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All Journal Scientific Contribution Oil and Gas Lembaran Publikasi Minyak dan Gas Bumi
Kristanto, Dedy
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Environmental Science

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PENENTUAN SWELLING FACTOR DAN TEKANAN TERCAMPUR MINIMUM UNTUK PENERAPAN INJEKSI GAS KARBONDIOKSIDA DI LAPANGAN MINYAK Kristanto, Dedy; ., Hariyadi; ., Wibowo; Paradhita, Windyanesha
Lembaran publikasi minyak dan gas bumi Vol 53, No 3 (2019)
Publisher : PPPTMGB "LEMIGAS"

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (796.663 KB) | DOI: 10.29017/LPMGB.53.3.435

Abstract

Pengembangan (swelling) minyak dan tekanan tercampur minimum (TTM) merupakan dua faktor yang penting dari mekanisme pendesakan gas karbondioksida (CO2 ) yang terjadi di reservoir untuk penerapan injeksi CO2 di lapangan dalam upaya meningkatkan perolehan minyak tahap lanjut. Dalam paper ini penentuan swelling factor dilakukan menggunakan PVT cell, dimana fluida rekombinasi diinjeksikan dan dikondisikan pada temperatur reservoir. Sedangkan penentuan TTM antara sampel minyak dengan gas CO2 dilakukan menggunakan tiga cara, yaitu persamaan empiris, secara korelasi dan percobaan laboratorium menggunakan Slimtube. Berdasarkan hasil analisa swelling test selama proses injeksi gas CO2 sampai 46,82% mol, tekanan gelembung meningkat secara bertahap dari 410 psig sampai 2200 psig dan faktor swelling meningkat dari 1.0 sampai 1.442. Penentuan TTM menggunakan persamaan empiris (2807 Psig) dan korelasi Holm Yosendal (2750 Psig) adalah yang paling mendekati dengan hasil penentuan dari analisa laboratorium (2800 Psig). Didasarkan pada besarnya tekanan rekah formasi di Lapisan F sebesar 2200 Psig dan TTM sebesar 2800 Psig, maka dalam penerapannya di lapangan injeksi gas CO2 hanya dapat dilakukan secara pendesakan tak tercampur.
Prediction Of Two-Phase Relative Permeability In Porqus Media Based On Network Modeling Of Lattice Gas Automata Kristanto, Dedy; Awang, Mariyamni
Scientific Contributions Oil and Gas Vol 27, No 1 (2004)
Publisher : PPPTMGB "LEMIGAS"

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.27.1.874

Abstract

The displacement of one fluid by another is controlled by the geometry of the pore space. The relative hydrodynamic conductance of each fluid at a given saturation is the relative permeability, while the pressure difference between the phases is the capillary pressure. These two functions determine the macroscopic fluid flow behavior in hydrocarbon reservoir over the scale of centimeters to kilometers.At the pore seale fluids reside in intergranular space of typical sedimentary rocks. The rock type and fluid properties are likely to change drastically through the reservoir, the only sample of rock come from drilling wells, which represents a tiny fraction of the total volume in a reservoir. Furthermore, relative permeability measurements on these samples are difficult and time consuming. To quantify and control uncertainty in recovery estimations, it is necessary to have some theoretical understanding of transport properties. Such understanding would enable us to predict the sensitivity of relative permeability to geological factors such rosity, and the nature of the fluids. This work is a pre- liminary step in this direction. A more important result from this work is that we are now able to quantify the change in the relative permeability to those geological factors.In this paper a pore structure and displacements mechanisms to model two-phase flow in porous media were constructed using lattice gas automata. The void space of the media is represented as a network of large spaces (pores) connected by narrower throats. The aggregation of cell pore volumes is used to calculate the porosity of the network and the fluid saturation when different cells are occupied by different fluids. By judicious choices for the distribution of pore and throat sizes of the network it is possible to predict relative permeability. For predicting the absolute and relative permeability, it is assumed that the viscous pressure drops occur across the throats.
Co-Authors Awang, Mariyamni Hariyadi . Paradhita, Windyanesha Wibowo ., Wibowo