新疆石油地质

新疆石油地质 ›› 2025, Vol. 46 ›› Issue (6): 790-799.doi: 10.7657/XJPG20250615

• 应用技术 • 上一篇    

基于黏土矿物含量的页岩油水平井声波各向异性校正方法及应用

李杨虎1(), 王振林1,2(), 邵欢欢1, 陈山河1, 汤富康1, 刘财广1, 王伟1, 张浩1   

  1. 1.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
    2.中国石油大学（北京） 石油工程学院，北京 102249
  • 收稿日期:2025-04-30 修回日期:2025-08-11 出版日期:2025-12-01 发布日期:2025-12-05
  • 通讯作者: 王振林 E-mail:86488299@petrochina.com.cn;wzhenl@petrochina.com.cn
  • 作者简介:李杨虎（1993-），男，云南曲靖人，工程师，博士，测井综合解释，（Tel）15763905008（Email）86488299@petrochina.com.cn
  • 基金资助:
    新疆维吾尔自治区“天池英才”计划项目(25XJYTSQ038);中国石油科技项目(2023ZZ15YJ02);新疆维吾尔自治区“天山英才”计划项目(2022TSYCJC0027)

Acoustic Anisotropy Correction Based on Clay Mineral Content in Shale Oil Horizontal Wells

LI Yanghu1(), WANG Zhenlin1,2(), SHAO Huanhuan1, CHEN Shanhe1, TANG Fukang1, LIU Caiguang1, WANG Wei1, ZHANG Hao1   

  1. 1. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China
    2. School of Petroleum Engineering, China University of Petroleum (Beijing), Beijing 102249, China
  • Received:2025-04-30 Revised:2025-08-11 Online:2025-12-01 Published:2025-12-05
  • Contact: WANG Zhenlin E-mail:86488299@petrochina.com.cn;wzhenl@petrochina.com.cn

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摘要：

页岩油储集层多采用水平井开发模式，由于储集层薄互层构造发育、各向异性显著，水平井中测量的声波时差与直井测量值存在较大差异，严重影响了水平井解释精度。应用四分量旋转技术处理偶极阵列声波数据进行横波各向异性校正，针对该方法中慢横波时差由于频散严重而难以准确提取的问题，通过分析不同盆地典型页岩油储集层水平井测井资料，建立横波各向异性比与黏土矿物含量的函数关系，进一步利用多盆地典型页岩油储集层岩心实验数据建立纵波和横波各向异性比之间的转换关系。基于黏土矿物含量得到纵波和横波各向异性比，结合从声波测井资料中提取的快纵波和快横波时差，实现对水平井中声波各向异性的校正。利用校正方法对不同盆地的水平井测量结果进行处理，校正后声波时差与邻近直井测量值吻合较好，并且基于校正后声波时差计算的声波孔隙度与密度孔隙度基本一致，表明校正方法具有良好的应用效果，校正后的声波时差可用于页岩油储集层、工程评价等参数的计算。

关键词: 页岩油, 水平井, 声波各向异性校正, 黏土矿物含量, 纵波, 横波

Abstract:

Horizontal wells are widely used in the development of shale oil reservoirs. Due to the presence of thin interlayers in and significant anisotropy of the reservoir, there is an obvious difference between the acoustic slowness measured in horizontal wells and that measured in vertical wells, which seriously affects the interpretation accuracy of horizontal wells. In this paper, the four-component rotation technique is applied to process dipole array acoustic data for correcting shear-wave anisotropy. The slow shear-wave slowness obtained by this method is difficult to be accurately extracted due to serious dispersion effect. To solve this problem, a functional relationship between shear-wave anisotropy ratio and clay mineral content is established through analyzing horizontal well logging data of typical shale oil reservoirs in different basins, and a transformation relationship between the anisotropy ratios of compressional wave and shear wave is defined by using the core experimental data of these reservoirs. In practical processing, the anisotropy ratios of compressional- and shear-waves are obtained based on the clay mineral content. By combining the fast compressional-wave and shear-wave slowness values extracted from the acoustic logging data, the measured acoustic anisotropy of horizontal well is corrected. This correction method has been used to the actual horizontal well measurements in different basins, suggesting that the corrected acoustic slowness well agrees with the measured value of adjacent vertical well. The porosity calculated by the corrected acoustic slowness is basically consistent with the porosity calculated from the density logging. The results indicate that the proposed correction method is effective, and the corrected acoustic slowness can be used for calculating reservoir and engineering evaluation parameters for shale oil.

Key words: shale oil, horizontal well, acoustic anisotropy correction, clay mineral content, compressional wave, shear wave

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