acoustic logging的意思|示意

Acoustic logging, also known as sonic logging, is the process of measuring the properties of a rock formation by passing a mechanical wave through it and recording the wave's properties on the other side. Acoustic logging is used to measure the compressional wave speed (or acoustic velocity) of rocks and other geological materials, which can be used to determine the composition and density of the rocks. It is commonly used in oil and gas exploration and production, as well as in civil engineering for foundation and seismic engineering studies.

Acoustic logging is typically done using a wireline logging tool, which is lowered into the borehole to measure the properties of the subsurface rocks. The tool is usually fitted with one or two receivers, which detect the mechanical wave as it passes through the rock formation. The sound wave is then analyzed to determine the compressional wave speed of the rock.

The compressional wave speed can be used to infer the type and density of the rock in the formation, as well as its porosity and permeability. It can also be used to estimate the depth of casing or fractures in the formation, which is useful in oil and gas exploration and production. In addition, it can be used to assess seismic hazards, as the wave speed can be used as an indicator of rock stability.

In addition to compression wave speed, acoustic logging can also be used to measure shear wave speed, which can provide additional information about the composition and structure of the subsurface rocks. It can also be used to measure borehole temperature and pressure, which is useful in civil engineering applications.

Overall, acoustic logging is a useful tool that can be used to measure the properties of rock formations and assess how these properties will affect subsurface applications such as oil and gas exploration, seismic engineering, and civil engineering.