6. Stratigraphic Interpretation_Genap_2014-2015_TP.pptx

EXPLORATION GEOPHY EXPLORATION GEOPHYSICS SICS Seismic Stratigraphic Stratigraphic Interpretation

"rogram St#di Teknik "ermin$akan %ak#&tas Tekno&ogi 'e(#mian dan Energi  )ni*ersitas Trisakti 

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Dr. Ir. Eko Widianto, MT  Semester Genap_2014 Genap_2014  201!

L0CTUR0 $*T0RI*L( 1 & )  . / 5 7 1 11

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INTRODUCTION: Defniton, Level Peroleum Investgaton, Role o G eo!"si#al $e!o%s

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'un%amenal 'un%amenal o (eismi# $e!o%

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(eismi# *#+uisiton

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(eismi# Pro#essing

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(eismi# (ru#ural Inerreaton

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(eismi# (ratgra!i# Inerreaton

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(eismi# Inerreaton 0er#ise 2&34

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Revie6 o Gravi" $e!o%

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Para%igm (!i8 in Gravi" Daa Utli9aton

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Gravi" %aa anal"sis or Oil an% Gas 0loraton

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Gravi" Daa anal"sis or Reservoir $onioring

Summary •

 (e+uen#e sratgra!": sratgra!": an inegrae% inegrae% rame6or; rame6or; < or eroleum s"sems anal"sis an% < re%i#tve mo%els or rose# generaton •

 (e+uen#es are #onrolle% =" a #omle inera#ton o e#onism, eusas", se%imen sul" an% #limae

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 (everal aroa#!es eis, %i>ering mainl" in erms o rin#ial =oun%ing sura#es? one or ano!er ma" ma" =e =es or a art#ular =asin or se@ng

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 'rom a ABes Pra#t#es san%oin, 6e re#ommen% using !e mos reasona=le an% ra#t#al aroa#!

Stratigraphic Analysis

Controls on Stratigraphic Architecture

Shoreline Movements

 Alternative Packages

Type-1 Exxonian Sequence

Highstand

Transgressive Eustasy

F

R 

Lowstand Wedge Lowstand Fan

Systems Tracts

Scale of Stratigraphic Correlation •

sing !utcrops or Cores  –

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60

+attern correlation of log #ar%ers nits are #eters thic% 

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Seis#ic correlation of be$sets an$ larger units nits are tens to hun$re$s of #eters thic% 

 "ery Local

40 20 0

Well A

  n   o    i    t   u    l   o   s   e    &

sing Seis#ic ,ata  –

cm

 "isually correlate la#inae an$ be$s nits are centi#eters thic% 

sing Well Logs  –

'igh

Well B

Well C 12  9  6 3  0 meters

   t   n   e    t   x    E    l   a   e   r    A

meters 300 200 100 0

Lo(

)asin*  (i$e

-he S-&E./-'S of Seis#ic ,ata •

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/oo$ areal coerage  Able to i#age #aor $epositional units  Able to i$entify potential source2 reseroir2 an$ seal units +roi$es a stratigraphic fra#e(or% (ithin (hich other $ata can be un$erstoo$  –

Well $ata

 –

)asin fill history

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'C syste#s

Vail et al., 1977a

AAPG©1977 reprinted with permission of the AAPG whose permission is reqired for frther se.

-he WEA3.ESSES of Seis#ic ,ata •

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Li#ite$ ertical an$ lateral resolution can5t resole 6s#all7 features Stratigraphic interpretation is li#ite$ by the 8uality of the seis#ic $ata9i#aging Seis#ic responses are non*uni8ue – e:g:2 lo( a#plitu$e coul$ be a #assie san$ or a thic% shale ;n ne( areas2 (e often hae to