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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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HYDROCRAKING OF HEAVY DISTILLATE INTO CLEAN DIESEL OIL USING Ni-Mo/Al2O3 CATALYST A.S. Nasution; E. Jasjfi
Scientific Contributions Oil and Gas Vol 23 No 1 (2000)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.23.1.1078

Abstract

Diesel oil is high pollution fuel and the quality of this fuel must he improved to obtain clean diesel oil Crude oil production and its quality tend to decrease. Light fuel oil demand rate is higher than that of residual fuel. Diesel oil produced in the refineries generally consists of predominantly straight-run diesel oil: however, compounds such as thermally and catalytically cracked diesel oils are sometimes included. The quality of straight-run diesel oil, such as hydrocarbon types and sulfur content, will in general reflect the nature of crude oil. Cracked stocks either thermal or catalytic cracked diesel oils, contain higher percentage of aromatic, olefin and sulfur contents and these cracked diesel products must be hydrogenated prior to rounting to final products. The passage of the Clean Air Act Amendment of 1990 in the U.S.A has forced American refineries to install new facilities to comply with stricter specifications for fuels such as gasoline and diesel oil. Hydrocracking processes are a combination of desulfurization and conversion developed primary to process feeds having a high content of unsaturated hydrocarbons (olefin and polycyclic aromatics) and non-hydrocarbon compounds (sulfur and nitrogen compounds) with a bifunctional catalyst. A variety of bifunctional catalysts and processing designs may be used commercially depending on the feedstock used and desired products. Influence of both feedstock compositions (paraffinic and non-paraffinic vacuum distillate, and wax) and the acidity of bifunctional catalysts on the performance of hydrocracked diesel oil products are discussed briefly in this paper. Low yield or selectivity of diesel oil products by high catalyst acidity, it is suggested that the higher secondary splitting has taken place in converting cracked products into large amounts of low-molecular weight hydrocarbons such as gasoline and LPG. High diesel index product of the paraffinic feedstock due to the high paraffin content of the produced diesel oil.
THE FEASIBILITY OF MICRO-CRYOGENIC TECHNOLOGY APPLICATION FOR ENHANCING DOMESTIC NATURAL GAS UTILIZATION, CASE STUDY : NATURAL GAS PROVISION AT R & D CENTRE FOR OIL AND GAS TECHNOLOGY "LEMIGAS" Yusep K Caryana
Scientific Contributions Oil and Gas Vol 23 No 1 (2000)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.23.1.1079

Abstract

Indonesia with a huge natural gas reserves distributed in various islands and separated by sea has utilized the gas for domestic energy source and petrochemical feedstock purposes. Transportation of the gas to its consumers can be in the form of either pipeline gas or Liquefied Natural Gas (LNG) schemes. Selection of the scheme chosen is determined based on its economic evaluation and technical reliability. The distribution of gas reserves in various islands segmented by sea in Indonesia in combination with economic activity concentration especially in Java island bring about difficulties in gas development due to the up-front massive investment required on gas pipe laying or LNG plant construction. It is therefore required to find a cheaper alternative to the scheme with an established safety standard application, in order that the domestic gas utilization will be able to be enhanced and thus reducing petroleum liquid import. An alternative that can be significantly considered is micro-cryogenic technology development in Indonesia for constructing a low capacity LNG plant so that a small scule of LNG can be economically produced. The LNG is then distributed to gas consumers at regions which has no existing and will not be viable for new gas network installation. Micro-cryogenic technology application is thought to be developed considering a preliminary feasibility study results. The study found that micro-cryogenic technology is around US$ 0,75 million (68,2%) cheaper than gas pipeline technology to provide natural gas for Gas Demonstration Plant operation at R& D Centre for Oil and Gas Technology "Lemigas"
PRECISION OF THE OCTANE NUMBER MEASUREMENT FOR GASOLINE BY PETROLEUM LABORATORIES IN ASEAN COUNTRIES (1999) Bustani Mustafa
Scientific Contributions Oil and Gas Vol 23 No 1 (2000)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.23.1.1080

Abstract

A high precision of octane number measurement according to standard measurement and to standard requirement is a must in the refining industry. The ASEAN Council on Petroleum (ASCOPE) Correlation Programme is conducted to obtain the precision of octane number measurement data for gasoline the normally used methods of ASTM D 2699 and IP 239. This programme is participated by 19 petroleum laboratories in ASEAN Countries. The test results of the various participating laboratories are subjected to statistical analysis to determine their average value, variance, standard deviation, and to rejected the outlier values. The Grubb T-Test method was used for the statistical rejection of outliers. This method appears to be quite satisfactory for ASCOPE purpose. The implementation of the Grubb T-Test ensures the laboratory consistency and this in turn will give the buyers or sellers of the gasoline confidence in the quality of the gasoline This paper presents the results of 26 ASCOPE Laboratories Test Correlation Programme for Octane Number Measurement (1999).
HORIZONTAL WELL PERFORMANCE MODELLING USING PSEUDOWELL TECHNIQUE Tunggal Tunggal
Scientific Contributions Oil and Gas Vol 23 No 2 (2000)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.23.2.1081

