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Frontiers of Earth Science 2023年第1期17卷 218-229页

作者： Yang LI Shuheng TANG Jian CHEN songhang zhang School of Earth and Environment Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainan 232001China School of Energy Resource China University of GeosciencesBeijing 100083China Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism(Ministry of Education) Beijing 100083China Key Laboratory of Strategy Evaluation for Shale Gas(Ministry of Land and Resources) Beijing 100083China

Abundant unminable coal in deep strata and abandoned mines are also precious sources of clean gas energy,under which biotransformation is a potential *** recent years,substantial progress has been made in laboratory research on coal degradation to produce methane by microbial *** paper systematically reviews the research progress of microbial enhancement and microbial stimulation of coal,physicochemical pretreatments of coal,and environmental factors affecting coal *** research idea of coal biotransformation should aim at field production increase and gradually clarify the microbial mechanism of coal degradation and the regional distribution and functional composition of microbial communities on the block *** research on coal biotransformation helps improve the development level of coalbed methane and the sustainable development of unconventional natural gas resources.

关键词： coal biotransformation methanogens microbial mechanism in situ environment carbon cycle

Geochemical Characteristics and Development Significances of Constant and Trace Elements from Coalbed Methane Co-Produced Water:A Case Study of the Shizhuangnan Block,the Southern Qinshui Basin

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Journal of Earth Science 2024年第1期35卷 51-61页

作者： Yang Li Shuheng Tang Jian Chen songhang zhang Zhaodong Xi Key Laboratory of Universities in Anhui Province for Prevention of Mine Geological Disasters Anhui University of Science and TechnologyHuainan 232001China School of Earth and Environment Anhui University of Science and TechnologyHuainan 232001China National Key Laboratory of Petroleum Resources and Engineering China University of PetroleumBeijing 102249China School of Energy Resource China University of GeosciencesBeijing 100083China Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism Ministry of EducationBeijing 100083China Key Laboratory of Strategy Evaluation for Shale Gas Ministry of Land and ResourcesBeijing 100083China

As an unconventional natural gas resource,coalbed methane(CBM)development releases a large amount of CBM wells co-produced *** characteristics of the co-produced water provide an essential foundation for the production dynamics of CBM reservoirs if the impacts of fracturing fluids and other aquifers can be *** the Shizhuangnan Block of the southern Qinshui Basin,constant and trace elements in CBM co-produced water from the wellheads were collected and determined,which is applied to assess water source,fracturing fluid effect,and CBM *** on principle component analysis and hierarchical clustering analysis,the water samples are divided into four *** suggests that different characteristics affected by water-rock interaction,reservoir environment,aquifer recharge,and hydraulic fracturing result in the various ratios of Na^(+)/Cl^(-),alkalinity(HCO_(3)^(-)+CO_(3)^(2-))/Cl^(-)and other specific ***,Cl^(-)is selected as a dividing line for complete fracturing fluid flow back,associated with organic-bound chlorine complexes in the original coal seam *** to constant elements,there is a significant correlation between Li and Sr concentrations and CBM productivity,so templates regarding trace elements can be used to distinguish various sources of the co-produced water.

关键词： coalbad methane CBM co-produced water hydraulic fracturing Qinshui Basin

Methane adsorption-induced coal swelling measured with an optical method

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International Journal of Mining Science and Technology 2015年第6期25卷 949-953页

作者： Tang Shuheng Wan Yi Duan Lijiang Xia Zhaohui zhang songhang School of Energy Resources China University of Geosciences Asia-Pacific Department Petro China Research Institute of Petroleum Exploration & Development

In order to quantify the effect of matrix shrinkage on reservoir permeability during coalbed methane production, coal samples from Huozhou, Changzhi and Jincheng areas in Shanxi province （classified as high-volatile bituminous coal, low-volatile bituminous coal and anthracite, respectively） were collected, and adsorption-induced coal swelling in methane were determined by an optical method at 40 ℃ and pressure up to 12 MPa. All three coals showed similar behavior-that swelling increased as a function of pressure up to about 10 MPa but thereafter no further increase in swelling was observed. Swelling in the direction perpendicular to the bedding plane is greater than that parallel to the bedding plane, and the differences are about 7.77-8.33%. The maximum volumetric swelling ranges from 2.73% to 3.21 %-increasing with increasing coal rank. The swelling data can be described by a modified DR model. In addition, swelling increases with the amount of adsorption. However, the increase shows a relatively slower stage followed by a relatively faster stage instead of a linear increase. Based on the assumption that sorption-induced swelling/shrinkage of coal in methane is reversible, the permeability increases induced by coal shrinkage during methane desorption was analyzed, and the results indicate that the permeability change is larger for higher rank coal in the same unit of pressure depletion.

