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From YouTube: EOSC 350 DC 3
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A
Actually,
because
you've
done
done
in
the
labs,
you've
actually
seen
a
lot
of
this
stuff,
so
we
can
go
through
it
fairly
quickly
and
yeah.
Just
make
sure
that
you
you've
got
everything
so
here's
the
first
point
occurred
into
the
ground
and
then
we
go
like
that
and
we
can
measure
the
potential
and
we've
got
an
expression
for
the
potential
we
could
rearrange
cannot
get
through
the
true
reasons,
DivX.
A
A
When
I
have
a
layered
earth,
however,
the
currents
are
going
to
go
in
different
directions
are
as
the
channel
games
layers
that
there's
high
conductivity
or
low
resistivity.
So
here
you
can
see
what's
happening
here.
We've
got
a
low
resistant
layer
and
the
currents
in
channel
through
and
the
apparent
resistivity
then
we'll
change.
It
won't
be
the
value
of
the
top.
It
won't
be
at
value
the
bottom.
It's
going
to
be
something
in
the
bill.
A
For
instance,
here
with
this
electrode
in
green
parrot,
resistivity
is
226,
that's
greater
than
100
is
less
than
plastic,
and
you
had
a
half
that
tube
that
you
use
in
the
lab,
so
I
think
you're.
Familiar
with
that.
The
one
thing
that
we
didn't
explicitly
talk
about
was
different
geometries,
that
we
talked
about
soundings
and
a
sounding
was
when
you
take
a
particular
jump,
really
just
expanded
around
some
central
point.
So
there
was
two
there's
the
winner
sounding
in
which
the
distances
between
all
the
electrodes
are
a
that's.
A
What
you
use
in
well
there's
also
called
a
Schlumberger
term
in
which
you
have
the
a
and
B,
but
the
potential
electrodes
are
kind
of
a
little
bit
more
on
the
inside,
so
they're,
basically
kissing
cousins,
but
sometimes
you
hear
somebody
say:
oh
I
didn't
do
a
number
J
experiment,
somebody's
going
to
weather
and
all
the
difference
is,
is
where
those
potential
yeah
again
with
a
sound
name,
is
that
if
you
take
I
leave
these
configurations,
you
take
a
separate
one.
You
expand
out,
then
gradually
you're
you're
seeing
deeper
and
deeper.
A
So
this
is
what
we
saw.
Then
we
had
everything
really
close
together.
The
currents
are
in
here.
The
apparently
stupid
is
essentially
just
that
from
the
upper
upper
layer.
It's
100
feet,
however,
as
you
go
farther
how
the
currents
are
slipping
into
the
ground,
the
apparently
system,
it
is
a
135
and
we
can
start
to
plot
this
on
what
we
call
a
sounding
curve
and
as
we
go
even
farther
any
apparent
reasons
to
be
tell
yourself
so
plotting
all
those
things
get
a
sounding
curve.
A
That
is
just
the
data,
and
what
we
really
want
to
do
is
to
see
okay.
Can
we
take
this
data
and
map
it
into
a
true
resistivity
structure?
The
one
thing
that
was
important
to
bring
a
lab
was
that
in
order
to
see
deep,
but
have
you
got
a
layer
of
some
thickness
L
in
order
to
see
the
bottom
of
that
layer,
and
then
you
actually
have
to
have
electrodes
that
are
significantly
bigger
than
at
least
a
factor
of
three
or
maybe
four
o'clock.
A
We
didn't
turn
to
me.
We
didn't
talk
about
information,
but
what
what
we
want
to
do
is
to
take
our
data
to
look
like
the
SS
are
sounding
cur
and
you
go
invert,
those
to
get
a
true
representation
of
the
resistivity
structure
as
a
function
of
depth.
So
this
is
an
apparent
reason,
stivity
structure,
as
a
function
of
some
kind
of
scaling
the
length
right
I'm
coming.
So
it
tells
me
something
about
what's
what's
happening,
but
certainly
not
the
detail
that
you
want.
So
when
we
go
work
for
a
technical
company.
A
If
we
have
a
confined
conductor
so
suppose
that
we've
got
something
that
looks
like
this
and
you
notice
that
the
current
lines
change,
they
kind
of
go
around
the
region,
that's
resistive
and
it
kind
of
gets
sucked
in
through
regions
that
are
conductive.
