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| Characteristics of dissolved inorganic carbon in produced water from coalbed methane wells and its geological significance |
| YANG Zhaobiao1,2, QIN Yong1,2, QIN Zonghao1,2, YI Tongsheng3, LI Cunlei1,2, ZHANG Zhengguang1,2 |
1. Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou 221008, China;
2. School of Resource and Geosciences, China University of Mining and Technology, Xuzhou 221116, China;
3. Guizhou Research Center of Shale Gas and CBM Engineering Technology, Guiyang 550009, China |
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Abstract Based on long-term dynamic tracing of dissolved inorganic carbon (DIC) and stable carbon isotope (δ13CDIC) in produced water from 20 coalbed methane (CBM) wells in western Guizhou, the spatial-temporal dynamic variations of δ13CDIC of the GP well group produced in multi-layer commingled manner were analyzed, and the relationship between the value of δ13CDIC and CBM productivity was examined. The produced water samples of typical wells in the GP well group were amplified and sequenced using 16S rDNA, and a geological response model of δ13CDIC in produced water from CBM wells with multi-coal seams was put forward. The research shows that: δ13CDIC in produced water from medium-rank coal seams commonly show positive anomalies, the produced water contains more than 15 species of methanogens, and Methanobacterium is the dominant genus. The dominant methanogens sequence numbers in the produced water are positively correlated with δ13CDIC, and the positive anomaly of δ13CDIC is caused by reduction of methanogens, and especially hydrogenotrophic methanogens. Vertical segmentation of sedimentary facies and lithology in stratum with multi-coal seams will result in permeability and water cut segmentation, which will lead to the segmentation of δ13CDIC and archaea community in produced water, so in the strata with better permeability and high water cut, the δ13CDIC of the produced water is abnormally enriched, and the dominant archaea is mainly Methanobacterium. In the strata with weak permeability and low water cut, the δ13CDIC of the produced water is small, and the microbial action is weak. The shallow layer close to the coal seam outcrop is likely to be affected by meteoric precipitation, so the δ13CDIC of the produced water is smaller. The geological response model of δ13CDIC in produced water from multi-coal seams CBM wells in the medium-rank coal reveals the geological mechanism and microbial action mechanism of the δ13CDIC difference in the produced water from the multi-coal seams CBM wells. It also provides effective geochemical evidence for the superimposed fluid system controlled by sedimentary facies, and can also be used for the contribution analysis of the produced gas and water by the multi-layer CBM wells.
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Received: 09 October 2019
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[1] TOBIAS C, BÖHLKE J K. Biological and geochemical controls on diel dissolved inorganic carbon cycling in a low-order agricultural stream: Implications for reach scales and beyond[J]. Chemical Geology, 2011, 283: 18-30.
[2] WANG J, ZHANG C, PEI J, et al.Diel changes of dissolved inorganic carbon and calcite precipitation in a typical karst spring-fed stream[J]. Earth and Environment, 2015, 43(4): 395-402.
[3] JENNIFER M J, ANNA M, STEVEN P, et al.Biogeochemistry of the Forest City Basin coalbed methane play[J]. International Journal of Coal Geology, 2008, 76: 111-118.
[4] SHARMA S, FROST C.An innovative approach for tracing coalbed natural gas co-produced water using stable isotopes of carbon and hydrogen[J]. Groundwater, 2008, 46(2): 329-334.
[5] MCLAUGHLIN J F, FROST C, SHARMA S.Geochemical analysis of Atlantic Rim water, Carbon County, Wyoming: New applications for characterizing coal bed natural gas reservoirs[J]. AAPG Bulletin, 2011, 95(2): 191-217.
[6] SHARMA S, MULDER M L, SACK A, et al. Isotope approach to assess hydrologic connections during Marcellus shale drilling[EB/OL]. [2020-02-20]. https://ngwa.onlinelibrary.wiley.com/doi/abs/10.1111/ gwat.12083.
[7] LI Y, SHI W, TANG S H.Microbial geochemical characteristics of the coalbed methane in the Shizhuangnan block of Qinshui Basin, North China and their geological implications[J]. Acta Geologica Sinica-English Edition, 2019, 93: 660-674.
[8] SUZANNE D G, CHRIS J B, JOAN S E.Stable isotope geochemistry of coal bed and shale gas and related production waters: A review[J]. International Journal of Coal Geology, 2013, 120: 24-40.
[9] QUILLINAN S A, FROST C D.Carbon isotope characterization of powder river basin coal bed waters: Key to minimizing unnecessary water production and implications for exploration and production of biogenic gas[J]. International Journal of Coal Geology, 2014, 126: 106-119.
[10] ZHANG S H, TANG S H, LI Z C, et al.Stable isotope characteristics of CBM co-produced water and implications for CBM development: The example of the Shizhuangnan block in the southern Qinshui Basin, China[J]. Journal of Natural Gas Science and Engineering, 2015, 27(P3): 1400-1411.
[11] QIN Y, MOORE T A, SHEN J, et al.Resources and geology of coalbed methane in China: A review[J]. International Geology Review, 2018, 60(5/6): 777-812.
[12] 杨兆彪, 张争光, 秦勇, 等. 多煤层条件下煤层气开发产层组合优化方法[J]. 石油勘探与开发, 2018, 45(2): 297-304.
YANG Zhaobiao, ZHANG Zhengguang, QIN Yong, et al.Optimization methods of production layer combination for coalbed methane development in multi-coal seams[J]. Petroleum Exploration and Development, 2018, 45(2): 297-304.
