Enhanced Oil Recovery Techniques for Indian Reservoirs

Sakthipriya, N.; Doble, Mukesh; Sangwai, Jitendra S.

doi:10.1007/978-3-319-03119-4_11

Cited by 6 publications

(8 citation statements)

References 78 publications

(84 reference statements)

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“…In the case of microbial methods, microorganisms help to degrade longchain hydrocarbons into short-chain hydrocarbons, thereby reducing the viscosity and increasing the mobility of the HCO. 12 Steam flooding is the most frequently used thermal method for the reduction of viscosity of heavy crude oil. The injection of heat breaks down the asphaltene molecules, thereby causing a reduction of the viscosity and further enabling the crude oil to flow toward the production well.…”

Section: Introductionmentioning

confidence: 99%

Effects of Imidazolium-Based Ionic Liquids on the Rheological Behavior of Heavy Crude Oil under High-Pressure and High-Temperature Conditions

2017

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The production, processing, and transportation of heavy crude oil (HCO) is difficult because of its high viscosity. For practical applications, information on the rheological behavior of HCO plays an important role, especially in flow assurance investigations. In this work, six different imidazolium ionic liquids (ILs) were tested for their effects on the rheological behavior of HCO under high-pressure and high-temperature conditions. The rheological studies were carried out at three different pressures (0.1, 5, and 10 MPa) and four experimental temperatures (298.15, 323.15, 348.15, and 373.15 K). The HCO + IL systems showed favorable viscosity reductions of 26.5% and 31.5% for the systems of HCO + 1-butyl-3-methylimidazolium chloride ([BMIM]+[Cl]−) and HCO + 1-octyl-3-methylimidazolium chloride ([OMIM]+[Cl]−), respectively, at 298.15 K and 0.1 MPa as compared to the pure HCO system. At 298.15 K and 0.1 MPa, the yield stress of the HCO + IL systems was reduced by about 15–20%, whereas when the temperature was increased to 373.15 K, the yield stress decreased in the range of 25–30% as compared to that of neat HCO. The viscoelastic moduli of the HCO sample at 0.1 MPa, 298.15 K, and about 1.5% strain were found to be G′ (storage modulus) ≈ 11 Pa and G″ (loss modulus) ≈ 7 Pa, indicating that the HCO sample was solidlike, whereas for the HCO + IL systems, the G′ and G″ values were reduced to ∼7 and 3 Pa, respectively. The crossover frequency of the HCO + IL systems was reduced to the range of 25–30% as compared to that of pure HCO. From the various measurements, it was observed that the addition of the ILs to the HCO resulted in improved rheological properties compared to those of the pure HCO system. Further, the results of the microscopic investigation also supported the rheological studies, indicating that the addition of the ILs helped to break the large flocculated structures of HCO into smaller spheres. It was also observed that the IL with the longer alkyl chain length provided greater efficiency in the viscosity reduction with favorable viscoelastic behavior.

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Section: Introductionmentioning

confidence: 99%

Effects of Imidazolium-Based Ionic Liquids on the Rheological Behavior of Heavy Crude Oil under High-Pressure and High-Temperature Conditions

2017

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“…It was observed that the cell surface hydrophobicity (CSH) of P. uorescens was higher when grown on eicosane, while the CSH of P. aeruginosa was higher with the hexadecane substrate. 22 Hence, we can infer that the growth of P. aeruginosa was found to be higher in the presence of hexadecane, whereas the growth of P. uorescens was higher in the presence of eicosane.…”

Section: Growth Of the Microorganisms On Paraffinsmentioning

confidence: 83%

“…In our previous work, 22 we have executed the studies regarding the production of biosurfactants using Pseudomonas aeruginosa and Pseudomonas uorescens in the presence of various long chain hydrocarbons, such as hexadecane and eicosane. The above-mentioned study has presented the improvement in the production of biosurfactants using these two bacteria in the presence of hydrocarbons, their characterization, stability, and interaction with solid and liquid paraf-ns.…”

Section: Introductionmentioning

confidence: 99%

Systematic investigations on the biodegradation and viscosity reduction of long chain hydrocarbons using Pseudomonas aeruginosa and Pseudomonas fluorescens

Sakthipriya

Doble

Sangwai

2016

Environ. Sci.: Processes Impacts

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The use of microorganisms has been researched extensively for possible applications related to hydrocarbon degradation in the petroleum industry. However, attempts to improve the effect of microorganisms on the viscosity of hydrocarbons, which find potential use in the development of robust models for biodegradation, have been rarely documented. This study investigates the degradation of long chain hydrocarbons, such as hexadecane and eicosane using Pseudomonas fluorescens PMMD3 (P. fluorescens) and Pseudomonas aeruginosa CPCL (P. aeruginosa). P. aeruginosa used here is isolated from petroleum contaminated sediments and the P. fluorescens is from the coastal area, and both have hydrocarbon degrading genes. The degradation of hydrocarbons is studied using carbon profiling and reduction in viscosity pre- and post-degradation of hydrocarbons. The carbon profiling has been obtained using gas chromatography-mass spectroscopy (GC-MS), and Fourier transform infrared spectrometer (FTIR) results. GC-MS results have indicated an improved biodegradation of hydrocarbons by 77-93% in one day. The yield coefficients of biomass (YX/S) for P. aeruginosa and P. fluorescens using hexadecane as a carbon source are 1.35 and 0.81 g g(-1), and the corresponding values with eicosane are 0.84 and 0.88 g g(-1). The viscosity of hexadecane is reduced by the order of 53 and 47%, while that of eicosane was reduced by 53 and 65%, using P. aeruginosa and P. fluorescens, respectively. This study also presents information on the activity of enzymes responsible for the hydrocarbon degradation. Pseudomonas species have shown their use in potential applications for bioremediation, oil-spill treatment, and flow assurance. We believe that this study will also provide stringent tests for possible model development for the bioremediation of long chain paraffins suitable for oilfield applications.

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“…Most of the EOR processes have an increased recovery to about 30-40% or more of the original oil in place (OOIP) as compared with just 15-40% recovery through primary and secondary methods (Sakthipriya et al 2015). Because of microscopic and macroscopic factors, about 60% of crude oil (OOIP) is left unswept in the reservoirs.…”

Section: Unswept Oil In the Low Permeable Reservoir Zonesmentioning

confidence: 99%