Abstract
Permeability is a key to determine the quality of reservoir. Reservoir quality can be dened as the ratio between permeability and porosity of a rock. Besides, permeability is not in uenced by porosity solely, there are otherfactors which aect the value of the permeability of a rock. One of them is aected by the pore structure, which includes turtuosity, surface area, and grain size. To determine how much these factors aect the permeability of a rock, it takes an elastic parameters that can be an indicator of the quality reservoir e.g pore space stiness and critical porosity.Primary data such as petrophysics, XRD data, and permeability are used as input data to determine the quality of reservoir. By using Zimmerman's equation and Nur's model, we will get the value of pore space stiness and critical porosity at each point. The combination of rock quality equation derived from Kozeny Carman's with elastic parameters as indicators produces qualitative rock quality identification. Results of this study is able to show that the pore space stiffness and critical porosity can represent turtuosity, surface area, and grain size of a rock which lead to the determination of rock quality. The method proposed in the present study demonstrated an excellence reservoir quality prediction based on the relation between petrophysical parameters with elastic parameters.
Highlights
Permeability is a key to determine the quality of reservoir
The method proposed in the present study demonstrated an excellence reservoir quality prediction based on the relation between petrophysical parameters with elastic parameters
Rock Type Based Permeability Prediction Using Routine and Special Core Analysis Data
Summary
Mayoritas sumber energi di Indonesia masih bergantung pada bahan bakar fosil, tetapi kenyataannya bahan bakar fosil merupakan sumber daya yang tidak bisa diperbarui dan produksinya terus menurun. Batupasir tight merupakan salah satu jenis reservoir yang jarang ditargetkan sebagai reservoir utama. Hal ini dikarenakan batupasir tight memiliki nilai porositas rendah akibat sudah mengalami proses kompaksi. Dalam Pride (2005) faktor konsolidasi (α) digunakan sebagai salah satu parameter yang menggambarkan derajat kompaksi suatu batuan. Faktor ini tentu akan mempengaruhi kualitas dari suatu batuan. Properti fisis batuan lainnya yang mempengaruhi kualitas batuan adalah permeabilitas dan porositas. Semakin tinggi permeabilitas dan porositas maka kualitas reservoir akan semakin bagus. Suatu batuan dengan porositas tinggi belum tentu permeabilitasnya tinggi, tergantung bentuk dan ukuran butir. Penelitian kali ini dilakukan untuk melihat bagaimana hubungan antara antara permeabilitas dan porositas dengan parameter elastis yang diturunkan dari metode fisika batc 2018 Himpunan Ahli Geofisika Indonesia. 2 1.5 1.15 uan seperti misalnya pore space stiffness dan critical porosity dari reservoir batupasir tight
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