21. affiah raphael seminar

8/17/2019 21. Affiah Raphael Seminar

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THE EFFECTIVENESS OF THE

VERTICAL ELECTRICAL SOUNDI

TECHNIQUE IN AQUIFERCHARACTERIZATION

AFFIAH RAPHAEL PATRICK1OO813007

supervisor: PROFESSOR E. A AYOLAB


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OUTLINE

INTRODUCTION

HISTORICAL BACKGROUND AND DEVELOPMENT

AIM AND OBJECTIVES

AQUIFER STRUCTURES

METHODOLOGY

CASE STUDIES

CONCLUSION


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INTRODUCTION

Fiure 1: !rou"#$%&er %r'(i&e'&ure %)&er


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INTRODUCTION

Pu+pi" &es&s '%"

pro#u'e re*i%,*ees&i+%&es o)(-#r%u*i' p%r%+e&ers

,u& &(e es&i+%&es %re

*%re*- vo*u+e&ri'%ver%es %"# -ie*#sresu*&s %ppropri%&e &o% s+%** se'&io" o) &(e%/ui)er.

Figure 2: pumping test after Google


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INTRODUCTION

S*u &es& (%s &(e +os&

po&e"&i%* o) &(e&r%#i&io"%* %ppro%'(es)or #e&%i*e#'(%r%'&eri%&io" o) &(ev%ri%,i*i&- o) (-#r%u*i'p%r%+e&ers.

Bu& +os& si&es #o "o&(%ve &(e e&e"sive $e**"e&$or2 re/uire# )oree'&ive %pp*i'%&io" o)&(is %ppro%'(

Figure 3: slug test after Google im


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HISTORICAL BACKGROUND AND

DEVELOPMENT I" &(e perio# )ro+ 1415 &o 1416 Co"r%#

S'(*u+,erer ,e%" (is pio"eeri" s&u#ies$(i'( *e%# &o %" u"#ers&%"#i" o) &(e+eri&s o) u&i*ii" e*e'&ri'%* resis&ivi&-+e&(o#s )or ep*ori" &(e su,sur)%'e.

App*-i" e*e'&ri'%* +e&(o#s &o rou"#$%&erep*or%&io" ,e%" #uri" or*# %r II.

Fre"'( Russi%" %"# !er+%" eop(-si'is&s

%re +%i"*- respo"si,*e )or &(e #eve*op+e"&o) &(e &(eor- %"# pr%'&i'e o) #ire'& 'urre"&e*e'&ri'%* prospe'&i" +e&(o#s.

A*&(ou( &(e +e&(o#s $ere #eve*ope# i"&(e e%r*- 1400s &(e- (%ve ,e'o+e ver-+u'( +ore $i#e*- use# si"'e &(e 1470s#ue pri+%ri*- &o &(e %v%i*%,i*i&- o)'o+pu&ers &o pro'ess %"# %"%*-se &(e #%&%. Figure 4: Conrad Schlumberger a


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AIM AND OBJECTIVES T(e %i+ o) &(is se+i"%r repor& is &o revie$ &(e

ee'&ive"ess o) &(e ver&i'%* e*e'&ri'%* sou"#i" &e'("i/u9ES; i" %/ui)er '(%r%'&eri%&io".

O,


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AQUIFER STRUCTURES

Fiure =: S'(e+%&i' Cross>se'&io"s o) A/ui)


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AQUIFER PARAMETERS

Figure 6: Aquifer parameters after Google images


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METHODOLOGY

Figure 7: asic principles !after "e#nolds$ %&&7'


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Figure (: resisti)ities of roc*s and minerals


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ELECTRODE CONFIGURATION

Figure &: electrode arra# configuration !after "e#nolds$ %&&7'


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THE VERTICAL ELECTRICAL SOUNDING TECHNIQUE

Figure %+: ,ata acquisition and interpretation !after "e#nolds$ %&&7'


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GEOELECTRIC PARAMETERS

A eo*oi' se'&io" #iers )ro+ %eoe*e'&ri' se'&io" $(e" &(e,ou"#%ries ,e&$ee" eo*oi' *%-ers#o "o& 'oi"'i#e $i&( &(e ,ou"#%ries,e&$ee" *%-ers '(%r%'&erie# ,-#iere"& resis&ivi&ies.

