Oil reservoir simulating bioreactors: tools for understanding petroleum microbiology

Rellegadla, Sandeep; Jain, Shikha; Agrawal, Akhil

doi:10.1007/s00253-019-10311-5

Cited by 13 publications

(5 citation statements)

References 97 publications

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“…For this experiment, the oil recovery plots were analyzed to draw comparative conclusions and select the polymer with the highest residual oil recovery efficiency. The use of ORSBs to assess the trends of oil recovery is a reliable method to interpret the effective EOR process . The experiment was conducted with 4 ORSBs, as indicated in Table S9.…”

Section: Resultsmentioning

confidence: 99%

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Wettability Alteration of the Oil-Wet Carbonate by Viscosity-Augmented Guar Galactomannan for Enhanced Oil Recovery

Rellegadla

Jain

Sangwai

et al. 2021

ACS Appl. Polym. Mater.

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The exhaustion of oil reserves encourages enhanced oil recovery (EOR) from mature oil fields. Hence, several polymers, surfactants, and nanofluids are developed, improving the recovery of additional oil from such mature wells. However, increased cost, harsh reservoir environment, and lower stability presents a significant challenge in developing a multicharacteristic injecting fluid, addressing all the past issues during oil recovery. Besides, almost all the earlier studies have demonstrated only higher viscosifying properties of polymers and rarely inspected the polymers' capabilities in altering surface wettability. In the present study, a guar galactomannan solution called viscosity-augmented guar (VAG) was prepared by the heat treatment of crude guar and removal of insoluble impurities. The resulting VAG solution demonstrated stable viscosity at higher temperatures (65 °C) under changing reservoir conditions. Additionally, the wettability alteration potential of VAG was evaluated by investigating the changes in the contact angle of oil-wet carbonate surfaces when treated with the VAG solution. Experimental results showed a reduction in the contact angle of the oil-wet surface to 81°after treatment with VAG from original surface values of 102°with the brine solution, indicating wetting transition from oil-wet to intermediate water-wet conditions. Moreover, the Fourier transform infrared spectroscopy and thermogravimetric analysis revealed the VAG's ability to displace oil components from the oil-wet surface. Additionally, emulsification studies showed a birefringence phenomenon of oil-water emulsions with VAG, reinforcing a proposed mechanism for wettability alteration by forming structured films oriented around the oil droplets in emulsions. The EOR potential of VAG showed an additional oil recovery of 7.31% of original oil in place compared to 3.59 and 2.98% by commercial polymers like xanthan gum (XGU) and partially hydrolyzed polyacrylamide, respectively. Overall, the favorable results of the VAG polymer are promising for promoting EOR, and for the first time, this study shows a polymer behavior in altering surface wettability of reservoir rocks and adds up different dimensions for future studies.

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Section: Resultsmentioning

confidence: 99%

“…The use of ORSBs to assess the trends of oil recovery is a reliable method to interpret the effective EOR process. 61 The experiment was conducted with 4 ORSBs, as indicated in Table S9. Initially, the syringe bioreactors were flooded with an ASB medium.…”

Section: Removal Of Adsorbed Crude Oilmentioning

confidence: 99%

Wettability Alteration of the Oil-Wet Carbonate by Viscosity-Augmented Guar Galactomannan for Enhanced Oil Recovery

Rellegadla

Jain

Sangwai

et al. 2021

ACS Appl. Polym. Mater.

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“…If an operator decides to reinject the water into the reservoir, it is treated for bacteria, with biocide. Bacteria can create integrity problems for assets and safety problems for personnel 9 . Salts and solid/rock particles can create flow problems causing strangulation within the tubes and pipes.…”

Section: Introductionmentioning

confidence: 99%

Sulphate-reducing bacterial community structure from produced water of the Periquito and Galo de Campina onshore oilfields in Brazil

