Factors influencing biogenic gas production of low-rank coal beds in the Jiergalangtu Sag, Erlian Basin

Chen, Hao; Qin, Yong; Deng, Ze; Geng, Meng; Li, Guizhong; Sang, Guangjie; Xia, Daping

doi:10.1016/j.ngib.2019.01.001

Cited by 7 publications

(6 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While an excess of available TEs could be toxic, insufficient TEs could be limiting factors for microbial function (Chen et al ., 2019, 101 ). Our results demonstrated that amendments of Co, Cu, and Mo significantly enhanced methane production suggesting the strategic addition of in situ TE amendments as a promising approach to stimulate CBM wells to higher productivity.…”

Section: Discussionmentioning

confidence: 99%

Selective trace elements significantly enhanced methane production in coal bed methane systems by stimulating microbial activity

Chin,

Ünal,

Sanderson

et al. 2024

Microbiol Spectr

View full text Add to dashboard Cite

Trace elements are associated with the microbial degradation of organic matter and methanogenesis, as enzymes in metabolic pathways often employ trace elements as essential cofactors. However, only a few studies investigated the effects of trace elements on the metabolic activity of microbial communities associated with biogenic coalbed methane production. We aimed to determine the effects of strategically selected trace elements on structure and function of active bacterial and methanogenic communities to stimulate methane production in subsurface coalbeds. Microcosms were established with produced water and coal from coalbed methane wells located in the Powder River Basin, Wyoming, USA. In initial pilot experiments with eight different trace elements, individual amendments of Co, Cu, and Mo lead to significantly higher methane production. Transcript levels of mcrA , the key marker gene for methanogenesis, positively correlated with increased methane production. Phylogenetic analysis of the mcrA cDNA library demonstrated compositional shifts of the active methanogenic community and increase of their diversity, particularly of hydrogenotrophic methanogens. High-throughput sequencing of cDNA obtained from 16S rRNA demonstrated active and abundant bacterial groups in response to trace element amendments. Active Acetobacterium members increased in response to Co, Cu, and Mo additions. The findings of this study yield new insights into the importance of essential trace elements on the metabolic activity of microbial communities involved in subsurface coalbed methane and provide a better understanding of how microbial community composition is shaped by trace elements. IMPORTANCE Microbial life in the deep subsurface of coal beds is limited by nutrient replenishment. While coal bed microbial communities are surrounded by carbon sources, we hypothesized that other nutrients such as trace elements needed as cofactors for enzymes are missing. Amendment of selected trace elements resulted in compositional shifts of the active methanogenic and bacterial communities and correlated with higher transcript levels of mcrA . The findings of this study yield new insights to not only identify possible limitations of microbes by replenishment of trace elements within their specific hydrological placement but also into the importance of essential trace elements for the metabolic activity of microbial communities involved in subsurface coalbed methane production and provides a better understanding of how microbial community composition is shaped by trace elements. Furthermore, this finding might help to revive already spent coal bed methane well systems with the ultimate goal to stimulate methane production.

show abstract

Section: Discussionmentioning

confidence: 99%

Selective trace elements significantly enhanced methane production in coal bed methane systems by stimulating microbial activity

Chin,

Ünal,

Sanderson

et al. 2024

Microbiol Spectr

View full text Add to dashboard Cite

show abstract

“…Hydrogeology tends to affect CBM generation, migration and accumulation, especially for the enrichment of low-rank CBM (Ayers, 2002;Flores et al, 2008;Yao et al, 2014). For low-rank CBM, weak runoff hydrodynamics could not only be conducive to CBM preservation but also favorable for biogas generation (Beaton et al, 2006;Chen H et al, 2019;Fu et al, 2016). The sandstone pore-confined aquifers interbedded with the main coal seams directly influence CBM enrichment.…”

