c2b_default

B PET1

Petrophysics

Petrophysics

21
0.0 (0)
S. L.
Lernen
S. L.
This flashcard set is designed for primary school students exploring nature studies, particularly focusing on geological concepts. It covers key topics like neutron and density logs, various rock types such as limestone, sandstone, and shale, and their properties. The flashcards also delve into nuclear magnetic resonance (NMR) techniques, explaining how they work and their applications in studying fluid properties and porosity. This set is beneficial for young learners who are beginning to understand the fundamentals of geology and related scientific principles.
Karten
21
Lernende
1
Sprache
Englisch
Kategorie
Naturkunde
Stufe
Grundschule
Erstellt / Aktualisiert
11.04.2013 / 21.04.2013
  • 1  / 21

Lernkarten

Dolomite

n vs. rho

n>rho

Limestone n vs. rho

n=rho

Chert

n vs. rho

rho>n

Shale

n vs. rho

n>>rho

Sandstone

n vs. rho

both high

rho>n

Coal

n vs. rho

both massive ie. repeated scale

rho>n

Gamma ray variations?

shaly increases, low for everything else

Ironstone

n vs. rho

very low rho i.e off end of scale

 

Halite

n vs. rho

rho>>>n

extremes

Gypsum

n vs. rho

largest n (extreme)

average rho

 

Anhydrite

n vs. rho

both low

extremes

rho

density porosity

n

neutron porosity

primary vs. secondary porosity

primary=orignal

secondary=created after diagenisis

chert limestones dolomite

density and neutron log order

cold long days precede nights

when log gets stuck (caliper)

fake kick in neutron log

NMR affects what water?

free water

How does NMR work?

 (hydrogen protons) of the free water are made to spin at 90 degrees to earths axis

signal of how much they are spinning is recorded

The initial maximum amplitude of the received signal is proportional to the formation POROSITY

The decay rate of the received signal is related to molecular interactions taking place in the fluid and is related to the pore- and grain size distribution

what information can NMR give?

Clay-bound water (CBW)   Capillary-bound water (BVI)   Producible fluids (BVM

Evaporite n and rho logs graphs

Melde dich an, um Bilder anzusehen.

.

Chert resistivity on the log

less conductive

Lernen