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aplikasi analisa cekungan
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APLIKASI BASIN ANALYSISAPLIKASI BASIN ANALYSIS
DALAM EKSPLORASI MIGASDALAM EKSPLORASI MIGAS
eddy purnomo / 620438jatinangor november 2006
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MATERI KULIAH
PENDAHULUAN
PRINSIP2 DASAR E!UN"AN SEDI#ENCekungan sedimen vs !ate te"toni"Mekanika !it#os$er
#E!ANIS#E PE#$EN%U!AN E!UN"AN SEDI#ENLit#os%eri" stret"#ing&!e'ure(trike s!i% de$ormation
%HE SEDI#EN%AR& $ASIN 'ILL&aktor %engontro!)e%ositiona! st*!e
E()LUSI E!UN"AN SEDI#EN(ubsiden"e #istor*T#erma! #istor*
ALIKA(I )ALAM I+)U(TRI E , MI-A(
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.A(I+ A+AL/(I(Geological Model
Evolusi stratigrafi dan struktural
Assessment petroleum play
Exploration Play concept : producible reservoir, petroleum charge
system, regional top seal, trapping mechanism, timing
hronostratigrafi!tectonostratigrafi model vs lithostratigrafi model
"#alitatif dan k#antitatif measurement
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CEKU+-A+ (E)IME+
$ithospheric stretching : rift basin, passive margin, post rift basin % sag
$ithospheric flexure : oceanic trench, foreland basin
&ransform ' (rench related basin : pull apart basin
)ack arc basin, fore arc basin, intra arc basin
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&AKTR E+-+TRL CEKU+-A+
&ektonik
Perubahan muka air laut % iklim
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(our"e Ro"k
)iological derived organic matter buried in sedimentary rock
*shale + carbonate
anoxic environment$ake, lacustrine, delta, shelf, enclosed marine
-ext process tergantung dari .enis kerogen, temperatur dan
#aktu
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Reservoir
$imestone, sandstone dan others
Porositas, permeabilitas + distribusi lateral ' vertical heterogen
/iagenetic processes : dissolution, dolomiti0ation, fracturing, rekristalisasi, sementasi + 10 gro#th
$st reservoir : environmental control 2 post sedimentation proc3
4st reservoir : provenance type + distance
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Ca% ro"k
Aspek penting namun sering diabaikan
5ine grain sediment + evaporite ' salt
4ealing capacity ' mathematical analysisGas leaks *diffusi lebih mudah drpd oil leaks
$itologi, ductility, tebal, distribusi lateral, kedalaman
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Tra%%ing Me"#anism
4truktural, stratigrafis, kombinasi + hydrodinamic
5aulted anticline vs against fault
"hronostratigrafis ' tektonostratigrafis model
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CEKU+-A+ (E)IME+
$ithospheric stretching : rift basin, passive margin, post rift basin % sag
$ithospheric flexure : oceanic trench, foreland basin
&ransform ' (rench related basin : pull apart basin
)ack arc basin, fore arc basin, intra arc basin
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RI&T .A(I+4ource rock : lake, lacustrine sediment : fresh #ater algae, bacteria
land plant material, Botryococcane biomarker : oil prone *#axy, lo#
sulphur content, G67 88
Predominantly clastic reservoir
4tratigraphic trap
9ntraformational shale ' post rift shale seuence
Early &ertiary ; ")9 + Meso0oic ; "&9
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A((I1E MAR-I+/eltaic source rock : fresh #ater algae, bacteria, land plant material
*abundant gas prone #% small amount of light crude
Predominantly clastic reservoir
4tratigraphic ' structural trap, rollover listric normal fault
9ntraformational shale, prodelta shale
Early ' $ate &ertiary
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(T RI&T (A- .A(I+
4helf ' open marine
arbonate ' calcareous shale source rock : salt #ater algae,
bacteria, land plant material
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CEA+IC TRE+CH 4ource rock : deep marine shale #% small amount of &6
Poor ! no reservoir
4truktur komplek
4hale seuence sangat dominan
Potensi migas kecil
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&RELA+) .A(I+4ource rock : land plant material, Pre ollision sediment !
limestone oil + gas prone
Predominantly clastic reservoir
4tructural trap, rollover imbricated thrust fault
9ntraformational shale
Early ' $ate &ertiary *=agros folded belt
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?
?
&m4 .iak
&m4 oo#
io!it
?
Tiaka &ie!d)onggi &ie!d
(E
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(TRIKE (LI RELATE) .A(I+ 5ULL AART .A(I+ 4ource rock *lake ' lacustrine : fresh #ater algae, bacteria,
land plant material *abundant oil + gas prone
Predominantly clastic reservoir
4tratigraphic ' structural trap, #rench related trap
9ntraformational shale, prodelta shale
Early ' $ate &ertiary *6mbilin basin
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.ACK ARC .A(I+5ailed rift basin *Aulacogen
4ource rock *lake ' lacustrine : fresh #ater algae, bacteria,
land plant material oil + gas prone
arbonate ! clastic reservoir
4tratigraphic ' structural trap
9ntraformational shale, regional top seal
Early &ertiary ' 1uarternary *")9 basin
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4amuel + Gultom, >?@
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4amuel and Gultom *>?@
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(TRIKE (LI RELATE) .A(I+ 5ULL AART .A(I+
7 I+TRA ARC .A(I+
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TERIMA KA(IH
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