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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 4 Documents
 1 
Search results for , issue "Vol 8 No 2 (1985)" : 4 Documents clear
Offshore Exploration For Hydrocarbons In Indonesia Dr. B Situmorang
Scientific Contributions Oil and Gas Vol 8 No 2 (1985)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.8.2.901

Abstract

Indonesian offshore areas in 1985 are still the loci of an active exploration program.  Exploration activities are anticipated to be at the same level as in 1984. A new ofl field in the East Java Sea (the Madura field) began production in September 1985 with initial production of 10.9 MBOPD.  The month of August 1985 is marked by the significant oil and gas discovery in the Banggai basin, offshore East Sulawesi, where the Tlaka-1 exploratory well flowed 3864 BOPD (29° API) and 1.1 MMSCF gas (60 ppm HS) from  Middle Miocene plat-form carbonates.  Together with exploration drillings in the area beyond the continental shelf which have been started since February 1984 such as in the area north of Lombok, the discovery will encrease enthusiasm for exploration of the frontier areas especially in the geologically complex reglon of Eastern Indonesia.  It also reveals that potential accumulation of hydrocarbons could also occur within the collision complex.
INFLUENCE OF THE PARTICLE SIZE OF CATALYST ON THE HYDROCRACKING OF VACUUM DISTILLATE INTO MIDDLE DISTILLATE AND LUBRICANT BASE STOCK A.S. Nasution
Scientific Contributions Oil and Gas Vol 8 No 2 (1985)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.8.2.1160

Abstract

In order to obtain more data on the hydrocracking catalysts, an experiment has been carried out to study the hydrocracking of vacuum distillate into middle distillate with operating conditions: temperature: From 390 to 420°C: LHSV: from 0.45 to 0.90;  presRure: 125 kg/cm and HHC ratio: 1000 It/lt by using Two Ni-Mo/Al 03 SIO, catalysts with various particle stzes using a Catatest unit operated in a continuous sys- tem.Gas product sample was analyzed by using a gas-liquid chromatography, The liquid product were fractionated and bottom products were dewaxed by solvent dewaxing.Based on the experimental data show that :By increasing the operating temperature, LHSV, and decreasing of the particle size of the Ni-Mo/Al0Si0, cutalyst, the conversion rate, the quality of the middle distillate, and the lubricant base stocks products in  - crease, but the selectivity of these products will decrease.At operating conditions T= 400°C, P-125 kg/cm;  LHSV = 0.45;  and H/HC ratio : 1000 It/lt, the conversion rate, smoke point of kerosene, diesel index of gas oll, viscosity index of lubricant base stock decrease from: 54.08 to 50.08% by weight;  from 22 to 16 mm, from 62.0 to 57.7 and from 133 to 118 for the low particle size and high particle size of the Ni-Mo/Al 0rSiO, catalysts respectively.  The apparent activation energy of vacuum distillate is obtained 28,717 and 23,720 kcal/mol for the low par ticle size and the high particle size of the Ni-Mo/Al-0SIO2 catalyst respectively.
A COMPUTER PROGAM FOR COMPUTING SISMIC WAVE REFLECTION AND TRANSMISSION COEFFICIENTS OF A SINGLE INTERFACE Suprajitno Munadi
Scientific Contributions Oil and Gas Vol 8 No 2 (1985)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.8.2.1161

Abstract

Reflection and transmission properties of a single interface form the basic step in understanding and solving many problems of seismic waves propagation in multilayered media.  The computational procedure of these coefficients is an essential element for numerical modeling or simulation purposes.  A computer program for computing seismic wave reflection and transmission coefficients of a single interface has been effectively performed using the Gauss-Jordan elimination technique which is operated on a 4x 4 system of simultaneous linear equations with complex elements.  The simultaneous equations have been ar ranged in matribx from.  Elements of the matrix are obtained from the application of the boundary conditions to the solution of the seismic wave equations.  The reflection and transmission coefficients for the compressional and shear waves constitute the unknowns of the simultaneous linear equations.  Experiments using the program demonstrate the efficiency and the precislon of this procedure.
5th ANNUAL ASCOPE LABORATORY TEST CORRELATION PROGAMME ON CFR ENGINE (1983) Bustani Mustafa; E. Jasjfi
Scientific Contributions Oil and Gas Vol 8 No 2 (1985)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.8.2.1162

Abstract

A high precision CFR Engine Laboratory operating according to standard requirement is a must in the oil industry, It is also of very high importance within work of research activities on the use of hydrocarbon fuels. In ASEAN we have the ASCOPE correlation program on CFR engine laboratory to obtain precinion data in the gusoline by CFR test research method.  Member countries taking part in the 5 laboratory test correlation program for CFR engines are Indonesia as coordinator with six participating laboratories, Malaysia, Philippines, Singupore and Thailand with two laboratories each and USA with are laboratory. The 5th correlation program was started by sending sample by the program correlation in Jamuary, 1983 after being tested the participating laboratories, the test renilt were sent to the program coordinator who procured the result for the determination of standard deviation according to precision and statistics.  Based on result, conclusion can be drawn about the deviation of laboratory test results.

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