Seismic Stratigraphy

Question 1

What is seismic stratigraphy?

Answer 1

Strat that involves imposing acoustic signals through Earth and recording the reflected signals

Question 2

Acoustic impedance

Answer 2

Product of seismic velocity and rock density

Question 3

What needs to be taken into account when looking at seismic data?

Answer 3

Signal noise, signal attenuation, lack of acoustic contrast, and signal interference

Question 4

What is the relationship between wavelength and vertical resolution?

Answer 4

The shorter the wavelength, the greater the vertical resolution

Question 5

What is the relationship between bed thicknesses, depth and vertical resolution?

Answer 5

The deeper you go, the lower the resolution gets, so ideally when increasing in depth, the bed thicknesses need to be thicker in order to be resolved

Question 6

What is the relationship between velocity and depth and why? What happens to the wavelength?

Answer 6

The deeper you go, the acoustic velocity increases due to compaction and cementation which increases the wavelength of the signal