You
had
an
app
that
looked
at
what
happens
for
confined
bodies.
So
here's
an
example
where
we
put
a
cylinder
into
an
earth.
A
We've
got
an
a
electrode
here
and
it
being
let's
come
here,
so
the
current
goes
from
A
to
B,
but
it
does
so
in
a
way
that
it's
kind
of
deflected
by
this
cylinder-
and
you
see
what
happens
here
so
it's
coming
in
and
then
it
goes,
it
kind
of
gets
sucked
into
that
conducting
sphere
and
then
kind
of
comes
back
up.
So
the
current
is
actually
kind
of
changing
directions
from
what
it
was
in.
Just
a
uniform
half
space
so
for
a
homogeneous
earth
means
something
it
looked
like
that
for
a
conductive
sphere.
A
A
In
the
lab
kind
of
talked
about
this,
those
a
little
brief,
and
that
is
that
the
fact
that
if
current
is
going
to
flow
through
a
body,
it
must
do
so
in
such
a
way
that
the
normal
component,
that
current
density
is
discontinuous.
So
if
I
know
this
box
is
sitting
here,
it's
a
different
connectivity.
No
as
it
comes
in
through
this
interface,
whatever
current
is
going
to
America's
going
to
be
coming
out
here,
so
that
has
to
be
coming.
A
That
means
J,
which
is
the
normal
of
the
current
density.
This
has
to
be
equal
on
both
sides,
but
then
J
Ohm's
law
says
that
J
is
equal
to
Sigma
times
e,
so
Sigma
1
e
1
has
to
equal
to
Sigma
2
e
2.
In
this
case
the
1
and
the
2
refer
to
ok.
The
incident
million
died
in
as
what
and
2
is
the
medium
that
going
into
it.
So,
in
this
case,
here
I've
got
a
medium.
A
A
A
A
You
see
they're
pointing
in
opposite
directions.
That
means
that
if
Samantha's
charge,
okay
I'm
coming
over
this
way,
I'm
going
to
see
an
electric
field
for
her
that's
going
on
this
way.
However,
in
this
site,
it's
going
to
be
this
way.
So
in
one
case,
if
my
initial
electric
field
is
going
like
this,
it's
going
to
be
reduced
and
then
over
here
it's
going
to
be
increased
okay,
so
that
is
how
we
change
the
electric
field
and
I
can
feel
then
that
allows
my
currents
to
go
around.
A
So
this
is
the
fundamental
physics
of
what
is
going
on,
but
it's
actually
even
more
important
than
that,
because
the
thing
that
we're
going
to
make
remember
we're
just
measuring
potentials.
So
each
you
know
each
charge
that
I
have
is
ready
to
be
some
electric
potential
up
here.
So
the
end
result,
existence
of
this
conductor
is
totally
107
absolutely
defined,
but
all
the
charges
that
are
built
up
in
here
and
these
charges
we
often
refer
to
them
as
the
secondary
charge.
So
memory
had
a
toggle
button,
there's
total
charges.
A
The
total
charge
is
everything:
okay,
so
never
a
battery
up.
That's
like
some
big
cube
here
and
here's
a
negative,
Q,
okay
and
now
in
this.
So
if
we
have
a
homogeneous
emphasis,
Oh
God,
if
we
have
a
cylinder
in
here,
okay,
then
we're
going
to
give
this
negative
charge
in
here
and
a
positive
charge
and
then
we're
going
to
measure
you
know
whatever
potential
we
have
associated
with
these
charges
them
so
total
charges,
everything
and
the
secondary
charge
is
just
whatever
is
this
chicken
fossils?
A
So
the
only
thing
that
you
kind
of
need
to
know
that
is
this.
We're
going
to
here,
because
the
thing
that
you're
often
interested
in
is
like
okay,
what
what?
What
sign
is
a
charge
rubies
that
positive?
So
just
because
the
current
is
coming
like
this
doesn't
necessarily
tell
you
what
the
charge
is
going
to
be
here.
That
charge
is
distinguished
by
whether
or
not
you're
going
from
a
resistor
to
a
conductor.
Our
conductor
is
this,
so
in
this
case
here
these
rows
up
here
again,
our
medium
one,
video.
