What is PS logging?
The P-S Logging or suspension survey is a low-frequency acoustic probe which can measure compression and rotational wave velocity using indirect excitation. Allows high resolution P & S wave measurement at depths of up to 1000 m.
What is ps suspension Logging?
Suspension P-S velocity logging (also known as suspension logging) is a method for determining shear (VS) and compressional (VP) wave velocity profiles as a function of depth, in addition to supplementing stratigraphic information obtained in soil and rock formations.
What is downhole seismic testing?
Downhole seismic test is an in-situ test and determine the velocity of primary (P) and secondary (S) seismic waves to provide the elastic soil parameters. The P and S waves velocities are used in geotechnical foundation analysis, static and dynamic soil analysis, liquefaction assessment and etc.
What is MASW Geophysics?
Multichannel Analysis of Surface Waves (MASW) is a geophysical method that uses surface wave (Rayleigh wave) propagation to profile the subsurface. Surveys can be designed to provide high resolution near surface results, or to profile up to 60 meters depth.
What is seismic uphole?
INTRODUCTION. The up-hole method of seismic refraction survey is a field seismic technique which uses receivers on the ground surface and an underground source to derive information about the subsurface lithology. The up-hole survey method uses small explosives or a mechanical source (energy source).
What is MASW testing?
MASW is a seismic method that measures the shear-wave velocity distribution, thereby can be used to measure the arrangement of overburden and bedrock. It analyzes the dispersion of surface waves (usually the fundamental-mode Rayleigh waves).
What is multichannel analysis of surface waves MASW?
The Multi-channel Analysis of Surface Waves (MASW) is a seismic method used to evaluate the shear-wave velocities of subsurface materials through the analysis of the dispersion properties of Rayleigh surface waves (“ground roll”). The data are collected on the surface without the need of borehole.
What does uphole mean?
upholenoun. An oilfield term referring to the relative position of a measurement or equipment within the wellbore, towards the top of the hole. Etymology: up- + hole.
What is the motion of surface waves?
Surface waves travel only through solid media. They are slower-moving than body waves but are much larger and therefore more destructive. The two types of surface waves are named Love waves and Rayleigh waves, after the scientists who identified them.
What does MASW measure?
How do you do MASW?
The entire procedure for MASW usually con- sists of three steps: (1) acquiring multichannel field records (or shot gathers); (2) extracting dis- persion curves (one from each record); and (3) inverting these dispersion curves to obtain 1D (depth) VS profiles (one profile from one curve).
What does upholding c life mean?
transitive verb. 1a : to give support to. b : to support against an opponent. 2a : to keep elevated.