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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 8 Documents
 1 
Search results for , issue "Vol 31 No 3 (2008)" : 8 Documents clear
EFFECTS OF MATRIX SWELLING ON COAL PERMEABILITY FOR ENHANCE COALBED METHANE (ECBM) AND CO2 SEQUESTRATION ASSESSMENT PART I: LABORATORY EXPERIMENT Ego Syahrial
Scientific Contributions Oil and Gas Vol 31 No 3 (2008)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.31.3.1009

Abstract

It has been reported that coal matrix swelling/shrinkage associated with CO2 , adsorption/desorption are typically two to five times larger than that found for methane, yet there has been no direct measurements of this effect on permeability of coals to CO2 . The feasibility of ECBM/CO2 sequestration technology depends very much on the magnitude of matrix swelling effect on permeability, especially in deep, low permeability coal seam reservoirs. The main objective of this research is to investigate the effects of coal matrix swelling induced by CO2 adsorption on the permeability of different coals which have been undergoing methane desorption under simulated reservoir conditions in the laboratory. Coal and reservoir properties which may impact upon this behaviour will be identified through extensive laboratory testing. This paper – first of two – presents the procedure for the laboratory tests as well as the findings. In the second part, a field permeability model for enhanced methane recovery and CO2 sequestration, incorporating the findings of the current laboratory tests, would be developed.
A SINGLE PHASE MODEL FOR ANALYZING GAS PIPELINE NETWORKS Edward ML. Tobing
Scientific Contributions Oil and Gas Vol 31 No 3 (2008)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.31.3.1010

Abstract

A single phase flow model has been developed for gas distribution pipeline networks. The model is developed based on looped-system approach with some modifications. In this model, a equation of state model is implemented for predicting the gas properties required for the governing equations of the network system. By utilizing the Linear Theory Method, the Panhandle’s single phase gas flow model is implemented in this model to predict the hydrodynamic variables in each leg of the network using the iterative technique which is developed in this study. A generalization of the single phase network model is provided thereby making it possible for the single flow model used to be replaced by another one that may be more applicable for a particular situation. Using the iterative procedure developed, pressure at all nodes, gas flow rate at each leg can be predicted. The test results demonstrate that the model can serve as a predictive and design tool for solving a single phase gas flow problem in pipeline network.
STUDY ON ZERO FLARE POLICY FOR OIL AND GAS EXPLORATION AND PRODUCTION INDUSTRY IN INDONESIA R. Desrina; Supriyadi Supriyadi
Scientific Contributions Oil and Gas Vol 31 No 3 (2008)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.31.3.1011

Abstract

Flaring is an essential practice in oil and gas production, primarily for safety reasons. Although data indicate that, on a worldwide basis, gas flaring contributes only 1% of anthropogenic carbon dioxide emissions, for environmental and resource conservation reasons, flaring should always be minimized as much as practicable. In the frame work of Global Gas Flaring Reduction Public-Private Partnership (GGFR), Government of Indonesia (GOI) through Directorate General of Oil and Gas is preparing a draft policy for Green Oil and Gas Industry Initiative (GOGII). GOI encourage oil and gas activity in Indonesia to be environmental friendly industries by implementing Zero Flare, Zero Discharge, Clean Air and Go Renewable programs. Zero flare can be achieved by different kind of methods, such as re-injection of associated gas, gas utilization on-site, and collection and market to downstream markets. This paper tries to review and evaluate the possibility of implementing the zero flare policy for oil and gas exploration and production industries in Indonesia, in the frame work of contributing to GOI in preparing draft policy for GOGII.
CALCULATION OF NITROGEN HEAT ADSORPTION ON VARIOUS CATALYSTS USING BET-CONSTANT (BET-C) DATA Triyono Triyono; Wega Trisunaryanti; Oberlin Sidjabat
Scientific Contributions Oil and Gas Vol 31 No 3 (2008)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.31.3.1012

