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All Journal Medicina Physics Student Journal
Putu Ayu Saraswati
Bagian/ SMF Ilmu Bedah Fakultas Kedokteran Udayana/ Rumah Sakit Umum Pusat Sanglah Denpasar Bali
Medicine & Pharmacology Physics

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Hydrocarbon Identification through Acoustic Impedance and Elastic Impedance Cross-Correlation using Constrained Sparse Spike Inversion Method Saraswati, Putu Ayu; Susilo, Adi; Hosni, Farid
Physics Student Journal Vol 2, No 1 (2014)
Publisher : Department of Physics - Faculty of Science

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Abstract

Among other interpretation methods used in oil and gas industries, seismic inversion has become a method widely practiced to get better understanding on the subsurface condition. By combining seismic and well log data and applying certain workflow, information regarding hydrocarbon distribution presented in the form of impedance section. Using constrained sparse spike inversion, a generated low frequency model was use as input for inversion process to obtain acoustic impedance and elastic impedance variation based on seismic and low frequency data from well log data. To enhance the difference between sand and shale presence, the gamma ray distribution between acoustic impedance (AI) and elastic impedance (EI) generated from the inversion process are cross-correlated. Based on the cross plot, gas sand bodies detected in the area was mapped. Keywords: inversion, acoustic impedance, elastic impedance
Indentifikasi Sebaran Hidrokarbon Pada Reservoir Batu Pasir Dengan Inversi AI Dan SI Menggunakan Metode Stokastik gustiansyah, rizky; Susilo, Adi; Saraswati, Putu Ayu
Physics Student Journal Vol 2, No 1 (2014)
Publisher : Department of Physics - Faculty of Science

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Abstract

Metode inversi merupakan salah satu metode andalan dalam identifikasi sebaran hidrokarbon. Metode seismic inversi menghasilkan respon yang tidak unik dan dapat menghasilkan respon yang sangat beragam sehingga perlu dianalisis dengan metode statistik. Metode inversi secara statistic dilakukan dengan metode stokastik yang menggunakan latar belakang model hasil inversi simultan, mampu memberikan hasil dengan tingkat akurasi dan korelasi tinggi. Hasil inversi stokastik yang dilakukan parameter fisis Accoustic Impedance (AI) dan Shear Impedance (SI) menghasilkan korelasi terhadap data sumur hingga sebesar 0.94 untuk AI dan 0.84 untuk SI. Sebaran hidrokarbon dianalisis berdasarkan kombinasi hasil inversi stokastik AI dan SI dengan kebolehjadian 90%. Nilai AI rendah (5000 - 6000 g/cc m/s) dan SI rendah (2500 - 4000 g/cc m/s) berasosiasi dengan keberadaan hidrokarbon dalam reservoir dengan porositas antara 0.25-0.35. Hidrokarbon Gas 90% tersebar di sekitar sumur NORTON 5, dan Hidrokarbon minyak 85% tersebar disekitar sumur NORTON 1.
Co-Authors Adi Susilo Farid Hosni I Gde Raka Widiana I Nyoman Semadi rizky gustiansyah