关键词： CoalAdsorptionMethaneSwellingPermeability

Evaluation of infill well pattern based on the dynamic change of reservoirs during coalbed methane development

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Frontiers of Earth Science 2023年第3期17卷 646-660页

作者： Qian zhang Shuheng TANGI songhang zhang Xinlu YAN Kaifeng WANG Tengfei JIA Zhizhen WANG School of Energy Resources China University of Geosciences(Beijing)Beijing 100083China Coal Reservoir Laboratory of National Engineering Research Center of CBM Development&Utilization Beijing 100083China Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering Beijing 100083China College of Mining Technology Taiyuan University of TechnologyTaiyuan 030024China

With the deepening of coalbed methane(CBM)exploration and development,the problem of low gas production has gradually become one of the main factors restricting the development of the CBM industry in *** well pattern deployment can improve the productivity of CBM wells and reduce the cost of production,while the reservoir changes of CBM wells play a important role for well pattern *** this study,the dynamic characteristics of the average reservoir pressure(ARP),permeability,and drainage radius during the development process of CBM wells are systematically analyzed,and predicted the production changes of well groups before and after infilling wells in combination with the characteristics of reservoir *** results show that the high gas production wells have a larger pressure drop,long drainage radius,and a large increase in *** the contrary,low gas production wells are characterized by small drainage radius,damaged permeability and difficult to *** productivity of infilled horizontal wells is predicted for two well groups with different productivity and reservoir dynamic *** infilling wells,the production of current wells has increased at different *** is predicted that the average gas production of low gas production well group H1 and middle gas production well group H2 will increase 1.64 and 2.09 times respectively after 3000 days production *** addition,the pressure interference between wells has increased significantly,and the overall gas production of the well group has greatly *** wells can achieve better development results in areas with superior CBM resources,recoverable reservoir permeability,and small drainage radius during the early production *** research results provide a reference for the later infill adjustment of CBM well patterns in the study area.

关键词： well pattern optimization reservoir dynamic variation infill well deployment coalbed methane Qinshui Basin

Paleoenvironment controls on organic matter accumulation in transitional shales from the eastern Ordos Basin,China

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Frontiers of Earth Science 2021年第4期15卷 737-753页

作者： Jianwei LV songhang zhang Ning YANG Chunbo FU Xinlu YAN Yang LI School of Energy Resources China University of GeosciencesBeijing 100083China Chinese Academy of Natural Resources Economics Beijing 101149China Huadian Coal Industry Group Co. Ltd.Beijing 100035China Second Oil Production Plant PetroChina Changqing Oilfield CompanyQingyang 745100China

To investigate the paleoenvironmental controls on organic matter accumulation of Upper Paleozoic shales in the eastern Ordos Basin,China,26 shale samples were collected from two wells drilled into the Shanxi and Taiyuan *** total organic carbon(TOC)content,mineral compositions and elemental geochemistry of the samples were ***(35.42%)and clay minerals(48.34%)are the dominant minerals and trace elements(Li,Cs,Cu,V,Co,and Cr)are commonly enriched in the shale samples compared to the Upper Continental Crust.C-values(ranging from 0.2 to 4.5),chemical indices of weathering(CIW)values(48.82 to 99.11),and Sr/Cu ratios(1.00 to 11.05)suggest that the paleoclimate was humid in the study area during the Late *** redox indices(e.g.,Al_(2)O_(3)/(Al_(2)O_(3)+Fe_(2)O_(3)),V/Cr,Ni/Co,V/(V+Ni)and U/Th)indicate a dysoxic to oxic paleoenvironment characterized by transi-tional sedimentary deposits in a continental margin *** addition,chemical index of alteration(CIA,ranging from 77.92%to 98.36%)and CIW(89.19%to 99.11%)values suggest that there was intense chemical weathering in the study area,while the Al_(2)O_(3)-CaO^(*)+Na_(2)O-K_(2)O(A-CN-K)ternary diagram demonstrates that the shales were not subjected to potassium metasomatism during ***_(2)O_(3)/TiO_(2)and TiO_(2)/Zr ratios,as well as REE characteristics suggest a felsic source rocks and discount seawater as an REE *** anomalies indicate an oxic environment with terrigenous input during black shale deposition,and LREE enrichment with negative Eu anomalies suggests that both shale formations were affected by detrital input rather than hydrothermal *** correlation of TOC(ranging from 1.10%to 6.39%,with an average of 2.77%)with trace elemental redox indices(Sr/Cu,Sr/Ba,V/Cr,and U/Th)indicates that a warm-humid,dysoxic to oxic environment preserved much of the organic matter.

关键词： Late Paleozoic shale geochemistry paleoenvironment eastern Ordos Basin

Prediction Model of Coal Reservoir Pressure and its Implication for the Law of Coal Reservoir Depressurization

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Acta Geologica Sinica(English Edition) 2019年第3期93卷 692-703页

作者： YAN Xinlu zhang songhang TANG Shuheng LI Zhongcheng WANG Kaifeng YI Yongxiang DANG Feng HU Qiuping School of Energy and Resources China University of GeoscienceBeijing 100083China MOE Key Lab of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism China University of GeoscienceBeijing 100083China Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering Beijing 100083China China United Coalbed Methane Corporation Ltd. Beijing 100011China

