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INDONESIA
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
 27   28   29   30   31 
Carbon Monoxide Axidation Over Pt/Y-Alumina Catalyst Triyono Triyono; Chairil Anwar
Scientific Contributions Oil and Gas Vol 21 No 2 (1998)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.21.2.955

Abstract

Oxidation of CO has been studied on Pt/y-alumina catalyst. The catalyst was produced by impregnating y-alumina with hexachloroplantic acid solution, calcined, oxidized and reduced at the optimum condition. Catalyst was characterized by nitrogen sorption measurement and scanning electron microscope (SEM). By optimization of calcination, oxidation and reduction on the catalyst preparation, a residual serface area of 129.14 m²/gram was obtained. The resulting catalyst has a high activity for the conversion of CO to CO₂.
Hydroconversion Of Heavy Distillate Into Lube Base Stock Using Bi-Functional Catalysts A.S. Nasution; E Jasjfi
Scientific Contributions Oil and Gas Vol 21 No 2 (1998)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.21.2.956

Abstract

Hydroconversion process replaces the furfural stage and dewaxing part of conventional processs of lube base stock production. To study the ability of this hydroconversion process to weed low viscosity index component out of heavy distillate fraction to produce high viscosity index lube base stock,  an experiment has been carried out on the hydroconversion of three feedstock types, I,e,: non-paraffinic vacuum distillate (NPVD), paraffinic vacuum distillate (PVD) and paraffin-wax (WAX), using three bifunctional catalysts having low, medium abd high acidities. The experiment was done at the following operating conditions: temperature from 380° to 420°C, pressure: 100 kg/cm² and H₂/HC ratio: 1000 L/L using a Catatest Unit operated in continuous system.The experimental data shows that at 50% by wt. feedstock conversion, the yields and viscosity index of lube base stock product are 20.7% by wt. and 118; 25.5% by wt. and 136; and 29.5% by wt. and 164 for NPVD, PVD and high acidity bifunctional catalysts, respectively. By conventional process, PVD feedstock produces 10-15% by wt. lube base stock with viscosity index lube 90 to 100.The high viscosity index of lube base stock product, obtained by hydroconversion process, suggest that a part of condensed aromatics is converted into naphthenes, which are then selectivity hydrocracked into single alkyl aromatics by both the metal site and acid site of the bifunctional catalysts. With medium and high acidity bifunctional catalysts, isomerization and cyclization of wax feedstock into isoparaffins and single ring alkyl-naphthene ring of vacuum distillate feedstock into single ring alkyl-aromatic is quite dominant with medium acidity catalyst.
Risk Management And Policy Of B3* Wastes From Natural Gas Industry In Indonesia D. A. Ismukurnianto
Scientific Contributions Oil and Gas Vol 21 No 2 (1998)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.21.2.957

Abstract

The main natural gas industry activities that may produce by-product or wastes are exploration, production, storage, gathering, processing, transmission, distribution or some combination of these. Compressor station, for example, generates various types and quantities of waste, which must be managed responsibly, in a manner that does not threaten human health or the environment.It is helpful to identify types and quantities of waste produced, especially hazardous and toxic material (B3), in order to determine waste disposal options and to prepare management procedures in advance of waste being generated. In order side, regulatory body has provided some regulations regarding hazardous and toxic waste management. Finally, it is important to evaluate the risk of hazardous and toxic wastes in order to provide waste management policy. These topics will be discussed in detail in this paper.
Water Flood Analysis To Predict Additional Of Oil Recovery From Oil Reservoir Herlan Adim
Scientific Contributions Oil and Gas Vol 21 No 2 (1998)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.21.2.958

Abstract

Water injection, the most widespread secondary method of oil recovery, is a pattern flooding when water is injected over the entire oil bearing area of the reservoir.The main reason why this method is so widely used is the high recovery achieved when water is the displacing agent both in the case of a natural water drive and when water injected into reservoir artificially. However, if the flooding operation is carried out carelessly, the result may be entirely negative or wasteful operation. One of the primary objectives of water flood analysis is to predict additional oil recovery obtained by water flooding from oil reservoirs.This paper presents a practical use of water flood method for formation evaluation of reservoir hydrocarbon and provides information that will be of practical value to geologist and engineers involved in the interpretation of water flood data; these then become the reference for an economic projection of the profitability of the waterflood.
PALYNOLOGICAL INVESTIGATION OF THE OLIGOCENE SEDIMENT IN EAST JAVA SEA Eko Budi Lelono
Scientific Contributions Oil and Gas Vol 30 No 1 (2007)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.30.1.970

Abstract

The palynological study of the Oligocene sediments is based on cutting samples collected from the exploration wells which are drilled in East Java Sea. The occurrence of pollen Meyeripollis naharkotensis along the well sections suggests the pollen zone of Meyeripollis naharkotensis which is equivalent to Oligocene age. This is supported by the regular occurrence of the Oligocene marker of the trilete spore of Cicatricosisporites dorogensis along the studied well sections. In addition, foraminiferal and nannoplankton analyses confirm the Oligocene age by identifying the occurrence of letter stage of Tc- Te4 and nanno zone of NP21-NP25. On the other hand, most palynomorphs marking Eocene age disappear from the studied wells as they are stratigraphically older than the studied sediments. Unlike the Oligocene sediment of West Java and Central Sumatra which was formed in the freshwater swamp or lake under dry climate condition, the studied sediment was deposited in the transition to shallow marine environment as indicated by the moderate diversity of marine dinoflagellates coupled with the frequent occurrence of limestone along the sections. Furthermore, the regular appearance of back-mangrove pollen of Spinizonocolpites echinatus throughout the well sections supports the indication of marine influence. The appearance of the Australian immigrants including Dacrydium (common occurrence) and Casuarina (regular occurrence) may indicate earlier arrival of the Australian continent in this area compared to that in other areas of Indonesia.
NYPA PALM SAP AS FEEDSTOCK FOR FERMENTED ALCOHOL PRODUCTION M Udiharto
Scientific Contributions Oil and Gas Vol 30 No 1 (2007)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.30.1.971

