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All Journal LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI Scientific Contributions Oil and Gas
Tjuwati Makmur
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Environmental Science

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The Influence Of Ph And Concentration Of Phosphonate Inhibitor - Tests On Change Of Barium Sulfate Scale Morphology By Using Scanning Electron Microscope Tjuwati Makmur
Scientific Contributions Oil and Gas Vol 27 No 2 (2004)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.27.2.873

Abstract

Water injection is often used to keep maintaining reservoir pressure. Injected water (high in sulphate) mixes with formation water (high in barium) leading to the deposition of barium sulfate scale in the near wellbore, reservoir, production tubulars and topside equipment. Barium sulfate scale is unique scale deposit and the least soluble of the scales. The deposition of oil field scale is a potentially damaging problem which reduces fluid flow resulting in a decline in oil production. The best approach to solving the problems of scale formation is to prevent or inhibit deposition and this is more effective than scale removal. The use of scale inhibitor can be effective method for preventing scalealthough their effectiveness is controlled by experimental conditions. Therefore, it is very important to know factors that influence barium sulfate scale. The maintopic of this paper is “The Influence of pH and Concentration of Inhibitor Solution - Tests on Change of Barium Sulfate Scale Morphology by Using Scanning Electron Microscope”. Hopefully, the results of laboratory test presented this paper give useful and valuable information not only for LEMIGAS, but also for oil industry, chemical manufacturers and universities, then other institutions.
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).
DETERMINATION OF TOTAL BACTERIA COUNT AND SELECTION OF INJECTION WATER QUALITY RATING CHART FOR WATER FLOOD NEEDS IN SUMATRA OIL FIELDS Nuraini Nuraini; 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.30.3.978

Abstract

An important factor affecting the success of a water flood project for secondary recoveryis the quality of the water being injected. In this research, the water quality tests werefocused on determination of total bacteria counts of the analyzed injection water sampleusing ASTM D 5465-93 and selections of injection water quality rating chart for waterflood needs in Sumatra oil fields. The results of microbiological laboratory tests of allanalyzed injection water samples showed three parts. An injection water sample of N - 82containing type of bacteria Bacillus sp with the total bacteria counts 5.02 x 100 colonies/ccwas categorized as no. 1 water quality rating chart. Subsequently, G – GS injection watersample indicated Bacillus sp with total bacteria counts 4.28 x 101 colonies/cc and BacillusLaterosporous with total bacteria count 3.31 x 101 colonies/cc for G – 90 water sample.Two samples mentioned above were classified as no. 2 water quality rating chart. Next,Bacillus Alvei was found in T – 21 injection water sample with total bacteria count 1.85 x102 colonies/cc and Bacillus Pathothenticus in T – GS injection water samples with totalbacteria count 2.61 x 102 colonies/cc. Position of water quality rating chart for both lastsamples were no. 3. These results gave valuable and useful information before implementationof water flood in the oilfield.
Co-Authors Hadi Purnomo Nuraini Nuraini Nuraini Panca Wahyudi Sugihardjo Sugihardjo Supnyatno