geo 395- mod 11 - Kingfish Oz

Question 0

acquisition for kingfish

Answer 0

single fold

analog ( continual recording)

Question 1

what is inversion or basin inversion ?

Answer 1

relative uplift of a sedimentary basin as a result of crustal shortening

Question 2

what is analog data acquisition ?

Answer 2

continual recording

Question 3

what is digital data acquisition ?

Answer 3

dicrete samples

Question 4

internal velocities -Kingfish 1 well

Answer 4

x axis - internal velocity. y axis is depth. Each step represents a layer. The length of the interval is the thickness of the layer. At the base of the channel where it suddenly goes in the opposite direction, that is velocity inversion . There is a decrease in velocity due to presence of HC. The trend for the initial curve is Vrms

Question 5

velocity interpretation

Answer 5

• underlying and surrounding velocities are less

- distortion of the underlying time structure.

Question 6

time structure contour map

Answer 6

thickness of the channel is 0.2 sec or 1200ft

time structure is severely distorted by velocity effects of the channel

Question 7

relationship between time and depth

Answer 7

apparent structures on Latrobe are velocity induced. Kingfish are distorted by velocity gradients

Question 8

prospect evaluation - what is involved?

Answer 8

accurate mapping of average velocities . Determine velocity by indirect method of CDP seismic data

Question 9

Velocity analysis - a how to …

Answer 9

• apply NMO to a CDP gather then measure the correlation between the traces.
• NMO velocities need calibration to be used in conversion of seismic reflection time.

Question 10

Seismic Ray tracing

Answer 10

• Ray tracing of CDP gathers andshow transverses of different thickness of the high velocity material
• Latrobe surface is flat in depth
• There is an apparent structure in depth as a result of NMP velocities for depth conversion

Question 11

average velocity errors

Answer 11

due to wrong average velocities