石油学报 ›› 2015, Vol. 36 ›› Issue (1): 74-80.DOI: 10.7623/syxb201501009

• 油田开发 • 上一篇    下一篇

致密气储层可压裂性测井评价方法

孙建孟1, 韩志磊1, 秦瑞宝2, 张晋言3   

  1. 1. 中国石油大学地球科学与技术学院 山东 青岛 266580;
    2. 中海油研究总院 北京 100027;
    3. 中国石油化工股份有限公司胜利石油工程有限公司测井公司 山东 东营 257096
  • 收稿日期:2014-07-12 修回日期:2014-10-30 出版日期:2015-01-25 发布日期:2014-12-09
  • 通讯作者: 孙建孟, 男, 1964年10月生, 1984年获华东石油学院学士学位, 1999年获石油大学(华东)应用地球物理专业博士学位, 现为中国石油大学(华东)教授、博士生导师, 主要从事测井数据处理与解释的教学和研究工作.Email:sunjm@upc.edu.cn
  • 作者简介:孙建孟, 男, 1964年10月生, 1984年获华东石油学院学士学位, 1999年获石油大学(华东)应用地球物理专业博士学位, 现为中国石油大学(华东)教授、博士生导师, 主要从事测井数据处理与解释的教学和研究工作.Email:sunjm@upc.edu.cn
  • 基金资助:

    国家自然科学基金项目(No.41374124)和国家重大科技专项(2011ZX05006-002)资助.

Log evaluation method of fracturing performance in tight gas reservoir

Sun Jianmeng1, Han Zhilei1, Qin Ruibao2, Zhang Jinyan3   

  1. 1. School of Geosciences, China University of Petroleum, Shandong Qingdao 266580, China;
    2. CNOOC Research Institute, Beijing 100027, China;
    3. Logging Company, Sinopec Shengli Petroleum Engineering Limited, Shandong Dongying 257096, China
  • Received:2014-07-12 Revised:2014-10-30 Online:2015-01-25 Published:2014-12-09

摘要:

从致密砂岩脆性指数和断裂韧性2个方面对致密气储层可压裂性测井评价方法进行了研究.总结并对比分析了室内实验测定和利用测井数据计算致密气储层脆性指数的方法,建立了研究区适用性较好的脆性指数预测模型;为克服单纯依赖脆性指数进行可压裂性评价时的不足,应用线弹性断裂理论构建脆性指数和断裂韧性相结合的可压裂性指数.指示了筛选优良可压裂层段的标准:较高的脆性指数和较强的水力压裂造缝能力.从而,具有较高可压裂性指数的地层被认为是可压裂层段,具有较低可压裂性指数的地层被认为是压裂遮挡层.以鄂尔多斯盆地致密砂岩地层S井为例进行致密气储层可压裂性指数建模,形成基于可压裂性指数模型的可压裂性测井评价技术流程.

关键词: 致密气储层, 可压裂性评价, 脆性指数, 断裂韧性, 可压裂性指数

Abstract:

The logging evaluation methods for fracturing performance in tight gas reservoirs were studied from two aspects, i.e., brittleness index and fracture toughness of the tight sandstone. Summarization and comparative analysis were made on the experimental determination method and the method for calculating brittleness index of the tight gas reservoir based on logging data. Then a brittleness index prediction model with favorable applicability was established in this study. To avoid the shortage due to the single use of brittleness index for fracturing evaluation, linear elastic fracture theory was adopted to create the fracturing performance index through combination of brittleness index and fracture toughness, indicating the criterion of screening favorable fracturing strata, i.e., higher brittleness index and stronger hydraulic fracturing ability. Therefore, those with higher and lower fracturing performance index can be considered as fracturing strata and fracturing barriers respectively. Taking Well S in tight sandstone strata of the Ordos Basin as a case, a model for fracturing performance index of the tight gas reservoir was built, thus forming the flows of fracturing logging evaluation technology.

Key words: tight gas reservoir, fracturing performance evaluation, brittleness index, fracture toughness, fracturing performance index

中图分类号: