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All Journal Jurnal Geocelebes
Hamriani Ryka
Departemen Teknik Geologi, STT-Migas Balikpapan
Earth & Planetary Sciences

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PEMODELAN BAWAH PERMUKAAN BANTAR KARET, JAWA BARAT MENGGUNAKAN METODE GRAVITASI Jamaluddin Jamaluddin; Maria Maria; Hamriani Ryka; Rohima Sera Afifah
JURNAL GEOCELEBES Vol. 3 No. 2: October 2019
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/geocelebes.v3i2.6689

Abstract

Gravity method is one of the geophysical methods that is often used to obtain information about the subsurface through differences density of the rocks around it. Gravity anomaly data used in this study is primary data that has been processed data. Data processing is obtained by reducing gravity observation data until complete bouguer anomaly values. The results of the interpretation of the gravity anomaly show that the types of rocks in subsurface of the study area are peridotite, tuff, riolite and basalt. The rock with the highest density is peridotite with a density value of 3.15 gr/cm3. This is due to the intrusion process to forming peridotite and there are two zones boundaries which have very significant density differences.
SIMULASI DISTRIBUSI TEKANAN INJEKSI PADA RESERVOIR MENGGUNAKAN METODE FINITE DIFFERENCE Jamaluddin Jamaluddin; Nuruddin Kafy El-Ridlo; Hamriani Ryka; Maria Maria
JURNAL GEOCELEBES Vol. 4 No. 1: April 2020
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/geocelebes.v4i1.7439

Abstract

The modeling of reservoir injection pressure distribution is very important to perceive reservoir management, especially in estimating the pushing mechanism. The modeling of reservoir injection pressure distribution was carried out by applying the analytic equation of fluid flow to the porous media of Darcy's law and transformed to a finite difference numerical equation which then used Neumann boundary conditions. The parameters used in the modeling were: permeability, average layer thickness, porosity, acceleration of gravity, viscosity, and area’s width. Based on the results of modeling, the injection pressure distribution area decreased as injection pressure rate increased. This decrease occurred due to an imbalance between the volume of reservoir fluid produced by the volume of water from the aquifer that replaced the reservoir, caused emptying. From the results of the modeling the amount of oil production, obtained from the remaining oil reserves to the initial oil acquisition in the reservoir after the process of pressure maintenance, could be found.
Co-Authors Jamaluddin Jamaluddin Maria Maria Maria Maria Nuruddin Kafy El-Ridlo Rohima Sera Afifah