A
A
490
is
equal
to
top,
so
I'm
going
to
I'm
going
to
have
a
negative
value
if
it
goes
from
a
resistor.
Another
Congress
Lee,
if
I
go
from
inside
to
outside
I
can
go
from
ten
to
a
hundred.
So
now
Row
1
is
10.
Row
2
is
500,
so
it's
going
to
be
so.
This
is
two
important
things.
One
is
I've
got
it.
If
I've
got
a
current,
that's
coming
in
to
something
that's
changing
its
conductivity
I'm
going
to
build
up
a
charge
and
the
other
is
okay.
What
sign
is
there.
A
A
A
A
A
Yeah,
so
they
just
to
remind
you
again,
the
total
potential
okay
is
the
sum
of
all
the
charges,
including
these
guys
here,
and
the
secondary
potential
is
just
you
two
guys
here.
So
the
total
potential
for
that
cylinder
looks
positive
here
negative
up
here.
But
if
you
just
look
at
the
secondary
pretender,
you
just
see
this
tennis
was
doing
charges.
A
A
Right
so,
if
I
get
something,
here's
what
my
charges
are
gonna
be
right.
So
that's
that
sort
of
sets
up
experiment
now
you
want
to
come
and
do
a
measurement.
Okay,
so
I'm
going
to
do
a
measurement
over
here
right
and
so
I'll
calculate
a
delta,
V
and
then
I'll
calculate
an
apparent
resistivity,
which
is
B.
A
A
What,
when
I'm
sitting
well
in
this
case,
I'm
sitting
right
over
top
so
I
got
here
and
what
do
I
see?
I
see
an
apparent
resistivity
with
430
meters,
so
that's
less
than
500
right
so
and
I've
got
dr.
fear,
low,
resistivity,
so
that's
not
good
and
if
I
go
way
out
to
the
side,
I'm
kind
of
removed
from
that
I
basically
see
500.
A
So
as
I'm
moving
along
from
here
across
here,
my
apparent
resistivities
are
going
to
change
from
the
background
500
to
something
that's
a
little
bit
lower.
This
gives
4:30
and
then
back
up
to
5
times
so
I'm
not
getting
down
like
it's
Auggie's.
The
1000
meters
I'm
looking
for
I'm,
not
getting
out
of
10
meters,
because
I'm
kind
of
done
with
food
by
touch
that
face
yeah
slope.
So
I've
seen.
A
So
what
that
does
is
start
to
give
us
an
idea
of
okay.
How
could
we,
how
could
we
set
all
of
this,
our
so
that,
if
I'm,
let's
suppose
I'm
I'm
looking
for
Samantha
at
this
point?
Okay,
so
now
you're
a
conductor,
sister
and
I'm,
going
to
try
to
find
you
right
so
I'm
going
to
start
off
with
an
array
that
I'm
just
going
to
move
over
over
top
and
I'm
going
to
start
off
with
an
array
that
looks.
A
This
so
it's
going
to
be
an
A
and
a
B
that
are
short
and
a
man
and
an
that
are
also
short
and
everything
is
going
to
be
together.
So
this
is
like
a
it's
like
a
dipole-dipole
and
I'm
just
going
to
now
remember
the
depth
of
penetration
that
I
get
is
such
that
my
array
has
to
be
bigger
than
my
get
to
the
Y
here.
A
So
if
I'm
good
try
to
see
some
a
tiny
drain,
this
like
this
size
and
then
I
can
just
go
all
along
and
I
could
keep
going.
Alan
stop
any
like.
I
can
see
this
right.
That's
because
my
depth
of
penetration
sort
of
tuned
to
this
particular
gender,
but
I
cannot
see
Josh
I.
Just
don't
go
down
that
far.
So
what
am
I
going
to
do
to
see
you
I
could
I
was
not
thinking
like
okay.
This
is
the
ground.
A
A
A
Is
it
don't
keep
this,
let's
suppose,
I'm
trying
to
find
this
sphere
if
I
start
off
with
something
that
looks
like
this
and
I
come
along
and
I
do
the
profile
on
here
then
I
have
just
see.