Tiburcio

Macrae

Peixoto

et al. 2021

Sci Rep

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Sulphate-reducing bacteria (SRB) cause fouling, souring, corrosion and produce H2S during oil and gas production. Produced water obtained from Periquito (PQO) and Galo de Campina (GC) onshore oilfields in Brazil was investigated for SRB. Produced water with Postgate B, Postgate C and Baars media was incubated anaerobically for 20 days. DNA was extracted, 16S rDNA PCR amplified and fragments were sequenced using Illumina TruSeq. 4.2 million sequence reads were analysed and deposited at NCBI SAR accession number SRP149784. No significant differences in microbial community composition could be attributed to the different media but significant differences in the SRB were observed between the two oil fields. The dominant bacterial orders detected from both oilfields were Desulfovibrionales, Pseudomonadales and Enterobacteriales. The genus Pseudomonas was found predominantly in the GC oilfield and Pleomorphominas and Shewanella were features of the PQO oilfield. 11% and 7.6% of the sequences at GC and PQO were not classified at the genus level but could be partially identified at the order level. Relative abundances changed for Desulfovibrio from 29.8% at PQO to 16.1% at GC. Clostridium varied from 2.8% at PQO and 2.4% at GC. These data provide the first description of SRB from onshore produced water in Brazil and reinforce the importance of Desulfovibrionales, Pseudomonadales, and Enterobacteriales in produced water globally. Identifying potentially harmful microbes is an important first step in developing microbial solutions that prevent their proliferation.

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“…If an operator decides to reinject the water into the reservoir, it is treated for: bacteria, the presence of salts, and the potential generation/deposition of fouling materials. Bacteria can create integrity problems for assets and safety problems for personnel 5 . Salts and solids can create ow assurance problems causing strangulation within the tubes and pipes.…”

Section: Introductionmentioning

confidence: 99%

Desulfovibrio and Pseudomonas Dominated Enriched Produced Water Reinforcing their Importance in Oilfields and Production Processes

Tiburcio

Macrae

Peixoto

et al. 2020

Preprint

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Enrichment based isolation methods and molecular identification were used to investigate the microbial communities in produced water obtained from Periquito (PQO) and Galo de Campinas (GC) onshore oilfields in Brazil. Produced water was enriched with Postgate B, Postgate C and Baars media and incubated. DNA was extracted, PCR amplified and16S rDNA fragments were sequenced using Illumina TruSEq. 4.2 million reads were analysed and deposited at the Sequence Read Archive at NCBI. No significative differences in microbial community composition could be attributed to the enrichment but significant differences were observed from two oil fields. The dominant Bacterial Orders detected from both oilfields were Desulfovibrionales, Pseudomonadales and Enterobacteriales. Pseudomonas were found predominantly in Periquito oilfield (19.8%) with only 2,4% at Galo de Campinas. Pleomorphominas (3.76%) and Shewanella (4,69%) were exclusive to and possible biomarkers for the Periquito Oilfield. 11.05% and 7.62% of the sequences were not classified at genus level and detected at GC and P. Abundances changed for Desulfovibrio from P, 29.8% at PQO and 16.08% at GC. The Clostridium_sensu_stricto varied from 2.8% at PQO and 2.4% at GC). Pseudomonas were found predominantly in Periquito oilfield (19.8%) with only 2,4% at Galo de Campinas. Pleomorphominas (3.76%) and Shewanella (4,69%) were almost exclusive to and possible biomarkers for the Periquito Oilfield. These data provide a bacterial biodiversity benchmark for future produced water treatment and microbially enhanced oil recovery (MEOR).

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Oil reservoir simulating bioreactors: tools for understanding petroleum microbiology

Cited by 13 publications

References 97 publications

Wettability Alteration of the Oil-Wet Carbonate by Viscosity-Augmented Guar Galactomannan for Enhanced Oil Recovery

Wettability Alteration of the Oil-Wet Carbonate by Viscosity-Augmented Guar Galactomannan for Enhanced Oil Recovery

Sulphate-reducing bacterial community structure from produced water of the Periquito and Galo de Campina onshore oilfields in Brazil

Desulfovibrio and Pseudomonas Dominated Enriched Produced Water Reinforcing their Importance in Oilfields and Production Processes

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