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Juventa, Juventa
Universitas Jambi
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Journal : Jurnal Geosaintek

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UJI KERENTANAN BANGUNAN RUSUNAWA BERDASARKAN HVSR (HORIZONTAL TO SPECTRAL RATIO) DAN FSR (FLOOR SPECTRAL RATIO) Larasati, Nurrani; Farid, Faizar; Juventa, Juventa
Jurnal Geosaintek Vol. 8 No. 1 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

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Abstract

Lokasi penelitian terletak di gedung Rusunawa (asrama mahasiswa) yang termasuk ke dalam wilayah administratif Universitas Jambi. Penelitian ini dilakukan untuk mengetahui nilai frekuensi alami tanah (ft), nilai frekuensi alami bangunan (fb), nilai amplitudo (A0), nilai resonansi (%) dan nilai indeks kerentanan bangunan (K) berdasarkan HVSR (Horizontal to Vertikal Spectral Ratio) dan FSR (Floor Spectral Ratio). Secara geologi, gedung Rusunawa berada pada Formasi Muaraenim yang tersusun batupasir tufan dan batulempung tufan, batupasir kuarsa dan batulempung kuarsa, sisipan batubara dan oksida besi. Data penelitian diperoleh dari 36 titik perekaman data mikrotremor. Hasil nilai resonansi pada komponen East – West (EW) dengan rata-rata 330.296%, sedangkan komponen North – South (NS) dengan nilai rata-rata 249.305%. Nilai tersebut memiliki resonansi > 25% dengan klasifikasi rendah berdasarkan klasifikasi kerentanan resonansi. Hasil nilai indeks kerentanan bangunan (K) gedung Rusunawa Universitas Jambi komponen East – West (EW) dengan rata-rata 32.86813 cm/s2, komponen North – South (NS) dengan rata-rata 59.59811 cm/s2 memiliki nilai indeks kerentanan bangunan yang rendah. Nilai indeks kerentanan dibawah dari 1/100 gedung Rusunawa aman terhadap kerusakan.
KARAKTERISASI RESERVOIR KARBONAT MENGGUNAKAN INVERSI IMPEDANSI AKUSTIK BLOK ‘X’, FORMASI TUBAN, CEKUNGAN JAWA TIMUR Juventa, Juventa; Bobbybuana, Ahmad Fakhri; MZ, Nasri; Herawan, Fitriyanda; Fatahillah, Ahmad Dzikra
Jurnal Geosaintek Vol. 8 No. 1 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

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Abstract

Carbonate reservoirs are usually difficult to map and identify in seismic sections due to their complex structure and diagenetic material with high heterogeneity. The East Java Basin is a perfect example of these complex carbonate structures with excellent hydrocarbon accumulation. In order to obtain a better characterization of the carbonate reservoir in this basin, acoustic impedance inversion is performed in here. Acoustic impedance is a product of seismic P wave velocity and density, where velocity and density are properties commonly used to describe rocks in a reservoir. Based on the sensitivity analysis results, the sensitive parameters to describe the reservoir are acoustic impedance, porosity, sonic, and density. Inversion results showed the range of acoustic impedance values in the Tuban Formation between 23000 – 50000 (ft/s).(g/cc) and porosity transformation results showed a value range of 8 – 22%. Depth structure map, acoustic impedance and porosity section slices showed the distribution pattern of reservoir zones lying in the West - Southwest direction with high structural elevations or located on the top structure reservoir carbonate at a depth of 2500 meters below the surface
Co-Authors A. D. Prabawa Adhitya Eko Bagus Sasongko Ahmad Dzikra Fatahillah Ahmad Fakhri Bobbybuana Amin, Sarwo Sucitra Annura Rizky, Shazkya Arif Nurrahman Bobbybuana, Ahmad Fakhri Bochori Bochori Deliana Siregar, Anggi Denny Prabawa, Aditya Edwin Permana Erna Y Hutasoit Faizar Farid Fatahillah, Ahmad Dzikra Fatkhan Fatkhan Fitri Ramadhani, Amelia Fitriyanda Herawan Gindo Tampubolon Hari Wiki Utama Herawan, Fitriyanda Hidaya, Rizky ira kusuma dewi kusuma dewi, ira Larasati, Nurrani Lefdiana, Aura Lenny Marlinda M Arief Yamin M. T. Toha Martin Horas Parulian Butar Butar Mz, Nasri Nadea Arie Saragih Nasri M Z Nasri MZ Novianda, Cici Nuklirullah, Nuklirullah Nurrani Larasati Paziati Andini rarasati, niken Rendi Gustian Resta, Ichy Lucya Rian Rian Rikaldo Pratama Ritonga, D.M. Magdalena Ritonga, D.M. Magdalene Sarwo Sucitra Amin Satria, Arie Siregar, Anggi Deliana Situmorang, Johannes Kurni Bintang Awan Situmorang, Salomo Suhban, Muhammad Wiratama, Jarot Yudhi Acnopha Yurismawan, Yurismawan