Anisotropy estimate for the Horn River Basin from sonic logs in vertical and deviated wells
Anisotropy estimate for the Horn River Basin from sonic logs in vertical and deviated wells
复制标题
根据直井和斜井声波测井估算霍恩河流域的各向异性
DOI：
10.1190/tle34030296.1
复制
发表时间：
2015
期刊：
影响因子：
3.3
通讯作者：
B. Goodway
中科院分区：
文献类型：
--
作者：
C. Sayers;L. D. Boer;S. Dasgupta;B. Goodway
为了从地震数据中获得有关储层流体、岩性和孔隙压力的可靠信息，必须对页岩各向异性进行量化。在地震处理中，如果不考虑各向异性，可能会导致正常移动（NMO）、倾斜移动（DMO）、偏移、时间-深度转换和偏移量振幅变化（AVO）分析中的错误。krigg对密度、垂直压缩波和横波速度的估计来自于不列颠哥伦比亚省东北部合恩河资源区一个感兴趣区域的直井。将克里格预测结果与斜井轨迹上的实测测井曲线进行了比较。由于密度是标量且与井斜无关，因此密度比较可以盲测克里格精度，但同样的声波速度比较表明，声波速度总体上高于克里格垂直速度。该差异用于估计斜井位置的各向异性参数。前沿空中管制官……
Abstract Shale anisotropy must be quantified to obtain reliable information about reservoir fluids, lithology, and pore pressure from seismic data. Failure to account for anisotropy in seismic processing can lead to errors in normal moveout (NMO), dip moveout (DMO), migration, time-to-depth conversion, and amplitude variation with offset (AVO) analysis. Kriged estimates of density, vertical compressional-wave, and shear-wave velocities were derived from vertical wells in an area of interest in the Horn River resource play in northeastern British Columbia. The kriged predictions were compared with measured logs along the trajectory of a deviated well. Whereas the density comparison provided a blind test of kriging accuracy because density is scalar and independent of well deviation, the same comparison for sonic velocities revealed that they are systematically higher than the kriged vertical velocities. This difference was used to estimate anisotropy parameters at the location of the deviated well. The fac...