neutron theory

8/9/2019 Neutron theory

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HALLIBURTON


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NEUTRON TOOLS

EPITHERMALEPITHERMAL

THERMALTHERMAL

PULSEDPULSED

NEUTRONNEUTRONTMD

TMD-L

PSGT

RMT

Spectral Flow


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CLASSIFICATIONS OF

NEUTRONS

HIGH ENERGY

FAST

INTERMEDIATE

EPITHERMAL

THERMAL


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NEUTRON/GAMMA LIFE CYCLE

I N E L A

S T I C

G A M M A R

A Y S

High Energy Fast IntermediateEpitherma Therma

C A P T 2 R

E

G A

M M A

R A Y S

PSGT,RMT

R C/O, R Ca/Si

DSEN

φDSEN

DSNT

φDSNT

TMDL,

RMT

time

SpFl

INELASTIC/ELASTICELASTIC

ELASTIC/

ABSORPT

Σ FM

ABSORPTION

ACTI#ATI3N GAMMA RAYS Water

Flo


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NEUTRON INTERACTIONS

WITH MATTER

INELASTIC SCATTERINGINELASTIC SCATTERING

ELASTIC SCATTERINGELASTIC SCATTERING

THERMAL NE2TR3NTHERMAL NE2TR3N

A.S3RPTI3NA.S3RPTI3N


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Fa!t Ne"tro#

Tar$et N"%le"!

Tar$et N"%le"!i# a# e&ite' !tate

GammaRa(!

Tar$et N"%le"!ret"r#! to ori$i#al !tate

)E*+e,ore- . )E*re%oil- / )E*!%attere'-

I ELASTIC SCATTERI G

ELASTIC SCATTERI G

!E "EFORE ≠ !E AFTER #RECOIL$ % !E AFTER #SCATT$

I ELASTIC GAMMA RAYS

ELASTIC GAMMA RAYS

ELASTIC GAMMA RAYS

ELASTIC GAMMA RAYS


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I#%i'e#t Ne"tro#

S%attere' Ne"tro#

Re%oil N"%le"!

. S%atteri#$ A#$le

. Re%oil A#$le

)E*+eore- . )E*re%oil- )E*!%attere'-

INCIDENTINCIDENT

NE2TR3NNE2TR3N

SCATTEREDSCATTEREDNE2TR3NNE2TR3N

REC3ILREC3ILN2CLE2SN2CLE2S

4 SCATTERING ANGLE4 SCATTERING ANGLE

4 REC3IL ANGLE4 REC3IL ANGLE

ELASTIC SCATTERI G

LASTIC SCATTERI G

!E "EFORE & !E AFTER #RECOIL$ % !E AFTER #SCATT$

♠

http://interactions2.ppt/http://interactions2.ppt/


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ELASTIC HEA'(ON COLLISION

( )* -ma& FE

M

M loss =

+

0

12

M . Mass o5 struc6 nuc$eus in AM2

M . !( 5or 'rotons or neutrons

( FE )ma& loss . Ma7imum 5ractiona$ energy

$oss o5 neutron


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E$ement Mass Ma7, Energy Loss

H('ro$e# 1 AMU 1334

Car+o# 12 AMU 254

O&($e# 16 AMU 224

Al"mi#"m 27 AMU 104

Lea' 237 AMU 24

MA)IMUM FRACTIO AL E ERGY LOS


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CROSS SECTION

The term *Cr+ss Se,ti+n* ,an

-e th+.ght +/ as a meas.re +/

the pr+-a-iity that a n.,ear

e0ent 1i +,,.r -et1een a

parti,e and a target2

Cr+ss se,ti+n is .s.ay

e3pressed in terms +/ the

e//e,ti0e area 1hi,h a singe

target presents t+ the in,+ming

parti,e


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CROSS SECTIONS

SLOWING DOWN CROSSSLOWING DOWN CROSS

SECTIONSECTION

CAPTURE CROSS SECTIONCAPTURE CROSS SECTION


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E$ement

Sym&o$ Cross SectionCo$$isions to ","01

e#

Ca'ture S$o8ing

H 3893 2383 15

Be 3831 681 57

B 733833 983 13:

C 3833 085 11:

N 1855 1383 193

O 3833 081 1:3

Na 38:1 98: 21:

M$ 3803 986 227

Al 3829 18: 2:1

Si 3819 187 261

S 38:9 18: 2;7Cl 91863 1383 92;