[13] 杨兆彪, 李洋阳, 秦勇, 等. 煤层气多层合采开发单元划分及有利区评价[J]. 石油勘探与开发, 2019, 46(3): 559-568.
YANG Zhaobiao, LI Yangyang, QIN Yong, et al.Development unit division and favorable area evaluation for joint mining coalbed methane[J]. Petroleum Exploration and Development, 2019, 46(3): 559-568.
[14] ATEKWANA E A, KRISHNAMURTHY R V.Seasonal variations of dissolved inorganic carbon and δ13C of surface waters: Application of a modified gas evolution technique[J]. Journal of Hydrology, 1998, 205(3/4): 265-278.
[15] 中国国家质量监督检验检疫总局. 质谱分析方法通则: GB/T 6041—2002[S]. 北京: 中国标准出版社, 2002.
General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China. General rules for mass spectrometric analysis: GB/T 6041—2002[S]. Beijing: Standards Press of China, 2002.
[16] 中国国家标准化管理委员会. 天然气的组成分析气相色谱法: GB/T 13610—2014[S]. 北京: 中国标准出版社, 2014.
Standardization Administration of the People’s Republic of China. Analysis of natural gas composition gas chromatography: GB/T 13610—2014[S]. Beijing: Standards Press of China, 2014.
[17] LEMAY T G, KONHAUSER K O.Water chemistry of coalbed methane reservoirs[M]. Alberta: Alberta Energy and Utilities Board, 2006.
[18] WOLTEMATE I, WHITICAR M J, SCHOELL M.Carbon and hydrogen isotopic composition of bacterial methane in a shallow freshwater lake[J]. Limnology and Oceanography, 1984, 29(5): 985-992.
[19] SCOTT A R, KAISER W R, AYERS W B.Thermogenic and secondary biogenic gases San Juan Basin, Colorado and New Mexico-Implications for coalbed gas producibility[J]. AAPG Bulletin, 1994, 78(8): 1186-1209.
[20] WU C, YANG Z, QIN Y, et al.Characteristics of hydrogen and oxygen isotopes in produced water and productivity response of coalbed methane wells in Western Guizhou[J]. Energy & Fuels, 2018, 32(11): 11203-11211.
[21] SCOTT A R.Composition and origin of coal gases from selected basins in the United States[R]. Tuscaloosa: 1993 International Coalbed Methane Symposium, 1993.
[22] 刘文汇, 徐永昌. 煤型气碳同位素演化二阶段分馏模式及机理[J]. 地球化学, 1999, 28(4): 359-366.
LIU Wenhui, XU Yongchang.A two-stage model of carbon isotopic fractionation in coal-gas[J]. Geochimica, 1999, 28(4): 359-366.
[23] GOCIC M, TRAJKOVIC S.Analysis of changes in meteorological variables using Mann-Kendall and Sen’s slope estimator statistical tests in Serbia[J]. Global and Planetary Change, 2013, 100: 172-182.
[24] YANG Z B, QIN Y, WU C C, et al.Geochemical response of produced water in the CBM well group with multiple coal seams and its geological significance: A case study of Songhe well group in Western Guizhou[J]. International Journal of Coal Geology, 2019, 207: 39-51.
[25] WHITICAR M J, FABER E, SCHOELL M.Biogenic methane formation in marine and freshwater environments: CO2, reduction vs. acetate fermentation: Isotope evidence[J]. Geochimica et Cosmochimica Acta, 1986, 50(5): 693-709.
[26] SHIMIZU S, AKIYAMA M, NAGANUMA T, et al.Molecular characterization of microbial communities in deep coal seam groundwater of northern Japan[J]. Geobiology, 2007, 5(4): 423-33.
[27] LI D, HENDRY P, FAIZ M.A survey of the microbial populations in some Australian coalbed methane reservoirs[J]. International Journal of Coal Geology, 2008, 76: 14-24.
[28] STRAPOC D, PICARDAL F W, TURICH C, et al.Methane-producing microbial community in a coal bed of the Illinois Basin[J]. Applied and Environmental Microbiology, 2008, 74(8): 2424-2432.
[29] KLEIN D A, FLORES R M, VENOT C, et al.Molecular sequences derived from Paleocene Fort Union Formation coals vs. associated produced waters: Implications for CBM regeneration[J]. International Journal of Coal Geology, 2008, 76: 3-13.
[30] FRY J C, HORSFIELD B, SYKES R, et al.Prokaryotic populations and activities in an interbedded coal deposit, including a previously deeply buried section(1.6-2.3 km) above 150 Ma basement rock[J]. Geomicrobiol Journal, 2009, 26: 163-178.
[31] PENNER T J, FOGHT J M, BUDWILL K.Microbial diversity of western Canadian subsurface coal beds and methanogenic coal enrichment cultures[J]. International Journal of Coal Geology, 2010, 82: 81-93.
[32] GUO H, LIU R, YU Z, et al. Pyrosequencing reveals the dominance of methylotrophic methanogenesis in a coal bed methane reservoir associated with Eastern Ordos Basin in China[J]. International Journal of Coal Geology, 2012, 93: 56-61.
[33] GUO H, GAO Z, XIA D, et al.Biological methanation of coal in various atmospheres containing CO2[J]. Fuel, 2019, 242: 334-342.
[34] KIRK M F, MARTINI A M, BREECKER D O, et al.Impact of commercial natural gas production on geochemistry and microbiology in a shale-gas reservoir[J]. Chemical Geology, 2012, 332-333: 15-25. |
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