500
millimeters
I
just
see
this
stuff
up
at
the
top,
but
if
I
make
this
array
bigger
and
I
move
it
along
now
that
I
get
I,
get
something:
that's
basically
500
old
meters
again,
but
in
the
middle
so
horizontally
I
kind
of
got
this
guy
male,
it's
good!
A
A
A
A
Suppose
I
took
this
beet
electrode
here
and
I
just
ran
it
way
out
here.
So
this
the
electrode
is
still
any
circuit,
but
it's
so
far
away.
I,
don't
really
play
a
big
role
in
that
case,
I
just
got
a
current
pole,
so
this
is
my
pool,
and
this
is
life,
so
we
often
refer
to
this
system
as
a
full
dipole
system,
Congress
Lee.
A
How
can
you
think
that
you
run
this
guy
out
and
put
the
an
electrode
up
here,
in
which
case
I
now
have
a
current
at
protections
and
they're,
both
kind
of
like
polls?
So
now
it's
called
a
whole
whole
experiment
in
yeah.
You
have
all
of
these
things
for
doing
dipole-dipole
pull
pull
pull
dipole.
You
do
all
of
those
things,
and
that
is
just
referring
to
these
configurations
and
you
think
this
is
actually
not
used
in
practice.
If
you
go
to
the
mineral
industry
and
they're
looking
for
something,
that's
deep
suppose,
you've
got
a
buffer.
A
Okay,
so
that's
it
configurations,
and
now
here
we
come
to
the
plodding
which
again
I
try
to
get
there
every
more
than
four
electrodes
in
the
survey
like
this
know.
Every
time
you
well
every
time
you
take
a
number
you're
activating
to
elect
roses
currents
into
as
potentials.
In
fact,
when
you
actually
go
out
and
collect
data,
Brady
geotechnical
company
I
can
go
over
for
gold
or
something
like
that.
What
they're
going
to
do
is
lay
out
an
array
of
electrodes.
A
That's
maybe
very
office
like
120,
you
have
a
120
electrodes
just
laid
about,
and
then
you
have
a
little
box
that
you
can
activate.
So
this
is
one
two
three
you
can
activate
5
as
an
electrode,
and
then
this
one
here
and
the
electrode
assessment
and
electrode-
and
this
is
an
electrode-
you
can
program,
so
you
just
does
he
do
all
versus
they
over.
You
lay
out
all
of
the
electrodes
and
then
you
just
program
like
okay
I,
want
that.
I
want
this
guy.
A
At
some
point
of
view,
current
later
on,
I'm
gonna
be
using
this
potential.
That's
kind
of
what
we're
we're
sort
of
doing
up
here.
So
whatever
they're
showing
you
now
is
that
student
section
how
you
plot
that
guy,
so
here's
it
here's
a
dipole-dipole,
okay
and
remember
in
the
lab
I
said
well,
I,
not
blot
this
guy,
and
the
answer
was
that
I'm
going
to
just
choose.
A
A
A
So,
where
am
I
going
to
plot
this
who'd,
even
save
it
45-degree
line
here.
A
So
this
this
depth
on
here
it's
called
a
pseudo
yeah.
It's
just
some
behind
innocent
okay,
somehow
we're
looking
deeper
right.
So
the
idea
that
that
goes
are
farther
apart,
depending
some
sense
to
plot
numbers
in
this
way,
so
that
Ligny
size
of
the
array
is
large.
I
bought
it
/
when
the
size
of
your
a
it's
small
here,
Jason,
that's
less
flexible.
A
A
What
you're
gonna
see
here
this
is
now
generally
how
the
data
part
are
for
kickin.
It
suppose
we
do
a
pullback
whole
furnace
and
and
where
they
fix
this
guy
here
and
then
just
move
this
one
progressively
outward
and
then
we're
going
to
move
everything
over
to
do
the
same.
So
as
we
move
it.
Oh
there
were
expecting
things
to
plot
along
a
line
like
this
and
then,
as
we
shift
things
over
we're
gonna
be
plugging
this
dock
dock.
So,
let's
see
whatever.
A
Okay.
Now
you
get
a
picture,
my
thing
starting
to
look
like
geology
hey.
So
what
do
we
got
here?
First
of
all,
it's
an
apparent
resistivity,
so
just
those
numbers
that
you've
got
before
this
is
true
horizontal
distance
on
here.