) 2823 18: 962

Ca 3809 ;8: 971

Fe 28:3 1183 :10

C' 2:33833 :89 1325

SLO4I G 'O4 A '

CA5TURE CROSS SECTIO S


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EUTRO MIGRATIO 5ROFILE

SMALL

HY'ROGEN

CON2

LO4 5OROSITY

HIGH COUNTRATE

LARGE

HY'ROGEN

CON2

HIGH 5OROSITY

LO4COUNT RATE

THERMAL

NEUTRON

'IFFUSION

5HASE

FAST

NEUTRON

MO'ERATION

5HASE

S 3 2 R C E

D E T E

C T


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In a +rmati+n 1ith argeam+.nt + hydr+gen6 s+.r,e

ne.tr+ns 1i -e s+1ed m+re

7.i,8y than in +rmati+n 1ithitte hydr+gen2

HIGH HYDR3GEN C3NTENT 4 L3+ C32NTS

HY'ROGE EFFECT O

EUTRO TOOLS


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E$ement

Sym&o$ Cross SectionCo$$isions to ","01

e#

Ca'ture S$o8ing

H 3893 2383 15

Be 3831 681 57

B 733833 983 13:

C 3833 085 11:

N 1855 1383 193

O 3833 081 1:3 Na 38:1 98: 21:

M$ 3803 986 227

Al 3829 18: 2:1

Si 3819 187 261

S 38:9 18: 2;7Cl 91863 1383 92;

) 2823 18: 962

Ca 3809 ;8: 971

Fe 28:3 1183 :10

C' 2:33833 :89 1325


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8

T4O IM5ORTA T

ELEME TS FOR

EUTRO THEORY

A ALYSIS

T1+ eements6 hydr+gen and

,h+rine6 d+minate the resp+nse +ne.tr+n t++s2 Hydr+gen pr+0ides the

-est materia +r s+1ing ne.tr+ns t+

a therma e0e2 On the +ther hand,h+rine is a 0+ra,i+.s de0+.rer +

therma ne.tr+n6 a-s+r-ing them a

h.ndred times aster than m+st

+ther eements2


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< S$o8ing Do8n Length 9Ls : ; 9cru/e$y s'ea6ing: the

a


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Poro!it(

4

Sloi#$ Do#

Le#$t= L !

*%m-

T=ermal Di"!io#

Le#$t= L t *%m-

Fre!= Water Salt Water

Total

Mi$ratio#

Le#$t= M

*%m- Salt

Water

9 2183 ;85 586 298;

11 1:80 583 :86 1786

29 1289 689 987 198;90 1385 :80 28; 1282

:3 ;86 080 281 1386

133 785 285 182 589

CHARACTERISTIC LE GTHS


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HY'ROGEN IN'E)

It i! more %orre%t to reer to t=e Ne"tro# 'eri>e'

poro!it( a! a Hy/rogen In/e7, !i#%e t=e poro!it( i!

i#'ire%tl( mea!"re' t=ro"$= t=e e>al"atio# o=('ro$e# %o#te#t8

H.I. = grams Hydrogen / cc in formation

grams Hydrogen / cc in fresh water at S!


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NEUTRON TOOLS RES5ONSE

COM5ARISON

E5ITHERMAL

TOOLSHydr+gen

Inde3

THERMAL

TOOLS

Hydr+gen Inde3 %

Capt.re Cr+ss#therma$

'SEN

'S T


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THERMAL TOOL


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'UAL S5ACE' EUTRO TOOL

SOURCE

SHORT S5ACE'

'ETECTOR

LO G S5ACE'

'ETECTOR

O4S5RI G


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EUTRO SOURCE

The ,hemi,a s+.r,e .sed -yHai-.rt+n is Am"e2 The n.,ear

rea,ti+n in0+0es the ameri,i.m

pr+d.,ing apha parti,es that,+m-ine 1ith -eryi.m in the

rea,ti+n -e+19

-63*02297;9201;: KeV He Np Am γ ++→

-718:*13

126

;0

02 MeV nC Be He ++→+


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THERMAL 'ETECTOR

AN3DE

He GAS CATH3DE@

-Me?76:83*11

91

92

13 ++→+ H H Hen


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AN3DE

He GAS CATH3DE@

E5ITHERMAL 'ETECTOR

CADMIUM


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'UAL 'ETECTOR TOOL

RES5O SE TO CHA GES I

CEME T THIC! ESS

Rea'i#$ at A it= 3@ %eme#t

. 23

Rea'i#$ at A it= 1@ %eme#t

. :8;Rea'i#$ at A it= 2@ %eme#t

. 187:

