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Scientific Contributions Oil and Gas
Published by LEMIGAS
ISSN : 20893361     EISSN : 25410520     DOI : -
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.
Articles 4 Documents
Search results for , issue "Vol 10 No 2 (1987)" : 4 Documents clear
Emplacement Of The Meratus Ultrabasic Massif A Gravity Interpretation Dr. B Situmorang
Scientific Contributions Oil and Gas Vol 10 No 2 (1987)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.10.2.896

Abstract

Based on gravity data, extensive outcrops of igneous ultrahasic rocks at Meranus Range in Southeast Kalimantan have been interpreted as part of oceanic crust emplaced onto the margin of the Sundaland. The Meratus ultrabasic massif appears to be a thin slab with relative thickness of 300 m, thickening to 350 m to the southeast. If terpentinization of ulrabasie rocks is taken into account, the thickness of the allochtonous masses will increase to 780 m. Considering the occurrence of similar rocks in Kukusan Mts, Laut Islard and the South Am of Sulawesi, we suggest that the Metsaas massif forms part of a larger oceanic enustal segment emplaced during the Middle Cretaceous obducrion.
ATTENUATION ANALYSIS OF VSP DATA Suprajitno Munadi
Scientific Contributions Oil and Gas Vol 10 No 2 (1987)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.10.2.1151

Abstract

Attenuation is usually defined to include all types of frequency selective process wich contribute to the am- plitude decay of propagating waves. It depends on porosity of rock, grain size, over pressure zones and fluid saturation. Attenuation can at least double the information obtained from velocities alone.            The measurement of attenuation from a Vertical Seismic Profiles (VSP) has been carried out using two dif- ferent methods ie. the Spectral Magnitude Decay Method and the Pulse Broadening Method. The Spectral Magni- tude Decay Method is executed in the frequency domaiün, while the Pulse Broadening Method is entirely executed in the time domain.            Both methods have been tested using two shallow, high resolution VSP data. The deduced quality factor Q. obtained from the Spectral Magnitude Decay Method is slightly lower than those obtained from the Pulse Broadening Method. Thèse discTepancies can be attributed to reflection/transmission loses at layer boundaries which are lumped together with absorption in the frequency domain estimates.
THE EFFECTS OF FUSEL OIL BLENDING ON GASOLINE FUEL CHARACTERISTICS E. Jasjfi
Scientific Contributions Oil and Gas Vol 10 No 2 (1987)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.10.2.1152

Abstract

Fusel oil, which comprises a mixture of kigher alcohols, has prospective potentialirien for use at a conobrent in gasoline-methanol blends since ir can improve their water tolerance, Thie has been demonatrated in an earlier work by the author.            The present paper presents the reults of a serier of tests made to investigate the effects of funel oil addition to the actual gasoline fuel characterisies The resules indicated that such addition Could remult in improving the gsoline propertles s can be exemined through comparisom with the established specifications.
SURVEYS AND OIL POLLUTION IN THE ASEAN COUNTERIES Jaspar Billal
Scientific Contributions Oil and Gas Vol 10 No 2 (1987)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.10.2.1153

Abstract

The Sourheast Aslan Seas it a region having valuable and vulneruble marine and coattul resources and sinuated along denaely shipping router and oil uctiviries.            The concerm of the coastal countries in the repion on marine oil pollution has been pointed out in uriout regional meetings.            Many researchen and their institution started to look on the level of the contaminarion The author tummartzer and compare all information available and expose the g of knowledge on the extent of oil contamination tn the region.            A Regional Cooperation for the asseument and enaluarion af ol polhution it needed and being exrablished to ennure and obtain a compatible data and meaningful regional innerpretarion, 

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