This
is
some
kind
of
death.
If
we
look
at
the
scale,
the
blue
is
resistive
and
the
red.
A
A
So,
let's
take
a
look
at
what
those
things
are
and
by
the
way
we
call
them
pseudo
sections
right.
So
we
called
this
thing
here
when
we
got
a
pseudo
section,
it's
not
a
real
thing.
It's
just
a
way
of
plotting
the
data,
but
sometimes
I.
Look
at
this.
You
can
actually
get
out
of
some
geologic
information.
So
here's
a
here's,
a
prison
and
we're
going
to
go
ahead
and
we're
going
to
do
that.
We
just
give
the
experiment
over
top
and
when
I
do
that,
I
get
out
of
Ceuta
section
that
looks
like
this.
A
So
that's
kind
of
cool,
so
I
I,
don't
have
an
image
of
the
block,
but
you
know:
there's
something
dirty
that's
happening
in
this
region
looks
like
there's
some
pant
legs,
you
know,
but
with
a
little
bit
of
you
know,
expertise
and
you
might
think.
Oh
maybe
I
could
drill
down
an
ear
and
I
might
hit
something.
Yep,
cool
location
of
the
object,
business
reason
that
that's
right,
we
do
at
this
point.
We
don't
really
know
what
that
depth
is.
We
could
kind
of
make
a
conversion
say
like
okay.
A
Okay,
so
that's
that's
a
pseudo
section
and
there
for
many
many
years
there
were
people
around
Oh
businesses
that
claim
that
they
could
look
at
this
and
understand
about
the
geology
was
sometimes
more.
So
let
me
show
you
what
happens
so
suppose.
I
take
this
the
same
little
thing
we
got
here
and
I
I
alter
I'm,
just
gonna
put
a
little
bit
of
background
junk
in
there.
No
maybe
move
is
a
graphite
plays
or
whatever,
and
it's
actually
going
to
look
like
this.
A
A
A
So
here's
an
example
where
you've
got
an
image
of
ography,
that's
what
this
is
and
there's
kind
of
a
resistible
reverb
and
then
there's
two
conductivity
blocks
that
are
kind
of
smoothed
off
was
over
here
and
one's
over
here.
So
that's
what
you're
looking
for,
if
you'd
like
to
find
those
two
guys,
so
you
go
ahead
and
you
do
g-series,
do
an
experiment
and
you
plot
up
your
pseudo
section
and
look
what
you
get
got
this
great
big
red
someone
shot.
That
looks
good
right.
People
love
to
grow
up
in
spots.
A
But
that's
what
we
want
to
do
and
virtually
any
recent
given
T
datasets
that
you
get
from
in
geotechnical
company
or
in
there
they
will
have
gone
through
this
inversion
process.
So
here's
what
happens.
So
if
we
do
that
buried
prism,
it's
this
here
is
the
pseudo
section.
If
we
now
know
she's
me
take
any
invert.
Those
data
we
actually
get
a
resistivity
structure
looks
like
this.
A
So
that's
pretty
nice.
So
this
is
this
is
true
depth
in
meters
or
is
on
a
location,
and
if
we
look
to
see-
but
this
is,
it
is
actually
centered
completely
right
above
that
true
body,
we
don't
have
the
sharp
spies
or
anything
like
that
part
of
that's
the
nature
of
the
universe
star,
because
we're
asking
for
simplicity
and
smoothness
and
stuff
like
that.
So
you
see
how
this
is
kind
of
smooth
dots.
These
contours
are
contras
resistivity,
but
that
is
now
a
very,
very
nice
representation.
This
and
the
forward
model
data.
A
Let's
go
in
as
harder
example,
member
this
guy,
so
here
was
our
resistivity.
All
that's
got
all
this
job.
Here's
the
suna
section
can't
see
anything,
however,
view
invert.
Those
data,
you
know
something
to
the
cool
part
of
this
is
that,
first
of
all,
not
only
do
you
find
this
target
okay,
but
you
actually
are
finding.
You
know
these
other
conductor
here,
but
maybe
they're
just
geologic
comments,
but
there's
some
information
whatever
this
says
signals
both
about
what's
happening
your
surface
and
what's
happening.
