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M. Udiharto
Research and Development Centre for Oil and Gas Technology "LEMIGAS"
Chemical Engineering, Chemistry & Bioengineering Energy

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MICROBIAL EOR STUDY TO IMPROVE SWEEP EFFICIENCY IN CALTEX FIELDS PHASE 1 – NUTRIENT SELECTION Sri Kadarwati; M. Udiharto; Noegroho Hadi Hs; Joseph P. Brinkman; Bangun Yulianto
Scientific Contributions Oil and Gas Vol 25 No 2 (2002)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.25.2.1067

Abstract

The objective of this research is to find a cost effective nutrient that will stimulate the growth of in-situ microbes in Caltex Pacific Indonesia (CPI) oil fields to create sufficient biological products to plug high-permeability reservoir thief zones. If successful, injection fluids may be diverted into unswept regions of the reservoir, increasing the sweep efficiency und extending the production life of watered- out oil fields. This paper describes how a wide range of nutrients were researched and tested in the laboratory to achieve the objective. The primary findings of this study show that several primary nutrients were successful at creating bioproducts at high temperature, low salinity, reservoir conditions, and that molasses may be the most cost effective nutrient for all three CPI waterflooded reservoirs tested: Balam South, Bangko, and Minas fields. As a result of this work, laboratory studies were started to see to if the microbial growth created in laboratory test tubes can be recreated within reservoir core plugs to achieve sufficient permeability reduction to justify field trial (s). The core flood process and techniques will be presented in a separate paper.
SELECTED INDONESIAN MICROBES POTENTIALS FOR MEOR S. Kadarwati; M. Udiharto; Noegroho Hadi Hs; Indria Doria
Scientific Contributions Oil and Gas Vol 25 No 3 (2002)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.25.3.1071

Abstract

Oil recovery can be increased through the activities of microbes in a process known as Microbial Enhanced Oil Recovery (MEOR). MEOR technology has been implemented in a number of oil producing companies and has proven to have a good prospect, environmentally friendly and low cost. The microbes which proliferate in Indonesian oil fields should be subjected to laboratory identification. Samples of formation water, oil, and soil were taken from various oil fields. These oil fields were selected on account of their reservoir temperatures which promise optimum growth of microbes. In order that MEOR can be applied in these oil fields, the existing microbes in their oil wells were isolated and identified. Based on the results of isolation and identification activities several indigenous bacteria species were obtained from the oil well environment. The potential of each bacteria species for use in MEOR process depends on their ability to live and grow in the reservoir environment as well as the bioproducts produced, such as biosurfactant, bioacid, and biosolvent. The bioproducts produced depend on the inherent capability of the isolate as well as the support of the medium and environmental condition. From the tests of their capability to grow in hydrocarbons, and live in semianaerobic condition, 12 isolates, were selected and some isolates were found to produce such bioproducts. The selected microbes and nutrient have been experimented by using microbial core flooding apparatus. The result has a good prospect for implementation in the oil field.
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%.
POTENTIALS OF BACILLUS STEAROTHERMOPHILLUS FOR ENHANCED OIL RECOVERY A LABORATORY EXPERIMENT M. Udiharto; S. Kadarwati; E. H. Legowo; M. Rahman; E. Jasjfi
Scientific Contributions Oil and Gas Vol 18 No 1 (1995)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.18.1.1101

Abstract

B. stearothermophillus was isolated from among microbes recovered from a formation water from an oil field in Indonesia, where the temperature was 55°CLaboratory experiment was conducted to measure the growth, and to study the effects of its activity on the physical characteristics of reservoir rock and crude oil in an oil well.
Co-Authors Agus Yusuf Bangun Yulianto E. H. Legowo E. Jasjfi Indria Doria Joseph P. Brinkman M. Rahman Noegroho Hadi Hs S. Kadarwati Sri Kadarwati Syafrizal Syafrizal