分布具有微观非均质性，在物性较差的样品中表现更明显；等效孔隙半径分布主要呈单峰分布，且等效孔隙半径主要小于50 μm，物性差的样品中小孔所占比例高于物性好的样品。

Abstract: Taking the sandy conglomerate reservoir of Baikouquan formation in Mahu sag as the study objects, micro-CT scanning technology is used to investigate the characteristics of the 2D and 3D pore structures of the rock in the sandy conglomerate reservoir. The results indicated that the sandy conglomerate sample obtained from Baikouquan formation in Mahu sag is dominated by residual intergranular pores, dissolved pores and micro-cracks. The shapes of the pores are irregular, the pore throats are of different sizes and their distributions are mainly contiguous and isolated; microscopic heterogeneous pore distribution is noted and even obvious in the samples with poor physical properties; equivalent pore radius is mainly in unimodal distribution and mostly less than 50 μm, and the proportion of small pores in the samples with relatively poor physical properties is higher than that in the samples with good physical properties

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