Abstract

Nypa palm is the among the few palms that grow well in mangroves. The tapping fromfruit of nypa palm that produces the sap is a good substance for alcohol fermentation dueto its high sugar and low ash contents.The implementation of alcohol fermentation by nypa palm sap was conducted in laboratoryscale. The result shows that the sap of nypa palm is a good feedstock for fermentedalcohol. The best yield is obtained by fermentation of feedstock containing 25% starter,4% NPK solution, and 5% bread yeast. The yield of alcohol concentration is about 11%(88% alcohol content) of feedstock.
INDONESIA’S NATURAL GAS: PRODUCTION, RESERVES, AND CHALLENGES Bambang Widarsono
Scientific Contributions Oil and Gas Vol 30 No 1 (2007)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.30.1.972

Abstract

Recent years has witnessed decline in national oil production at an alarming rates of  higher than 10% annually. On the other hand, national gas reserves and production situation  is much better even though problems such as unanticipated production shortfall of  existing fields and commerciality of new reserves have still to be faced. Analysis on history  of production and reserves and comparison between oil and gas discoveries in recent years  may lead into a conclusion natural gas may serve as an alternative source for energy and  national income in years ahead. However, challenges such as technology, infra-structures,  law enforcement, social unrests, tight regulations, and incentives are still day-to-day  reality. These challenges need to be addressed appropriately if sustainable gas, and also  oil, productions are to be achieved.  
THE INFLUENCE OF GASOLINE’S AROMATIC CONTENT ON ENGINE COMBUSTION CHAMBER DEPOSIT FORMING Djainuddin Semar; Nur Ahadiat
Scientific Contributions Oil and Gas Vol 30 No 1 (2007)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.30.1.973

Abstract

Aromatic content in gasoline fuels should be limited due to its influencies to the cleanessof engine combustion chamber and emission of carbon monoxide, carbon dioxide andhidrocarbon. Ussually the highest aromatic content mean more higher its benzene contentand it will couse increase of air pullotion. According to specification of gasoline 91(SKNo. 3674 k/24/DJM/2006), maximum aromatic content is 50 % volume. Those specificationconform to catagory 1 of World Wide Fuel Charter (WWFC). However, aromatic and benzenecontent test on domestic gasoline in Indonesia obviously fulfil maximum limit for gasolinecatagory 2 of WWCF. Effect of several volume variaties of aromatic content in gasoline91 againts deposit development and cleaness (rating) of engine combution chamberwill be discuss in this paper.
SEISMO-ELECTRIC PHENOMENA FROM GRANITE CRACK CONTAINING CRUDE OIL Suprajitno Munadi
Scientific Contributions Oil and Gas Vol 30 No 1 (2007)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.30.1.974

Abstract

Seismo-electric phenomena gained more attention from geophysicists over the last decade.The development of theoretical background and the success of laboratory experimentsas well as limited field applications give a lot of opportunities and hope as a meansfor providing exploration and production data. Seismo-electric effect accommodates anyphenomena which links seismic and electrical energy including seismic to electric conversionas well as electro kinetic in origin.Experiment has been conducted to prove that free ions can be considered to accumulateinside a granite crack containing crude oil which in turn can generate stream oscillatoryelectric current when a seismic wave hit the fracture. As a result, electric potential canbe detected at the mouth of the fracture which intersects the borehole. The environmentalnature of the mouth which is full of fluid facilitates the detection of high resolution seismoelectricsignal by simple electrodes which is made of metal.
STUDY OF CALCIUM SULFATE SCALING INDEX TENDENCY CALCULATIONS AT DIFFERENT TEMPERATURE CONDITIONS IN INJECTION WATER SAMPLES FROM OILFIELDS Tjuwati Makmur
Scientific Contributions Oil and Gas Vol 30 No 3 (2007)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.30.3.975

Abstract

Calcium sulfate scale is a type of scale found in petroleum industry and shows seriousproblem, because it can plug pore media and cause a decrease in production rate.Actual calcium sulfate (CaSO4) concentrations of S1, S2, S3 and S4 injection watersamples were in the range of 0.0208 to 0.4583 meq/l. While, the values of solubility ofS1, S2, S3 and S4 water samples at 77,145 and 1770F are in a range of 23.20 to 27.43meq/l. Based on the results of calcium sulfate scaling tendency calculations showed thatthe values of solubility of S1, S2, S3 and S4 water samples at various temperature conditions(77,140 and 1750F) are higher than actual CaSO4 concentrations for the samewater samples. No occurrence of CaSO4 scale was found in all analyzed injection watersamples at different temperature conditions (77,140 and 1750F).

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