Lizai, Nova (2016) Analisis Perbandingan Antara Respon Seismik Sintetik Pp Dan Ps Berdasarkan Pemodelan Substitusi Fluida Pada Sumur. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian yang bertujuan untuk menganalisa perbandingan sintetik PP dan PS
berdasarkan pemodelan sumur. Penelitian ini mencakup pemodelan data
sumur dan pembuatan seismik sintetik gather PP dan PS. Pemodelan data
sumur yang dilakukan adalah pemodelan substitusi fluida (100% air, minyak
dan gas) dengan teori Gassman dan proses editing log. Pembuatan seismik
sintetik gather PP dan PS berdasarkan prinsip gelombang elastik dengan
memanfaatkan komponen vertikal dan horizontal. Pemodelan sintetik kedepan
menggunakan prinsip ray tracing dengan jumlah offset 101 dengan range offset
0-4000m. Penelitian ini menunjukkan bahwa hasil dari substitusi fluida sangat
mempengaruhi kecepatan gelombang P dan densitas, sedangkan perubahan
terhadap kecepatan gelombang S tidak terlalu signifikan. Reservoir merupakan
sand gas sehingga nilai kecepatan gelombang P ketika disubstitusi gas lebih
besar daripada minyak. Hasil dari sintetik gather PP dan PS adalah perbedaan
time position. Efek substitusi fluida (fluida pengisi pori batuan) terhadap
respon seismik berupa time delay (efek gas) akibat adanya penurunan
kecepatan gelombang P.
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The objective of this study is to analyze the seismic modeling response in PP
and PS synthetic gather based on well fluid substitution modeling. The
methodology consists of well based modeling and seismic synthetic gather PP
and PS generation. Well based modeling was performed in gas, oil and brine
case by using Gassman fluid substitution seismic modeling and log editing.
Seismic synthetic gather PP and PS generation use the elastic wave theory with
the consideration of horizontal and vertical component. The synthetic forward
modeling using ray tracing with number of offset 101 and offset range 0-
4000m. The result of fluid substitution modeling is slightly affecting the
changing in compressional wave velocity and density and not significantly
changing the shear wave velocity. The reservoir estimated to be gas sand,
which is affect the compressional velocities for gas sand are faster than oil in
the same sand. The time position differences observed between synthetic gather
PP and PS. Pore fluid filling affect the seismic response in time delay (gas
effect) because of the decreasing compressional velocity.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSGf 622.159 2 Lin a |
| Uncontrolled Keywords: | Substitusi Fluida, Sintetik Gather PS, Gelombang Elastik, Time position |
| Subjects: | G Geography. Anthropology. Recreation > G Geography (General) > G109.5 Global Positioning System G Geography. Anthropology. Recreation > GE Environmental Sciences |
| Divisions: | Faculty of Civil Engineering and Planning > Geophysics Engineering > 33201-(S1) Undergraduate Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 18 Oct 2019 09:32 |
| Last Modified: | 18 Oct 2019 09:32 |
| URI: | http://repository.its.ac.id/id/eprint/71276 |
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