;:81;83

7:81==

B

A

;7819

;8:==

B

A

38213

23==

B

ACeme#t T=i%#e!! 3″ , ratio

Ceme#t T=i%#e!! 1″ , ratio

Ceme#t T=i%#e!! 2″ , ratio


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"OREHOLE COM5ENSATION

"y .sing a rati+ + the reading

at the t1+ dete,t+rs6 1e ,an

red.,e the ee,ts + the

-+reh+e 6,asing 6 and ,ement 2

"y .sing a rati+ + the reading

at the t1+ dete,t+rs6 1e ,an

red.,e the ee,ts + the

-+reh+e 6,asing 6 and ,ement 2


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THE 'SNT RATIO TO 5OROSITY

TRANSFORM

#!%ali+ratio

!=oprom%omp"te'i!Gai#@@

ratio-*ra*Gai#-R

ratio#ormalie'R

%o#!ta#ta

R a888R aR aa*R-

i

i

3ii

2213

=

=

=

=+++= ∑=

φ

♣


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VERTICAL RESOLUTION

2 INCHES

DEPTH OF INVESTIGATION

! TO "2 INCHES


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STAN'AR' TOOL

4ATER TAN!

LOGGING TOOL

♣

FORMATION


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FORMATION

EN:IRONMENTAL EFFECTS

ON THE NEUTRON5OROSITY

LITHOLOGY EFFECT

SHALE EFFECT

GAS EFFECT


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LITHOLOGY EFFECT

'ierent +rmati+n types ha0e dierent

a-iities t+ s+1 d+1n and ,apt.re

ne.tr+ns2 This ma8es +.r ne.tr+n p+r+sity

ith++gy dependent2


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Minera$ Com'osition Ls 9cm:

*,-Me# to !,*- e<

Porosity Com'are/

to 3 Porosity

Limestone

Dolomite CaM$*CO9-2 2382 38;

Cal%ite CaCO9 2989 383

"artB SiO2 2587 183

A#=('rite CaSO0 9381 183

Halite NaCl 9685 183

G(p!"m CaSO0•2H2O :9

NEUTRON SLO4ING 'O4N

LENGTHS

♣

SHALE EFFECT


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SHALE EFFECTThe ne.tr+n t++6 resp+nding t+ the

t+ta am+.nt + hydr+gen in the

+rm + 1ater6 1i ,+nsider the

0+.me +,,.pied -y -+th -+.nd and

ree 1ater as p+r+sity in shaes2

Sin,e the -+.nd 1ater isstr.,t.ray and ,hemi,ay -+nded

t+ the shae6 the ne.tr+n p+r+sity

reads t++ high2

Shaes ,an as+ ha0e .n.s.ay argetherma ne.tr+n ,apt.re ,r+ss

se,ti+ns # e2g2 "+r+n$2 This ma8es

therma ne.tr+n t++s read e0en

higher +r the p+r+sity2


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NEUTRON SHALECORRECTION

shaleneutron shneutroncorr neutron V −− −= φ φ φ

Here φ neutron-shale i! t=e #e"tro# poro!it( i# a #ear+(

!=ale


38/42

GAS EFFECT

"e,a.se + the +1 am+.nt + hydr+gen in

gas6 the ne.tr+n t++ sees gas as resh

1ater +,,.pying a smaer 0+.me than

the a,t.a 0+.me present2 The p+r+sitythere+re reads t++ +12

As+ the e3,a0ati+n ee,t ( 1hi,h states

simpy that gas in the r+,8 1i ,a.se essr+,8 materia t+ -e present t+ s+1 d+1n6

s,atter6 +r a-s+r- the ne.tr+ns ( 1i ,a.se

the p+r+sity t+ appear e0en +1er2


39/42

NEUTRON

EN:IRONMENTALCORRECTIONS

♣

Effects Litho"ogy+∆+∆+

∆+∆+∆+

∆+∆+=

−

−−−−

salt tformtso

pressbhtempbhmw salt bhtmc NL C!"" NL

φ φ

φ φ φ

φ φ φ φ


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♣


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♣


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neutron theory

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