Abstract

The potential improvement of horizontal productivity has been recognized since mid 1950s, where horizontal well allows longer flow interval hence higher flow rate with lower pressure drawdown. Such remarkable productivity improvement has fascinated the great interest of petroleum industries around the world to fit the role of effective field development strategy. The objective is to reduce the overall cost of field development. In the case of offihore oil fields, the horizontal well drilling is desired to eliminate required number of vertical wells and utilizing of expensive sub-sea technology. The continuous development and application of horizontal well drilling technologies have been reported in many publications, Nowadays, the horizontal well drilling and completion with complex trajectory is possible. However, the costs required by horizontal well drilling and completion is still considerably more expensive than the vertical one. The future needs of horizontal well drilling tend to arise depending on the economical aspect by means the horizontal well productivity outweigh the incremental drilling and completion costs. An adequate method is required to estimate it's expected productivity to determine the economic feasibility. This paper proposes a horizontal well performance modeling by the concept of pseudowell technique.
THE HYDROCARBON LOSSES ON OIL CONTAMINATED SOIL BY LANDFARMING BIOREMEDIATION: A LABORATORY STUDY M. Udiharto; Agus Yusuf; Syafrizal Syafrizal
Scientific Contributions Oil and Gas Vol 23 No 2 (2000)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.23.2.1082

Abstract

Bioremediation, as a relatively new technology, is expected to be able to remediate the hydrocarbon contaminated soils which are often found in almost all areas of the petroleum industries activities. The bioremediation experiment had been conducted in a laboratory scale. The oil uncontaminated soil and parafinic oil samples are taken from an oil field. The soil is mixed with more than 5% hydrocarbon concentration in order to obtain an artificial oil contaminated soil. Indigenous microorganisms can grow on this oil contaminated soil. During incubation times, microbial cells grow rapidly, then followed by drastic decline of hydrocarbon contents on soils. It indicates that the indigenous microorganisms are capable to degrade petroleum hydrocarbon. On the addition of the organic fertilizer treatment, the highest degradation of hydrocarbon occurs. During four months of treatment, the hydrocarbon content on soil decreases more than 54%.
OIL AND GREASE DETERMINATION IN PETROLEUM OPERATION WASTE WATER R. Desrina; E. Jasjfi; M. Mulyono
Scientific Contributions Oil and Gas Vol 23 No 2 (2000)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.23.2.1083

Abstract

A regulation concerning waste water quality for oil and gas activities in Indonesia has recently been issued in the State Minister for Environment Decree No. 42/MENLH/10/1996. Waste water quality for oil and gas activities is classified in this decree according to the type of activities, namely exploration and production activities, refineries, and petroleum product storage and distribution activities. Maximum permissible concentration of oil and grease in waste water varies depending on the activities and mode of discharges. The oil and grease concentration in operation waste water that ranges from 20 ppm for the refineries to 75 ppm for off shore production have led to the variation in determination methodologies. Survey on oil and grease determination methods in Indonesia indicated that determination method ranges from gravimetric method that is unsuitable for light fraction to spectrometric method that depends on the oil standard. Moreover variation of solvent will give different result. This paper describes an overview of oil and grease determination conducted by the Indonesian oil and gas companies informing the advantages and disadvantages of each method. The possible single method that can be utilized as a standard method as well as approaches in conducting correlation program is proposed.
ESTIMATING POROSITY AND WATER SATURATION FROM SEISMIC/ACOUSTIC SIGNALS: A CORRECTION ON THE EFFECT OF SHALINESS Bambang Widarsono; Fakhriyadi Saptono
Scientific Contributions Oil and Gas Vol 23 No 3 (2000)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.23.3.1084

Abstract

The presence of shale in sedimentary rocks tends to introduce complexity in any formation evaluation activities. This is also the case when efforts are spent in estabilishing a method that enables analysts to estimate porosity and water saturation from seismic survey.
APPLICATION OF CT-SCAN IN CORE ANALYSIS Septi Anggraeni; Indra Jaya
Scientific Contributions Oil and Gas Vol 23 No 3 (2000)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.23.3.1085

Abstract

Computerized tomography (CT) is a new radiological imaging technique that measures density and otomic composition inside object. Since 1980, the CT has been applied in petrophysics and reservoir engineering. This paper discusess several petrophysica application in core analysis such as: quantification of complex mineralogy, characterixation drilling fluid invasion core quality control bedding detection, porosity determination, and fracture analysis.
ANALYTICAL METHOD FOR THE IDENTIFICATION OF OIL SPILL DISPERSANT COMPOSITION M. Mulyono; R. Desrina; E. Jasjfi
Scientific Contributions Oil and Gas Vol 23 No 3 (2000)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.23.3.1086

Abstract

Chemical dispersants are often used to disperse spilled oils, which threaten to pollute shoreline areas. In Indonesia all dispersants produced or marketed should undergo the toxicity test with regand to certain types of fish to determine the threshold limit, LC-50. The type of surface-active agent (surfactants) and the solvent used in the dispersants, which determine the dispersing quality, might be toxic to the marine species and bacteria.
A SIMPLE APPROACH FOR UNDERSTANDING SEISMIC WAVE PROPAGATION IN POROUS MEDIA Fakhriyadi Saptono; Suprajitno Munadi
Scientific Contributions Oil and Gas Vol 22 No 2 (1999)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.22.2.1088

Abstract

A simple approach for understanding seismic wave propagation in, porous media has been developed based on the effect of stress gradient on compressibility of the matrix and the fluid. The fluid saturation is accommodated in the bulk density formulation. The approach started from Gassmann theoretical formulation followed by simplifying the mathematical detail by substituting their physical aspects. Finally a practical formula for core analysis purposes is introduced. The theoretical concepts and experimental results appear to be in a good agreement.

Page 39 of 62 | Total Record : 619

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