Analisis Perbandingan Antara Respon Seismik Sintetik Pp Dan Ps Berdasarkan Pemodelan Substitusi Fluida Pada Sumur

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. ========================================================= 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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