吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (1): 307-317.doi: 10.13278/j.cnki.jjuese.20160305

• 地球探测与信息技术 • 上一篇    下一篇

基于CT的数字岩心三维建模

林承焰1,2, 王杨1,2, 杨山3, 任丽华1,2, 由春梅4, 吴松涛5, 吴玉其1,2, 张依旻1,2   

  1. 1. 中国石油大学(华东)地球科学与技术学院, 山东 青岛 266580;
    2. 山东省油藏地质重点实验室, 山东 青岛 266580;
    3. 中国石油西南油气田分公司勘探开发研究院, 成都 610051;
    4. 大庆油田有限责任公司勘探开发研究院, 黑龙江 大庆 163000;
    5. 中石油勘探开发研究院, 北京 100083
  • 收稿日期:2016-10-20 出版日期:2018-01-26 发布日期:2018-01-26
  • 作者简介:林承焰(1963-),男,教授,博士生导师,主要从事储层地质学与油藏描述的教学与科研工作,E-mail:lincy@upc.edu.cn
  • 基金资助:
    “十三五”国家科技重大专项（2016ZX05054012）

3D Modeling of Digital Core Based on X-ray Computed Tomography

Lin Chengyan1,2, Wang Yang1,2, Yang Shan3, Ren Lihua1,2, You Chunmei4, Wu Songtao5, Wu Yuqi1,2, Zhang Yimin1,2   

  1. 1. School of Geosciences, China University of Petroleum(East China), Qingdao 266580, Shandong, China;
    2. Reservoir Geology Key Laboratory of Shandong Province, Qingdao 266580, Shandong, China;
    3. Exploration and Development Research Institute of Southwest Oil & Gas Field Company, PetroChina, Chengdu 610051, China;
    4. Research Institute of Exploration and Development of Daqing Oilfield Company Ltd, Daqing 163000, Heilongjiang, China;
    5. Research Institute of Petroleum Exploration and Development, Beijing 100083, China
  • Received:2016-10-20 Online:2018-01-26 Published:2018-01-26
  • Supported by:
    Supported by National Science and Technology Major Project(2016ZX05054012)

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摘要： 为研究储层微观孔隙结构和建立微观渗流模型，本文通过对东营凹陷沙三中亚段H152井区的典型低渗透储层岩样进行CT（computed tomography）扫描及图像处理，建立了微观尺度的数字岩心模型；继而经过对该模型进行分析和计算，提取了储层孔喉网络模型，在三维空间上直观、清晰地显示了不同尺度的孔隙及喉道的形态、大小和分布；最后通过对孔隙结构特征、孔隙度、渗透率和压降等动静态参数的分析和计算，建立了储层岩样的微观渗流模型。根据算法对比和参数分析结果认为：与传统中值滤波相比，非局部均值滤波算法可在相似性比较的基础上进行滤波处理，从而提高模型的准确性；基于CT的数字岩心建模可为地质研究提供可靠的数字模型；根据近似等压面假设的微观渗流数值模拟分析了流体渗流特征，为揭示低渗透储层流体渗流规律提供了一种新的途径。

关键词: 数字岩心, 孔隙结构, 孔喉网络模型, 建模, 微观渗流, CT, 东营凹陷

Abstract: In order to study the micropore structure of petroleum reservoir and develop 3D micro percolation model, CT(computed tomography)scanning and image processing of typical low- permeability reservoirs were carried out in the H152 area of the middle section of Shahejie Formation in Dongying depression, and a micro digital core model was established. Then, through the analysis and calculation of the model, the reservoir pore throat network model attributions of different scales of pores and throats were displayed intuitively and clearly in three-dimensional space. Based on the analysis and calculation of dynamic and static parameters such as pore structure, porosity, permeability and pressure drop, a micro percolation model of reservoir samples was established. According to the comparison of algorithm and analysis of the parameters, it is concluded that:Compared with the traditional median filter, the non-local-means filter algorithm that based on the comparison of similarity and the accuracy of the model is improved; The CT-based digital core can provide a reliable digital model for geological research; Based on the assumption of isobaric surface, the numerical simulation of percolation was carried out, and the characteristics of fluid transport were analyzed. The numerical simulation of percolation provides a new way to reveal the transport law of low permeability reservoir.

Key words: digital core, pore structure, pore-network model, modeling, micro percolation, computed tomography, Dongying depression

中图分类号: 

  • TE122.2
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