Analisa Persebaran Reservoar Batupasir Lapangan “Dka” Cekungan Barito Dengan Metode Amplitude-Variance-Frequency (Avf) Analysis.

Andanu, Dimas Kusuma (2018) Analisa Persebaran Reservoar Batupasir Lapangan “Dka” Cekungan Barito Dengan Metode Amplitude-Variance-Frequency (Avf) Analysis. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Reservoir batupasir lapangan DKA sulit dianalisa melalui parameter impedansi akustik (AI) karena kurang sensitif saat digunakan sebagai acuan koefisien refleksi. Menurut Ren Haitao dkk (2009), spektrum frekuensi dapat digunakan sebagai pengganti amplitudo parameter AI, dan mampu mencitrakan reflektifitas berdasarkan fenomena atenuasi overburden . Metode AVF (Amplitude Variance Frequency) mampu memisahkan reservoir batupasir terhadap litologi batuan lain dan mengkategorikan fluida reservoir secara kualitatif. Dalam Tugas Akhir ini, spektrum frekuensi hasil ekstraksi dari metode spectral decomposition CWT (Continous Wavelet Transform) data seismik lapangan DKA dianalisa secara terintegrasi dengan AVF Analysis. Kemudian penampang atribut AVF diciptakan untuk memperoleh peta estmasi persebaran batupasir pada lapangan DKA, hasilnya berupa persebaran batupasir dan intepretasi facies pada zona E dengan lingkungan pengendapan estuarine tidal dominated dan zona C dengan lingkungan pengendapan fluvial meandering. Ditemukan zona E merupakan reservoir batupasir tersaturasi fluida hidrokarbon dan zona C merupakan reservoir air di sumur DKA-09 dengan nilai AVF intercept*gradient masing-masing berada pada rentang -2,39e+10 sampai -3e+11 di zona E, kemudian -6,809e+10 hingga -3e+11 di zona C.============================================================================================ The fluid saturated sandstone reservoir is difficult to analyze through an acoustic impedance parameter (AI) because it is less sensitive when used as a reference reflection coefficient. According to Ren Haitao et al (2009), the frequency spectrum as a substitute for the amplitude of AI parameters, can be used to image reflectivity based on the phenomenon of overburden attenuation. The AVF method is capable of separating sandstone reservoirs against other rock lithologies and categorizing reservoir fluids. In this Final Project, the frequency spectrum of extraction using CWT spectral decomposition method from DKA field seismic data is analyzed in an integrated manner with AVF Analysis. Slicing attribute of AVF was then performed to obtain a map of sandstone dispersion estmation on the DKA field, the result of the dispersion of sandstone distribution on Zone E with estuarine tidal dominated and Zone C deposition environments with fluvial meandering precipitation environment. Found that zone E is reservoir sand saturated hydrocarbon fluid and zone C represents water reservoir at DKA-09 well, with AVF value of intercept*gradient each located in range -2,39e + 10 to -3e + 11 in zone E, then -6,809 e + 10 to -3e + 11 in zone C.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Impedansi Akustik, metode AVF, batupasir.
Subjects: Q Science > QE Geology > QE538.5 Seismic waves. Elastic waves
Q Science > QE Geology > QE601 Geology, Structural
Divisions: Faculty of Civil Engineering and Planning > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User: Dimas Kusuma Andanu
Date Deposited: 18 Jul 2021 21:14
Last Modified: 18 Jul 2021 21:14
URI: https://repository.its.ac.id/id/eprint/56899

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