Petroleum topic - Sonic procurement Circuit Profile
In geological exploration and development of mineral resources is an important aspect of well logging technology, which not only reduces the workload of geological exploration, but also improves the speed reduced costs.
Because the continuous development of modern society and economy, oil and other mineral resources increased market demand, so for technical performance logging tools more stringent demand is greater, in the field of geological prospecting acoustic logging tool applications are becoming increasingly widely.
The speed of sound and sound amplitude acoustic logging logging is the most common waveform information it obtains.
For example: transverse wave, longitudinal wave, by processing digital signals, according to the principle of the sonic log is obtained, the waveform information, not only conducive to geological exploration of mineral resources and applications, and the elastic characteristics of the formation, fracture, and the fracture permeability pressure, ore body identification can expand deeper study, but also enable logging tools can be better applied, more comprehensive services in geological prospecting.
The basic principles of acoustic logging
1 sonic almost exist in our daily life bit by bit, the sound wave is a form of physical movement, is spread through the media that can be perceived by the organs of hearing fluctuation, we use some ears It can be heard, and some need the help of acoustic instruments in order to collect acoustic signals. The kind of acoustic wave propagation velocity and temperature of the medium is also related, in sonic logging is the propagation of different rocks with acoustic waves, acoustic characteristic velocity, amplitude and frequency of changes to different geological section for drilling, cementing quality determination of a logging kinds of ways.
2, acoustic logging instrument refers to the use of the downhole formation acoustic velocity An acoustic wave device to geological exploration. After decades of technical development and improvement, especially in recent years, since the promotion of information technology and digital integrated circuits, digital, intelligent, automated these changes are also on the progressive realization of acoustic logging tool, mechanism design is also more complete. Dipole array acoustic logging, logging ultrasound imaging are commonly used to acoustic logging tool logging stage. Mainly rely on complete geologic logging is the logging tool of longitudinal and shear waves in the formation the information medium generated by collecting data by analyzing the reflected sound wave velocity and the angle of incidence and refraction. In fact, it is a time measuring system, acoustic logging tool in the propagation velocity through the formation, formation porosity is calculated.
