MONITORING OF MICROBIAL ENHANCED OIL RECOVERY (MEOR) TECHNOLOGY APPLICATION BY BIOSTIMULATION IN OIL WELL X, SOUTH SUMATERA
The weakening of oil reserves in Indonesia forced oil company to gain efficiency and effectiveness from their oil wells in order to maintain their productivity. One of the technology to maximize it is Microbial Enhanced Oil Recovery (MEOR) using Biostimulation with the injection of cheap nutrition w...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/36275 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The weakening of oil reserves in Indonesia forced oil company to gain efficiency and effectiveness from their oil wells in order to maintain their productivity. One of the technology to maximize it is Microbial Enhanced Oil Recovery (MEOR) using Biostimulation with the injection of cheap nutrition which are Molasses, DAP (Diammonium Phosphate), and NPK fertilizer which can increase the production from a non-productive oil well. The purpose of this thesis is to monitor the abundance of microbes and physical-chemical characterization of crude oil in oil well X which has injected by 7.197% molasses, 0.28% NPK, and 0.307% DAP. This thesis took 2 months of both lab and field work with a month of nutrient injection and soaking before it. The monitoring of microbe abundance measured by Total Plate Count (TPC) method for total Aerobic, total Anaerobic, Sulfate Reducing Bacteria (SRB), and Hidrocarbonclastic Bacteria. Measurement of physical-chemical characterization from Viscosity, Interfacial Tension (IFT), Hydrocarbon Fraction, and pH. The result of this thesis show some changes from each measurement. In microbe abundance, colonies of aerobic and anaerobic culture sequentially are 1 x 102 CFU/mL and 5.45 x 101 CFU/mL become 2.5 x 102 CFU/mL and 9.5 x 101 CFU/mL with the highest peak of each culture sequentially are 1.37 x 107 CFU/mL dan 3.87 x 103 CFU/mL. The culture of SRB can be maintained in 5.85 x 101 CFU/mL from before injection was 3.1 x 101 CFU/ml to prevent biocorrosion. In physical-chemical characterization, the viscosity dwindled from 80.894 cP to 59.19 cP with IFT from 27.1 dyne/cm to 14.5 dyne/cm and also pH from 9.16 to 6.66. Hydrocarbon fraction data interpreted by the GC-MS (Gas Chromatography-Mass Spectrometry) which shows that the fraction becomes smaller. It is also supported by the presence of hidrocarbonclastic bacteria and can be the proof of MEOR success which raised from 7.6 x 101 CFU/ml to 3.95 x 105 CFU/ml. Secondary data from oil well which is water cut from the oil well decreased from 99.98 % to 96.97 % which show that there is some gain of crude oil production in oil Well X |
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