Well-Log Data with Seismic

Question 1

Well Logs have ____ vertical Resolution and ___ lateral resolution

Answer 1

High vertical Res – cm

Poor lateral res – 100 to 1000m

Question 2

Seismic Data has ____ vert res and ____ lateral resolution

Answer 2

Poor vert res – 30 to 100 m

Good lat res – 10m

Question 3

what is the purpose of well log interpolation?

Answer 3

attempt to fill information between logs

Question 4

When correlating well data with seismic, you take well log to a _____ _______

Answer 4

synthetic seismogram

Question 5

What are the three things that make up the basis of Seismic Interpretation?

Answer 5

well log to synthetic seismogram
correlation with seismic data
identify formation on seismic sections

Question 6

Synthetic Seismogram can be summed up with what two processes?

Answer 6

convolve wavelet with reflectivity

approximate seismic data

Question 7

Correlation of synthetic seismogram allows what two things?

Answer 7

correlate synthetic with real data

Identify the formations

Question 8

Take a look slides 25-28

Answer 8

L6

Question 9

what is placed on the surface to detect microseisms?

Answer 9

Receivers

Question 10

where else can receivers be placed?

Answer 10

in the well

Question 11

why are gravity and magnetics used during potential field exploration?

Answer 11

high resolution provides additional info – clear up ambiguity and adds confidence and provides information on Gross Features

Question 12

Is earths magnetic field static?

Answer 12

No

Question 13

what causes earths magnetic field?

Answer 13

by the geodynamo
rotation of solid inner core relative to outer core and convection in the liquid outer core

driven by heterogeneities in the mantle

Question 14

which way does a compass point?

Answer 14

Magnetic North and it is currently at 14.42 degress to the east

Question 15

how often do the magnetic poles flip? how long does it take

Answer 15

every 800-900MM yrs

1000yrs

Question 16

magnetic declination curves
West - or +
East - or +

Answer 16

East + (Add)
West - (remove)
(Calgary MNP points 14.5 to the East)

Question 17

micro seismic imaging allows you to do two things regarding when an event happens, what are they?

Answer 17

Detect when it happens and identify the location of the event

Question 18

micro seismic allows for fault detection. true or false?

Answer 18

True

Question 19

how does it detect these faults?

Answer 19

seepage along the faults

Detect Iron in the fault plane (magnetic effect detectable)

Question 20

is Australia a magnetic anomaly?

Answer 20

Yes

Question 21

what is the earths radius at the poles?

Answer 21

6357km

Question 22

What is the earths radius at the Equator?

Answer 22

6378km

Question 23

whats the difference in the radius of the poles vs equator?

Answer 23

21.3648484610118919636478486151846548km

Question 24

is gravity higher at the poles or the equator?

Answer 24

at the poles – 9.832

at the equator – 9.780

Question 25

is it the rotation or the shape of the earth that creates the difference in acceleration at the poles ?

Answer 25

the shape

Question 26

true or false?

rotation of the earth decreases measured accel at the Poles

Answer 26

false

Question 27

True or false?

Rotation of the earth increases the acceleration?

Answer 27

False. Rotation does not affect the acceleration

Question 28

what is the bourguer correction?

Answer 28

gboug = 2(Pi)G(row)h

Question 29

True or false?rugged terrain tends to reduce the gravity field at the surface of the earth.

Answer 29

True.

Question 30

true or false.

tides affect the shape of the earth AND the a temporary affect on the observed gravity

Answer 30

True

Question 31

true or false.

The affect is trivial

Answer 31

False