Learn Seismic Data Acquisition

Define the seismic wave form and wavelet, describe how source transmission, subsurface conditions, and receivers shape recorded seismic pulse, and identify seismic wavelength, amplitude, frequency, phase, and the wavefront concept.

Explore seismic waves, including body waves (p wave and shear wave) and surface waves (Rayleigh and low waves). Apply Wiggins principle to explain refraction, reflection, and diffraction.

Define seismic resolution and limits, distinguishing vertical and lateral resolution from detectability, with vertical resolution about one quarter of the wavelength and lateral about one wavelength.

digitisation and time-space sampling convert analog seismic data to digital, boosting dynamic range and reducing distortion, enabling multiplexed recording and fast processing to produce interpretable 3d seismic data.

Explore seismic data and elasticity by defining stress and strain, and examine elastic wave propagation in a uniform model space with P and S waves, velocities, and Snell's law.

Explore how sampling rate influences seismic data and causes aliasing, using examples at four, two, and one millisecond rates, Nyquist limits, and anti-aliasing filters.

Relate porosity, permeability, density, and velocity to acoustic impedance and seismic reflection coefficients in sedimentary rocks. Show how velocity estimates density and how impedance governs reflections.

Explore seismic data acquisition through array design, ensuring uniform source and receiver distributions to form wave-number filters, and match inline and cross-line responses in 2D and 3D surveys.

Digitize seismic data by time and space sampling, converting analog recordings to digital and multiplexing thousands of channels. Digital processing increases dynamic range and reduces distortion.

Analyze seismic noise and wave types, including body waves and surface waves like the riley and love waves, and examine reflection coefficients, impedance contrasts, ghosts, and multiples in records.

Plan and execute 2D seismic data acquisition by selecting sources such as dynamite, ammonium nitrate, air gun, or hydraulic vibrator, deploying land or marine receivers, and designing the survey network.

Explore seismic data acquisition problems, including sub-area vibrator issues, mud challenges, and sand dune or shallow water conditions, with safety risks like a tank farm to avoid.

Explore onshore seismic data acquisition, covering land geometries, folding, and noise analysis to optimize signal-to-noise ratios. Learn how static corrections and array design mitigate weathering effects and improve data interpretation.

Learn offshore seismic data acquisition using marine surveys with air source Ergon, hydrophones as receivers, and a pulled streamer system maintaining depth, coverage, and common midpoint lines.

Ocean bottom cable acquisition places geophones and hydrophones on the seafloor to record seismic data with surface vessels and air guns, improving signal-to-noise ratio for deeper, full azimuth imaging.

Learn how 3D seismic data acquisition improves imaging over 2D, via 3D migration and CDP stacks, with line geometry, sampling, and careful planning of 3D design stages.