• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Pure and Applied Geophysics >Measurements of Seismic Anisotropy in Synthetic Rocks with Controlled Crack Geometry and Different Crack Densities
【24h】

Measurements of Seismic Anisotropy in Synthetic Rocks with Controlled Crack Geometry and Different Crack Densities

机译：控制裂纹几何和不同裂纹密度合成岩石地震各向异性的测量

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Seismic anisotropy can help to extract azimuthal information for predicting crack alignment, but the accurate evaluation of cracked reservoir requires knowledge of degree of crack development, which is achieved through determining the crack density from seismic or VSP data. In this research we study the dependence of seismic anisotropy on crack density, using synthetic rocks with controlled crack geometries. A set of four synthetic rocks containing different crack densities is used in laboratory measurements. The crack thickness is 0.06 mm and the crack diameter is 3 mm in all the cracked rocks, while the crack densities are 0.00, 0.0243, 0.0486, and 0.0729. P and S wave velocities are measured by an ultrasonic investigation system at 0.5 MHz while the rocks are saturated with water. The measurements show the impact of crack density on the P and S wave velocities. Our results are compared to the theoretical prediction of Chapman (J App Geophys 54:191-202, 2003) and Hudson (Geophys J R Astron Soc 64:133-150, 1981). The comparison shows that measured velocities and theoretical results are in good quantitative agreement in all three cracked rocks, although Chapman's model fits the experimental results better. The measured anisotropy of the P and S wave in the four synthetic rocks shows that seismic anisotropy is directly proportional to increasing crack density, as predicted by several theoretical models. The laboratory measurements indicate that it would be effective to use seismic anisotropy to determine the crack density and estimate the intensity of crack density in seismology and seismic exploration.
机译：地震各向异性有助于提取用于预测裂缝对准的方位形信息，但是裂纹储层的准确评估需要了解裂缝发育程度，这是通过确定来自地震或VSP数据的裂缝密度来实现的。在本研究中，我们使用具有受控裂纹几何形状的合成岩石研究地震各向异性对裂缝密度的依赖性。在实验室测量中使用一组包含不同裂缝密度的四个合成岩石。裂缝厚度为0.06mm，裂缝直径在所有裂缝岩石中为3mm，而裂缝密度为0.00,0.0243,0.0486和0.0729。通过超声波调查系统在0.5MHz下测量P和S波速度，而岩石用水饱和。测量显示裂缝密度对P和S波速度的影响。我们的结果与Chapman的理论预测进行了比较（J App Geophys 54：191-202,2003）和哈德逊（Geophys J R Astron SoC 64：133-150,1981）。比较表明，测量的速度和理论结果在所有三个破裂的岩石中处于良好的定量协议，尽管Chapman的模型更好地拟合实验结果。四种合成岩石中P和S波的测量各向异性表明，地震各向异性与近似理论模型预测的增加的裂缝密度直接成比例。实验室测量表明，使用地震各向异性来确定裂缝密度并估计地震学和地震勘探中裂缝密度强度是有效的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号