UC知道石油地址专业英语
来源：百度知道 编辑：UC知道 时间：2024/06/21 00:12:43
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Seismic data represent the most important source of information about underground formations that have not been accessed by excavations or drilling. When target formations can be reached by drilling, more accurate velocity data are available via logging. The primary use of the seismic information is still to map structure. However, there is a growing interest in using seismic data to derive intrinsic information about rock properties such as porosity, clay content, etc. Porosity estimation has traditionally also been the main application of sonic logs. In fact, an established school of thought holds that velocities in sedimentary rocks are primarily a measure of porosity-the lower the velocity, the higher the porosity.
In this context, it is important to notice that velocities may be strongly dependent on the stress state as well as the stress history of the rock. This is of particular importance when we wish to compare velocities measured under different stress co
Seismic data represent the most important source of information about underground formations that have not been accessed by excavations or drilling. When target formations can be reached by drilling, more accurate velocity data are available via logging. The primary use of the seismic information is still to map structure. However, there is a growing interest in using seismic data to derive intrinsic information about rock properties such as porosity, clay content, etc. Porosity estimation has traditionally also been the main application of sonic logs. In fact, an established school of thought holds that velocities in sedimentary rocks are primarily a measure of porosity-the lower the velocity, the higher the porosity.
In this context, it is important to notice that velocities may be strongly dependent on the stress state as well as the stress history of the rock. This is of particular importance when we wish to compare velocities measured under different stress co
地震数据所代表的最重要的信息来源，对地下岩层有没有被浏览所发掘或钻探。当编队目标可以达成的钻井，更准确的速度数据可通过伐木。主要利用地震资料仍然以地图的结构。不过，有越来越多的兴趣，利用地震数据计算出的内在信息，岩石特性，如孔隙度，泥质含量等，孔隙度估算，历来也一直是主要的应用声波测井数据。事实上，在一个既定的学校的思想认为，在速度沉积岩，主要是衡量孔隙度-低的速度，较高的孔隙率。
在这一背景下，重要的是要看到，速度可能会强烈地依赖于应力状态以及应力史的岩石。这是特别重要的，当我们想以速度来衡量，根据不同的应力条件-原位讲，近井筒讲，没有讲，在所有与我们往往忽略或无法交代的影响，应力史的岩石。一个例子的潜在影响的应力史是如图1所示。如图所示的P波速度与孔隙度（衡量根据相同的条件） ，为一组样品具有相同的岩性特征除应力历史。正常趋势，随着递减速度增加，孔隙度，是反转，显示受到强烈冲击的应力历史。这些成果将在解释条款细观过程后，在这个文件中。
从理论上说，一个完善的速度v在物质是由一名刚度C与密度D ，因为既然密度可以通过其他途径，把速度可以被视为一个衡量的僵硬。经验表明，经常存在着显着的区别， "动态"的刚度得到了从速度测量和相应的刚度得到了静态测量。这种差异取决于双方对岩石类型和应力状态。