Abstract

BET-C (Brunauer-Emmett-Teller-Constant) was used to calculate the heat of adsorption (ΔHads) of nitrogen gas on the various catalysts. The well-known Brunauer–Emmett– Teller (B.E.T.) equation is used primarily to determine the surface area from the physical adsorption of a gas on a solid surface. Surface area of catalysts was determined by using surface area analyzer (NOVA 1000). The BET-C included in the data is usually neglected or is not taken into account. However, by using the basic principles of the adsorption theory fitted with the functions based on the BET adsorption model, the important data of BET-C can be shown in this study. The value of the ΔHads (N2 ) for zeolite, H-zeolite, Pt/zeolite, Pt-Pd/zeolite, and Pt-Ce/zeolite calculated from the equation derived from BET-C are -6.43, -6.52, -8.78, -8.69, -9.71 and -9.52 kJ/mol, respectively.
DETERMINATION OF PG12S SURFACTANT PHASE BEHAVIOUR IN THE MIXTURE OF OIL - SURFACTANT - COSURFACTANT - WATER Tjuwati Makmur; Nuraini Nuraini
Scientific Contributions Oil and Gas Vol 31 No 3 (2008)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.31.3.1013

Abstract

Surfactant is surface active agent chemical, while isopropyl alcohol (IPA) and also isobutyl alcohol (IBA) are known as cosurfactant and include types of alcohols used in enhanced oil recovery (surfactant flooding) method. Factors of surfactant, cosurfactant, and NaCl concentrations play important role in determination of phase behavior. Based on the results of phase behavior tests that the mixture of oil – PG12 surfactant – cosurfactant (IPA & IBA) – WIP water showed macroemulsion phase for all analyzed samples at different experimental conditions. PG12 surfactant is unable to be used for enhanced oil recovery by chemical injection, because it is very difficult to flow in porous media and to displace oil, because the occurrence of plugging which is caused by opaque and milky macroemulsion.
SURFACTANT PROPERTIES EVALUATION FOR CHEMICAL FLOODING Sugihardjo Sugihardjo
Scientific Contributions Oil and Gas Vol 31 No 3 (2008)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.31.3.1014

Abstract

The need of EOR techniques in the late field production period is essential to get the third wind of incremental oil. Chemical injections are proven technologies not only at the laboratory scale but also at the field scale which have been implemented in many parts of the world. Surfactant is an important chemical in this technology, which mostly has been used to reduce the capillary trap of the oil in the reservoirs. The selection of surfactant type which is suitable for a specific oil field to increase the oil production should fulfill the selection criteria. Laboratory works firstly should be done to evaluate the important properties based on the industrial standard procedures. These laboratory tests include compatibility test, aqueous stability test, phase behavior study, micro-emulsion viscosity, interfacial tension determination, thermal stability test, and filtration test.
EFFECT OF BIOSURFACTANT PRODUCED BY BACILLUS IN OILY WASTEWATER DEGRADATION Sri Kadarwati; Leni Herlina
Scientific Contributions Oil and Gas Vol 31 No 3 (2008)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.31.3.1015

Abstract

Liquid waste from oil industry activities has potential cause environmental pollution. These liquid wastes, containing hydrocarbon and heavy metals, are mostly toxic. Therefore, biotechnology by means of biological treatment can be applied for decomposing the toxic liquid wastes. The biosurfactant production from some microorganisms can support hydrocarbon degradation. The objective of this study is to examine the crude biosurfactant that is extracted from the selected Bacillus which was precipitated by using methanol on acid moiety. The crude biosurfactant extract were tested to support hydrocarbon degradation. Three species of Bacillus used in this experiment were compared based on their respective biosurfactant production. The results showed that the percentage of hydrocarbon degradation on liquid waste from refinery by the three Bacillus species were 90.23% (Bacillus subtilis), 88.72% (Bacillus licheniformis), and 73.43% (Bacillus laterosporus). The concentration of remaining oil after 28 days was 20.44 mg/L, 23.38 mg/L, and 54.87 mg/L, respectively. The decrease of COD were 84.90%, 84.04%, and 80.68%, respectively, and the COD value after 28 days treatment were 165 mg/L, 174 mg/L, and 211 mg/L.
LEGAL FRAMEWORK ON POLICY FOR NATURAL GAS DEVELOPMENT AND UTILIZATION Wiwien Winarsih
Scientific Contributions Oil and Gas Vol 31 No 3 (2008)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.31.3.1016

Abstract

Due to declining of crude oil production and global energy crisis, development and utilization of natural gas policy should arrange to meet domestic demand. The gas sector’s potential is bright; domestic, regional and international demand for natural gas is expected to rise dramatically over the next decade. To capitalize on this opportunity, Indonesia must improve its gas infrastructure, expand power capacity and attract new investment that will create new sources of production. Legal framework for natural gas exploration and production and downstream activities should be directed to create conducive investment atmosphere and to provide the sustainable of natural gas availability.

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