Section: Cbm Accumulation and Its Controlling Factorsmentioning

confidence: 99%

“…Previous research in the Erlian Basin has primarily focused on the structural and sedimentary geological characteristics of coal-bearing strata (Bonnetti et al, 2014;Ding et al, 2015) and on the CBM genetic types, biogas generation influencing factors, nanopore structure characteristics and feasibility studies of biogas recovery in the Jiergalangtu sag (Chen H et al, 2019;Sun B et al, 2018;Sun F et al, 2017;Sun QP et al, 2018;Tao JJ et al, 2019;Zhao et al, 2021). The Bayanhua sag is the key sag with low-rank CBM exploration potential in the Erlian Basin.…”

Section: Introductionmentioning

confidence: 99%

Coalbed methane geology and exploration potential in large, thick, low-rank seams in the Bayanhua Sag of the Erlian Basin, northern China

Tang

Tao

et al. 2022

Energy Exploration & Exploitation

View full text Add to dashboard Cite

The Erlian Basin may be one of the most promising areas for low-rank coalbed methane (CBM) in China. The Cretaceous coal-bearing strata in the Bayanhua sag contain abundant low-rank CBM resources with suitable depths and large coal thicknesses (1.00–78.85 m, avg.22.53 m). However, the research on CBM geology and exploration potential is still lacking, which severely hinders its exploration and development. This paper presents an integrated study of CBM geology in terms of gas reservoir properties, gas-bearing characteristics and controlling factors. The results of the analysis show that lignite and subbituminous coals are the main coal types present in the study area, with medium porosity (7.3–27.8%, avg.20.77%) and low permeability (0.05–21.8 mD, avg.5.54 mD) being dominant. The pores are dominantly transition pores with inkpot shapes, which is beneficial to the adsorption of CBM. The gas content of the coal seams is 1.66–4.45 m3/t and most coal reservoirs are oversaturated. The CBM is primarily of secondary microbial origin, mostly carbon dioxide reduction. The accumulation of CBM is mainly influenced by the structure type, roof lithology and hydrogeology in the study area. According to the integrated analysis of the vertical changes in the physical properties and gas-bearing characteristics, the dominant horizon tends to be the No. 6-7 coal seam, followed by the No. 6-4 coal seam. Based upon the CBM geology and the factors controlling enrichment, the prospecting potential in the Bayanhua sag was appraised, and two favorable areas are proposed for CBM exploitation.

show abstract

“…The results showed that both aceticlastic and hydrotrophic methanogenesis were detected in the coal and coalbed water (Sun et al, 2018). Previous studies have explored the methane production potential (Lai et al, 2020) and influencing factors (Chen et al, 2018) of coalbed organisms in the Erlian Basin. However, the above studies were based on simulation experiments, and cannot reflect the remodeling of microbial community structure that occurs through real environmental changes.…”

Section: Introductionmentioning

confidence: 99%

Seasonal variation of microbial community and methane metabolism in coalbed water in the Erlian Basin, China

Lai²,

Zhou³

et al. 2023

Front. Microbiol.

View full text Add to dashboard Cite

Coalbed water is a semi-open system connecting underground coalbeds with the external environment. Microorganisms in coalbed water play an important role in coal biogasification and the carbon cycle. The community assemblages of microorganisms in such a dynamic system are not well understood. Here, we used high-throughput sequencing and metagenomic analysis to investigate microbial community structure and identify the potential functional microorganisms involved in methane metabolism in coalbed water in the Erlian Basin, a preferred low-rank coal bed methane (CBM) exploration and research area in China. The results showed that there were differences in the responses of bacteria and archaea to seasonal variation. Bacterial community structure was affected by seasonal variation but archaea was not. Methane oxidation metabolism dominated by Methylomonas and methanogenesis metabolism dominated by Methanobacterium may exist simultaneously in coalbed water.

show abstract

Factors influencing biogenic gas production of low-rank coal beds in the Jiergalangtu Sag, Erlian Basin

Cited by 7 publications

References 16 publications

Selective trace elements significantly enhanced methane production in coal bed methane systems by stimulating microbial activity

Selective trace elements significantly enhanced methane production in coal bed methane systems by stimulating microbial activity

Coalbed methane geology and exploration potential in large, thick, low-rank seams in the Bayanhua Sag of the Erlian Basin, northern China

Seasonal variation of microbial community and methane metabolism in coalbed water in the Erlian Basin, China

Contact Info

Product

Resources

About