So
maybe
that
kind
of
helps
answer
answer
your
question.
A
And
if
we
do
this
example
here,
where
we
have
our
more
complicated
model
with
topography
here
is
our
two
section
go
ahead
and
B
invert.
These
data
may
end
up
for
something
that
looks
like
this,
so
that
we've
actually
got
a
pretty
good
consensus.
There's
a
conductor
here
and
there's
one
over
here:
don't
have
all
the
details.
We
don't
have
enough
depth
of
investigation
to
really
see
this
bottom
part
doing
things
are
you
know
going
to
smoother?
A
So
the
that
kind
of
takes
you
through
some
of
the
important
points:
mr.
Reaves,
that's
concept
of
profiling
and
sounding
putting
back
together
getting
out
a
pseudo
section
for
data
converting
those
data
to
get
a
recent
study
stretcher,
so
the
weirdest
redeemed
that
can
make
some
of
the
problems.
You
really
don't
watch
more
complicated
because
you've
got
to
worry
about.
You
know
the
target
shape
size.
So,
first
of
all,
let's
talk
about
how
many
people
put
their
name
tags.
A
A
So
were
mystery
right,
so
that
means
there's
questions
about
the
currents
potentials.
Just
like
there's
kind
of
hot,
dating
issues,
issues
on
how
to
do
things
and
yeah.
The
important
thing
is
is
sensitivity.
I'm
only
going
to
say
one
thing,
I
would
ask
the
question
but
sensitivity.
If
somebody's
are
talking
about
sensitivity,
then
they're
talking
about
how
much
signal
there's
going
to
be
from
that
check
out
so
suppose.
Suppose
it's
Stephanie
that
I'm
putting
on
then
and
then
the
question
is
okay.
A
Is
my
survey
isn't
going
to
be
sensitive
to
the
existence
of
Stephanie,
so
that
means
first
of
all,
my
source.
If
that's
gonna
work,
my
source
has
to
excite
her
right,
so
I
have
to
be
driving
currents
down
into
you
right
so
that
there's
enough
charges
that
are
built
up,
that's
the
first
part.
The
second
part
is
my
receiver
I.
Think
oh
snap
members
potential
electrode
so
I
need
to
be
close
to
my
charges
in
order
to
see
something.
A
It's
a
mineral
deposit,
there's
volcanic
units
up
here,
there's
siltstones
and
there
is
generalized
so
here
there's
a
particular
region
that
has
got
a
mineralization,
that's
associated
with
it,
and
that
is
the
question
is:
can
we
find
a
conductive
unit,
okay
within
a
whole
bunch
of
siltstones
and
volcanic
s--?
Can
we
find
that
and
can
be
identified
with
the
t-statistic?
A
So,
first
of
all,
of
course
we
need
to
know
what
the
resistivities
r-right,
because
we
we
cannot
distinguish
something
unless
that
something
has
got
a
very
different
reason
city,
then
in
the
neighbors.
So
if
I'm
going
to
the
stage
parina
from
Stephanie,
they
better
be
different
values
right.
Otherwise,
there's
me
more
so
when
we
look
at
this
and
now
I'm
going
to
go
to
conductivity,
because
the
numbers
are
so
big
that
there's
some
numbers
here
that
are
low,
there's
volcanic
they're,
very
low
conductivity.
A
The
thing
that
we're
looking
for
is
something
called
a
mountain
over
horizon.
Yes,
that's
conductive,
there's
some
snow
stones
in
there
and
everyone
can
moderate
connectivity
and
there's
also
another.
You
know
it's
called
a
breakaway
shale
or
black
shale.
It's
got
a
very
high
conductivity.
Those
are
a
rock
units.
We're
gonna
see
what
we
could
do
with
them,
so
we're
gonna
do
an
experiment.
A
So
basically,
what
you
do
is
you
set
out
a
whole
bunch
of
electrodes
on
the
surface
and
then
use
this
guy
as
a
current,
and
you
just
measure
the
electric
potentials
everywhere
else,
and
then
you
bought
this,
the
pseudo
section
and
you
gradually
move
that
current
electrode
over
this
way
and
you
end
up
so
here's
the
region
so
just
for
scale.
This
region
adheres
about
four
kilometers
from
here
to
here.
