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Scientific Contributions Oil and Gas
Published by LEMIGAS
ISSN : 20893361     EISSN : 25410520     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Energy
The Scientific Contributions for Oil and Gas is the official journal of the Testing Center for Oil and Gas LEMIGAS for the dissemination of information on research activities, technology engineering development and laboratory testing in the oil and gas field. Manuscripts in English are accepted from all in any institutions, college and industry oil and gas throughout the country and overseas.
Arjuna Subject : Energi (semua kategori) - Teknologi Bahan Bakar
Articles 619 Documents
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INFLUENCE OF THIOPENE ON THE CONVERSION OF METHYL-CYCLOPENTANE AND N.HEXANE TO BENZENE USING MONO-AND BI-METALLIC REFORMING CATALYSTS A.S. Nasution
Scientific Contributions Oil and Gas Vol 27 No 3 (2004)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.27.3.1058

Abstract

Parrafin and naphthene hydrocarbons are usually the major component in the naptha reforming feedstock. Thus the conversion of these hydrocarbon to high octane motor gasoline and aromatic hydrocarbon is one of the important reactions of the catalytic reforming process, (Montamal., 1965). And aromatization reaction is guided by both metal and acid sites of bi-functional reforming catalyst (Hobson 1973).
THE INFLUENCE OF ALCOHOL TYPE AND CONCENTRATION ON THE PHASE BEHAVIOR AND INTERFACIAL TENSION IN OIL-SURFACTANTCOSURFACTANT-BRINE MIXTURE SYSTEM Hadi Purnomo; Nuraini Nuraini; Tjuwati Makmur
Scientific Contributions Oil and Gas Vol 27 No 2 (2004)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.27.2.1059

Abstract

The number of mechanism is limited for reducing the entrapment of oil in the pore space of reservoir rock and for mobilizing that residual which remains entrapped, thereby improving the microscopic displacement efficiency of a petroleum recovery process. After primary recovery by flow powered by the energy stored in the compressed fluids of reservoir, and secondary recovery by injection-pump driven water flooding, residual oil is trapped by the capillary pressure developed by interfacial tension in curved menisci between oil and water in the pore space. Figure 1.1 illustrates the interplay of capillary and viscous forces in the water flooding process. Shown in the figure is water displacing oil. The important point is that residual oil is trapped in the pore space by interfacial tension. To improve micros- copic displacement efficiency is to reduce interfacial tension between oil and water. Surfactant is surface active agent chemical that has two types of properties; lypofob (like water) and hydrofob (like oil). The value of interfacial tension between oil and water is high, when surfactant is dissolved into water and contacts with oil, so that surfactant is not only soluble in the water, but also it is soluble in the oil. By addition of surfactant into the water and contact with oil can result in interfacial tension between oil and water from high (more less 20 - 30 dyne/cm) to lower interfacial tension (10-2 dyne/cm). To change the lower interfacial tension to the lowest interfacial tension conditions (10-4dyne/cm), cosurfactant in oil-surfactant-brine mixture is used. Alcohols are widely used in micellar surfactant systems for enhanced petroleum recovery and are variously called cosurfactant or cosolvent. In general, alcohols modify the physico- chemical properties in ways that are important to the design of surfactant-based process for improving petroleum recovery. This research is focused on alcohol effects on oil-surfactant-brine phase behavior and interfacial tension of oil-surfactant-brine system.
DATA PREPARATION FOR AN ACCURATE ENHANCED OIL RECOVERY LABORATORY TEST BY USING SURFACTANT FLOODING METHOD Tjuwati Makmur
Scientific Contributions Oil and Gas Vol 28 No 2 (2005)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.28.2.1060

Abstract

In preparation of the study, x core plugs are drilled. Determination of basic parameter and identification of core plug sample are carried out following the API-RP 40. For example, the tests of physical properties, i.e. grain density (gr/cc), weight, grain volume (cc), pore volume (cc), posority (%), and air permeability (Ka.mD).
AN EMPIRICAL APPROACH ON LABOUR COSTS FOR OIL FIELD DEVELOPMENT PLANNING Herlan Adim
Scientific Contributions Oil and Gas Vol 25 No 1 (2002)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.25.1.1061

Abstract

In planning the development of an oil reservoir, the guidelines should be the annual production targets for a five-year period and for the year when development is scheduled to reach its peak. The production targets must be coordinated with the planned development of the oil industry as a whole. The planned oil production targets for the industry as a whole must be apportioned between different oil-bearing areas and different fields within an area. The development plan for each field should ensure the most efficient production, i.e, at the lowest possible cost. The recommended procedure is first to have a wide grid of wells so as to get a better idea of the reservoir and to finalise the spacing of the planned wells.
LEMIGAS BIOSTRATIGRAPHIC DATA BANK CONSTRUCTION Eko Budi Lelono
Scientific Contributions Oil and Gas Vol 25 No 1 (2002)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.25.1.1062