T(us &(e e*e'&ri' ,ou"#%ries

sep%r%&i" *%-ers o) #iere"&resis&ivi&ies +%- or +%- "o&'oi"'i#e $i&( ,ou"#%ries sep%r%&i"*%-ers o) #iere"& eo*oi' %e or#iere"& *i&(o*oi' 'o+posi&io"

Figure %%: Geoelectric parameters !aft

O


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ADVANTAGES AND LIMITATIONS

ADVANTAGES

Cos&>ee'&ive %"# e+p*o-s "o">#es&ru'&ive ?e*# &e'("i/ues

Ee'&ive i" %ssessi" &(e /u%*i&- o)rou"#$%&er %"# &(ere)ore '%" ,euse# &o *o'%&e &(e s%*i"e@)res(rou"#$%&er i"&er)%'e

To #e*i"e%&e &(e eo+e&r- o) %/ui)ers%"# o"es )%vour%,*e )or rou"#

$%&er %''u+u*%&io" Provi#es use)u* i")or+%&io" o"

*i&(o*oi' '(%r%'&eri%&io" #ep&( &oresis&ive ,e#ro'2 #ire'&io" o)rou"#$%&er o$ orie"&%&io" o))r%'&ure o"es %"# &(e *o'%&io"s o))%u*&s %"# p%*eo>'(%""e*s %s $e** %s'%vi&ies i" *i+es&o"e.

LIMITATIONS

T(e prese"'e o) ver- (i( oresis&ivi&- sur)%'e soi*s i"&erpre&%&io"

&(ere is "o u"i/ue so*u&io" %"o) e/uiv%*e"& +o#e*s %re )ou"#

ippi" *%-ers #is&or& &(e +e%"# pro#u'e %+,iui&ies

Over*%ppi" resis&ivi&- r%"es$i#e r%"e o) resis&ivi&- +%2es

'(%r%'&erie rou"# $%&er &%rresis&ivi&ies u"*ess s&%"#%r#ie#

A*so &(e %''ur%'- %"# reso*urespo"se #e're%ses $i&( i"'re%"# #e're%si" 'o"&r%s&s i" resi


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CASE STUDYApp*i'%&io" o) ver&i'%* e*e'&ri'%* sou"#i"s &o '(%r%'&erie

%/ui)er po&e"&i%* i" O&% Sou&( $es&er" Dieri%.

A. P. Aie,eo2(%i %"# O. A. O-e,%"$es&er" Dieri%

S'(*u+,erer e*e'&ro#e 'o"?ur%&io" $%s &o o,&%i" &(

sou"#i"s

A &o&%* o) &(ir&->?ve ver&i'%* e*e'&ri'%* sou"#i"s 9ES; $er'o"#u'&e# $i&(i" &(e s&u#- %re% so %s &o #e*i"e%&e &(su,sur)%'e *i&(o*oi'%* 'o"?ur%&io" #ep&( &o %/ui)er9s; %"%/ui)er '(%r%'&eris&i's.


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Fiure 15: %p s(o$i" &(e s&u#- %re% %"# *o'%&io"s o) ES poi"&s 9Aie


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Fiure 13: Represe"&%&ive o) &(e i&er%&e# ES 'urves s(o$i" &(e

i"verse +o#e*s o) &(e eoe*e'&ri'%* p%r%+e&ers 9%)&er Aie,eo2(%i %


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T%,*e 1: H-#r%u*i' p%r%+e&ers es&i+%&e# )ro+ i"verse +o#e* resis&ivi&p%r%+e&ers 9%)&er Aie,eo2(%i %"# O-e,%"


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CONCLUSION

T(is se+i"%r repor& (%s revie$e# '%se s&u#ies &(%& i**us&r%&e(o$ &(e ver&i'%* e*e'&ri'%* sou"#i" &e'("i/ue '%" ,e use# &o'(%r%'&erie %/ui)ers> i#e"&i)-i" p%r&s o) &(e %/ui)er $i&( ,es

po&e"&i%* -ie*#s es&i+%&e su,sur)%'e (-#ro*oi'%* proper&ieor s&%&e v%ri%,*es %"# +o"i&or su,sur)%'e pro'esse%sso'i%&e# $i&( "%&ur%* or e"i"eere# in-situ per&ur,%&io"s &&(e su,sur)%'e s-s&e+.

T(e eoe*e'&ri'%* p%r%+e&ers o,&%i"e# $ere use# &o es&i+%&&(e *o"i&u#i"%* 'o"#u'&%"'e %"# &r%"sverse resis&%"'e $(i'%re ree'&ive o) &(e (-#r%u*i' proper&ies o) &(e %/ui)er.

T(ese %"# +%"- o&(er s&u#ies (%ve "o$ #e+o"s&r%&e# &(%eoe*e'&ri'%* resis&ivi&- +e&(o# '%" su''ess)u**- ,e use# &%i" i"si(& %,ou& su,sur)%'e (-#ro*oi'%* pro'esses provi#i"pu& &(%& i+proves o$ %"# &r%"spor& pre#i'&io"s %"provi#e i")or+%&io" over sp%&i%* s'%*es &(%& %re re*ev%"& &o &(+%"%e+e"& o) $%&er resour'es %"# 'o"&%+i"%"& re+e#i%&io"


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THANK YOU

21. affiah raphael seminar

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