Microbiomes in Zhansan area, Shengli Oilfield, Shandong Province, China

Zhang, Wei; Xiao-li, HU; Qiu, Xuan; Liu, Deng; Feng, Liang; Ma, Liyuan; Hu, Jing; Wang, Hongmei

doi:10.1360/n972019-00135

Cited by 3 publications

(3 citation statements)

References 19 publications

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“…In addition, when injecting consortium bacteria on site, there will be competition with the in situ microbial community [51]. However, the bacteria used in this study were screened from the same layer, which is not prone to exclusion, but may alter the community structure in the reservoir.…”

Section: The Potential Environmental Impact Of Consortium Bacteriamentioning

confidence: 99%

Pore- and Core-Scale Recovery Performance of Consortium Bacteria from Low-Permeability Reservoir

Bian,

Song,

Zhi

et al. 2023

Microorganisms

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Performance evaluation of microorganisms that have emulsifying and degrading effects on crude oil has been extensively conducted in the laboratory. However, the ultimate goal of microbial enhanced oil recovery is field application, so the pilot simulation experiments are crucial. In this study, a micro-visualization model and the real cores were chosen to investigate the actual recovery efficiency and the mechanism of the consortium bacteria B-ALL, which has been proven to have good emulsification and degradation effects in lab studies in porous media. At the same time, the cast thin sections and rate-controlled porosimetry were combined to analyze the pore throat structure of the displacement core. It was found that the recovery efficiency was positively correlated with the microbial injection volume as well as the incubation time. For the microscopic model with high pores and high permeability, the efficiency of secondary water flooding can be increased by 44.77% after six days of incubation with two pore volume microbes. For the real tight cores, the maximum secondary water flooding efficiency under the same condition was 6.98%. Through visual modeling, microorganisms increase the oil washing efficiency mainly by emulsification and changing the wettability. The generated oil droplets will play a role in plugging and improving the wave efficiency. However, tight reservoirs have the characteristics of large pores and small throats, and curved and necking throats are developed, greatly reducing permeability. The microbial recovery efficiency was lower under shorter cultivation times. This study provides a practical basis for the application of consortium bacteria in tight oil fields to enhance recovery.

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Section: The Potential Environmental Impact Of Consortium Bacteriamentioning

confidence: 99%

Pore- and Core-Scale Recovery Performance of Consortium Bacteria from Low-Permeability Reservoir

Bian,

Song,

Zhi

et al. 2023

Microorganisms

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“…Furthermore, improper irrigation resulted in the removal of products of Na + , K + and Mg 2+ from the plant root zone entering the soil solution as ions accompanying the leaching nitrate (Yan et al, 2020). A field experiment conducted in 2010 illustrated that flooding irrigation was the main reason for orchard soil acidification in the area of eastern Shandong province (Wang et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Effects of lateral depth and emitter discharge rate on pH and nitrogen distributions in the wetted‐soil volume using drip fertigation

Qiu

Sun

Hou

et al. 2023

Irrigation and Drainage

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Accelerated soil acidification from excessive nitrogen fertilizer use and unreasonable irrigation has seriously increased. The advantages of saving water and fertilizer make drip irrigation feasible for reducing soil acidification. However, it is still unknown how drip irrigation influences the distribution of pH in the soil. Experiments were conducted in 30 wedge-shaped plexiglass containers to study the transformation of nitrogen and the distribution of pH in the soil profile under subsurface drip irrigation. The apparent cylindrical water application rate varied from 4.8 to 12 L, the emitter discharge rate varied from 1.8 to 5.5 L/h, and the lateral depth ranged from 0 to 20 cm. Ten days after irrigation ended, a lateral depth of 20 cm noticeably reduced soil pH at a depth of 10-40 cm, while the pH at a shallow lateral depth decreased in the topsoil; similarly, an emitter discharge rate of 1.8 L/h significantly decreased soil pH at a depth of 0-40 cm, while the pH with a greater emitter discharge rate was slightly decreased in the topsoil. Furthermore, an increase in the application rate resulted in an increase in the area of pH decrease in the soil at 10 days after irrigation ended. Additionally, the growing nitrogen application rate significantly increased the nitrogen content in the soil profile, and the potential risk of deep-soil pH declined. To reduce NO 3 -N leaching and avoid deep-soil acidification, a dripline depth of 10 cm with a minor irrigation level and nitrogen application rate through an emitter discharge rate of 3.2 L/h may be suggested.

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“…Previous scholars have provided some understanding of petroleum microbial communities. According to Qi et al [20], Ma et al [21], and Zhang et al [22], petroleum microorganisms mainly include hydrocarbon-oxidizing bacteria, saprophytic bacteria, anaerobic bacteria, etc. To achieve the goal of extraction, various microorganisms modify the properties of crude oil and reservoirs through processes such as emulsification, degradation, plugging, and others.…”

Section: Introductionmentioning

confidence: 99%

Horizontal and Vertical Comparison of Microbial Community Structures in a Low Permeability Reservoir at the Local Scale

Zhi,

Bian,

Chen

et al. 2023

Microorganisms

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Petroleum microorganisms play a crucial role in the application of microbial-enhanced oil recovery, and the community structures of petroleum microorganisms have been widely studied. Due to variations in reservoir geological conditions, reservoir microbial communities exhibit unique characteristics. However, previous studies have primarily focused on microbial community changes within a single well, a single block, and before and after water flooding, and thus, cross-horizon and cross-regional comparative studies of in situ microbial communities are lacking. In this study, the 16S rRNA full-length sequencing method was adopted to study bacterial communities in crude oil samples taken from two wells at the same depths (depths of 2425 m and 2412 m) but approximately 20 km apart in the Hujianshan oilfield, located in the Ordos Basin. At the same time, the results were combined with another layer of research data from another article (from a depth of 2140 m). The aim was to compare the differences in the microbial community structures between the oil wells on a horizontal scale and a vertical scale. The results revealed that there were minimal differences in the microbial community structures that were influenced by the horizontal distances within a small range (<20 km), while differences were observed at a larger spatial scale. However, the dominant bacteria (Proteobacteria and Bacteroidetes) in the different oilfields were similar. Vertical depth variations (>300 m) had significant impacts on the communities, and this was mainly controlled by temperature. The greater the depth, the higher formation temperature, leading to an increase in thermophilic and anaerobic bacteria within a community.

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Microbiomes in Zhansan area, Shengli Oilfield, Shandong Province, China

Cited by 3 publications

References 19 publications

Pore- and Core-Scale Recovery Performance of Consortium Bacteria from Low-Permeability Reservoir

Pore- and Core-Scale Recovery Performance of Consortium Bacteria from Low-Permeability Reservoir

Effects of lateral depth and emitter discharge rate on pH and nitrogen distributions in the wetted‐soil volume using drip fertigation

Horizontal and Vertical Comparison of Microbial Community Structures in a Low Permeability Reservoir at the Local Scale

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