Abstract

In accordance with the tasks and functions of LEMIGAS, the Stratigraphy Group of Exploration Division has been constructing a data bank of biostratigraphy which covers the whole areas of Indonesia. This project is financially supported by LEMIGAS and it has been started since 1997. The objective of this project is to collect biostratigraphic data across the Indonesian region. The data are differentiated into two types. The first type is raw data which were extracted from rock samples after laboratory preparation. The second type is data provided from the existing biostratigraphic charts. In addition, data generally derived from wells. Data obtained from the charts need to be re-analysed in order to gain accurate stratigraphic interpretation. The data bank is built by using a computer software called StrataBugs. This software was selected because it provides facilities to perform many types of biostratigraphic diagram which support different analyses. It is also compatible with other biostratigraphic software. The first five years were concentrated on western Indonesia. There are 285 data collected from various areas which consist of foraminifera, nannoplankton and palynology. Apparently, the number of data tends to increase each year.The data bank can be used for either scientific aims or managerial purposes. For scientific aims, these data are temporarily used for reconstructing biozones and palaeoenvironment. However, many analyses can be established by referring to these data such as palaeoclimate, sea level changes and palaeogeography. In fact, two papers have been published based on these data. For managerial purposes, these data may be used to evaluate the performance of Stratigraphy Group relating to commercial works because most data were supplied from service work. These data also support the management to prepare an appropriate strategy to achieve reasonable performance. 
MATHEMATICAL MODEL ON THE FEASIBILITY OF NGV FILLING STATION CONSTRUCTION FOR PUBLIC TRANSPORT FUEL SUBSTITUTION IN JABOTABEK AREA Yusep K Caryana
Scientific Contributions Oil and Gas Vol 25 No 1 (2002)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.25.1.1063

Abstract

A key factor that should be taken into account in implementing public transport fuel substitution in Jabotabek area is the feasibility of NGV (new) filling stations construction. This needs to be considered in order that the supply of NGV in the area can be secured. Otherwise, additional demand of NGV (CNG and/ or LPG) for the substitution will not be met. A mathematical model of the feasibility of NGV filling station construction has been developed as a rule of thumb of the construction. The model is then applied to select the location of NGV filling station based on public transport population in Jabotabek area.
EFFECT OF MOBILE PHASE COMPOSITION ON THE SELECTIVITY OF CHROMATOGRAPHY COLUMNS WHICH USE POLYPYRROLE AS THE STATIONARY PHASE Hawick Chriswanto
Scientific Contributions Oil and Gas Vol 25 No 1 (2002)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.25.1.1064

Abstract

Chromatography columns packed with polymeric stationary phase have been prepared. The packing materials were prepared by depositing polypyrrole chloride or polypyrrole dodecylsulfate onto silica particles. The deposition was accomplished by chemical oxidative polymerisation. Chromatographic selectivity of the columns was examined under reversed-phase condition using pairs of test compounds with known functionalities as the probes. The results showed that if hydrophobic interactions were dominant, the selectivity increased with decreasing in organic fraction in the mobile phase, and vise versa.
UPSCALING PERMEABILITY Septi Anggraeni; Harry Hardiman
Scientific Contributions Oil and Gas Vol 25 No 2 (2002)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.25.2.1065

Abstract

In reservoir simulation, the engineer needs a set of permeability values estimated on grid block which are as representative as possible of the true value. However. the sample data is limited to small scale measurement relative to the scale of reservoir simulation. Therefore. we need to upscale the permeability data measurement by averaging permeability on volumes. Prior to obtain the appropriate averaging method, an upscaling experiment was performed. The averaging method at the plug scale can be specified from the probe data and the Hassler cube data, by comparison.
THE ORIGIN OF DOLOMITE IN EARLY CAMBRIANCARBONATES OF YORKE PENINSULA, WESTERN MARGIN OF STANSBURY BASIN, SOUTH AUSTRALIA Maximon Shah Arifin
Scientific Contributions Oil and Gas Vol 25 No 2 (2002)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.25.2.1066

Abstract

The Early Cambrian carbonate sequence in Yorke Peninsula consists of tidal flat lithologies in the lower part (Kulpara Fomation) and lagoonal lithologies with sporadic bioherms (Koolywurtie Member) in the upper part. Dolomitization have been recorded in those carbonates mainly of replacive nature, only small amounts are void-fill cement. Petrographic and stable isotopic analysis have supported the conclusion that dolomitization of the Early Cambrian carbonates in Yorke Peninsula was an ongoing process by hypersaline water followed by a mayor episode of recrystallization during shallow burial diagenesis, where enormous quantity of magnesium required for regional dolomitization is supplied by sea water. The geochemical and tectural modification of the dolomites are the result of a later stage recrystallization event, in shallow burial diagenetic environment by surfacederived meteoric 1 water.
MICROBIAL EOR STUDY TO IMPROVE SWEEP EFFICIENCY IN CALTEX FIELDS PHASE 1 – NUTRIENT SELECTION Sri Kadarwati; M. Udiharto; Noegroho Hadi Hs; Joseph P. Brinkman; Bangun Yulianto
Scientific Contributions Oil and Gas Vol 25 No 2 (2002)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.25.2.1067

Abstract

The objective of this research is to find a cost effective nutrient that will stimulate the growth of in-situ microbes in Caltex Pacific Indonesia (CPI) oil fields to create sufficient biological products to plug high-permeability reservoir thief zones. If successful, injection fluids may be diverted into unswept regions of the reservoir, increasing the sweep efficiency und extending the production life of watered- out oil fields. This paper describes how a wide range of nutrients were researched and tested in the laboratory to achieve the objective. The primary findings of this study show that several primary nutrients were successful at creating bioproducts at high temperature, low salinity, reservoir conditions, and that molasses may be the most cost effective nutrient for all three CPI waterflooded reservoirs tested: Balam South, Bangko, and Minas fields. As a result of this work, laboratory studies were started to see to if the microbial growth created in laboratory test tubes can be recreated within reservoir core plugs to achieve sufficient permeability reduction to justify field trial (s). The core flood process and techniques will be presented in a separate paper.

Page 37 of 62 | Total Record : 619

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