A
More
or
less
than
the
geologic
structure
is
kind
of
north-south,
and
what
they're
going
to
do
is
to
do
by
ten
lines
of
data
east-west
across
there
and
when
they
do
that.
Each
of
these
is
the
pseudo
section.
That's
obtained,
okay,
so
just
to
kind
of
clarify,
so
we've
got
a
region
in
here
and
we
take
one
line.
Okay,
so
we
do
this
whole
dipole
experiment
and
we
end
up
with
an
intersection.
A
We've
got
another
line
here,
another
one
I'm
here
it
can
lines:
okay,
here's
what
they
are,
but
these
are
ten
lines
of
data
a
little
bit
different.
Some
of
them
are
red.
Okay,
so
you
can
read
stuff
in
here.
That
means
that
there's
something
in
there
that
has
got
a
high
conductivity,
so
something's
happening,
but
really
is
your
day.
So
you've
got
one
3d
geologic
model
and
you
don't
see
that
so
remember,
I
talked
about
exciting.
A
So
this
is
a
pole,
dipole
experiment,
but
we
can
reverse
that
so,
instead
of
having
the
currents
on
this
side,
we
can
put
the
currents
on
the
other
side
and
when
we
do
that,
we're
actually
going
to
have
like
the
leading
is
I'm
calling
it
a
pull.
So
we
call
that
hold
I
quit
now,
there's
a
couple
things
you
might
notice
here.
First
of
all,
then
these
pictures
are
different.
These
pseudo
sections
are
different
than
what
they
were
back
here
by
still
another
channel.
A
A
So
that's
what
we're
going
to
do
so,
how
we're
gonna
do.
This
is
as
follows:
we're
going
to
take
a
mathematical
cube,
okay,
XY
and
Z,
and
we're
going
to
divide
it
up
into
a
whole
bunch
of
themselves,
and
each
of
those
cells
has
got
a
a
constant
value
of
conductivity
but
unknown,
and
so
now
in
the
inverse
problem.
A
So
what
you're
going
to
now
see
is
the
result
of
that.
So
here
there
is
I.
Think
in
this
one
there
was
like
around
a
million
cells,
but
essentially
a
lot
number
to
try
to
find
right.
So
now
we've
got
a
million
parameters
to
try
to
estimate.
So
it's
a
big
computation
problem
and
then
the
end
result
is
this
Q
of
the
number.
So
I've
got
a
million
cells
and
each
one
of
us
got
a
particular
conductivity
and
now
I'm
going
to
pluck
them
and
I'm
going
to
do
that
in
a
couple
of
ways.
A
A
That
slice
I
take
his
cube
and
I'm
gonna
slice
it
it
yeah
and
back
there.
Now
we're
going
to
be
looking
cross-sections
but
into
the
board
and
back
up
and
then
we're
going
to
look
at
plan
view
and
then
we're
going
to
also
spin.
This
whole
thing
around
with
different
volume,
rendering
limits
so
that
we
progressively
end
up
with
only
the
most
conductive.
A
Okay,
so,
first
of
all,
how
cool
is
that
right?
So
we've
taken
20
sections
of
data,
none
of
which
are
have
any
particular
information
in
themselves.
We've
combined
all
of
those
with
your
croquis
questions,
done
an
inversion
and
we
end
up
with
something
now
that
looks
like
yes,
so
Jewishly.
First,
what
the
heck
is
this
thing
that
turns
out
to
be
that
black
shale
unit
ever
I
said
it
was
something
that
was
really
really
productive.
So
that's
what
this
guy
is
so,
first
of
all,
J
logically,
we've
got
a
3d
structure.
A
Is
that
black
black
shale
I'm
marching?
That
is
one
thing.
That's
economically
interesting,
okay,
but
there
is
a
little
dab
of
something
here
which
actually
turns
out
to
be
a
hint
of
that
mountain.
Oh
good,
nice
enough
that
we're
looking
for
and
we're
going
to
revisit
this
because
we're
going
to
do
right
at
the
very
last
we're
going
to
be
something
called
induced
polarization
and
while
we're
doing
the
DC
we're,
also
calculating
the
IP
response
and
I'm
going
to
show
you
how
to
take
that
IP
response
and
calculate
a
three
dimensional
charge
of
mobility.