The main methods of coalbed methane(CBM)development are drainage and depressurization,and a precise prediction of coal reservoir pressure is thus crucial for the evaluation of reservoir potentials and the formulation of reasonable development *** work established a new reservoir pressure prediction model based on the material balance equation(MBE)of coal reservoir,which considers the self-regulating effects of coal reservoirs and the dynamic change of equivalent drainage area(EDA).According to the proposed model,the reservoir pressure can be predicted based on reservoir condition data and the actual production data of a single *** with traditional reservoir pressure prediction models which regard EDA as a fixed value,the proposed model can better predict the average pressure of ***,orthogonal experiments were designed to evaluate the sensitivity of reservoir parameters on the reservoir pressure prediction results of this proposed *** results show that the saturation of irreducible water is the most sensitive parameter,followed by Langmuir volume and reservoir porosity,and Langmuir pressure is the least sensitive *** addition,the pressure drop of reservoirs is negatively correlated with the saturation of irreducible water and the Langmuir volume,while it is positively correlated with *** work analyzed the reservoir pressure drop characteristics of the CBM wells in the Shizhuangnan Block of the Qinshui Basin,and the results show that the CBM reservoir depressurization can be divided into three types,i.e.,rapidly drop type,medium-term stability type,and slowly drop *** drainage features of wells were reasonably interpreted based on the comprehensive analysis of the reservoir depressurization type;the latter was coupled to the corresponding permeability dynamic change characteristics,eventually proving the applicability of the proposed model.

关键词： coalbed methane pressure prediction equivalent drainage area influencing factors pressure drop types Qinshui Basin

Geochemical Characteristics and Development Significances of Constant and Trace Elements from Coalbed Methane Co-produced Water: A Case Study of the Shizhuangnan Block， the Southern Qinshui Basin

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Journal of Earth Science 2022年

作者： Yang Li Shuheng Tang Jian Chen songhang zhang Zhaodong Xi School of Earth and Environment， Anhui University of Science and Technology State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines， Anhui University of Science & Technology School of Energy Resource， China University of Geosciences Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism， Ministry of Education Key Laboratory of Strategy Evaluation for Shale Gas， Ministry of Land and Resources

As an unconventional natural gas resource， coalbed methane （CBM） development releases a large amount of CBM wells co-produced water. Geochemical characteristics of the co-produced water provide an essential foundation for the production dynamics of CBM reservoirs if the impacts of fracturing fluids and other aquifers can be ignored. In the Shizhuangnan block of the southern Qinshui Basin， constant and trace elements in CBM co-produced water from the wellheads were collected and determined， which is applied to assess water source， fracturing fluid effect， and CBM production. Based on principle component analysis and hierarchical clustering analysis， the water samples are divided into four categories. It suggests that different characteristics affected by water-rock interaction， reservoir environment， aquifer recharge， and hydraulic fracturing result in the various ratios of Na+/Cl-， alkalinity (HCO3-+ CO32-)/Cl-and other specific rules. Moreover， Cl-is selected as a dividing line for complete fracturing fluid flow back， associated with organic-bound chlorine complexes in the original coal seam water. Compared to constant elements， there is a significant correlation between Li and Sr concentrations and CBM productivity， so templates regarding trace elements can be used to distinguish various sources of the co-produced water.

关键词：

不同排采程度煤储层注CO_(2)驱煤层气模拟评价

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煤炭学报 2022年第3期47卷 1275-1285页

作者：张松航唐书恒张守仁王敬宇中国地质大学(北京)能源学院北京100083 非常规天然气地质评价与开发工程北京市重点实验室北京100083 中联煤层气有限责任公司北京100015

在“双碳”战略背景下,开展煤中封存CO_(2)和提高煤层气采收率(CO_(2)-ECBM)研究有重要现实意义,我国也已开展多方位的先导性试验和工程示范。已有的工程实验表明,煤储层的排采程度对CO_(2)注入的难易程度有重要影响,然而还缺少定量数... 详细信息

在“双碳”战略背景下,开展煤中封存CO_(2)和提高煤层气采收率(CO_(2)-ECBM)研究有重要现实意义,我国也已开展多方位的先导性试验和工程示范。已有的工程实验表明,煤储层的排采程度对CO_(2)注入的难易程度有重要影响,然而还缺少定量数据的支撑以及对CO_(2)注入及驱煤层气的效果的评价。借助数值模拟手段,以沁水盆地柿庄北区块SX018-5H井煤层气地质和工程条件为基础,构建了含1口水平井和2口直井的3号煤层CO_(2)-ECBM工区,设计了水平井排采0,1,2,3和4 a后,在1 a内连续注入万吨CO_(2),以及排采4 a后持续注入CO_(2)共计6个注入驱替方案,对比了10 a模拟时间内注入CO_(2)各方案及不注入CO_(2)方案的气井产出和储层动态变化情况。研究结果表明,在沁水盆地南部柿庄北区块3号煤层地质条件下,水平井具有较高的CO_(2)注气效率,3号煤层具有较大的封存潜力,注入万吨CO_(2)主要封存在水平井筒(长700 m)附近60 m范围内;煤储层的排采程度,也就是注入CO_(2)前储层的含气/含水饱和度,对CO_(2)注入有重要影响,储层中甲烷排采越充分,越有利于CO_(2)注入;CO_(2)注入对邻近煤层气井的生产存在增加储层压力的“负”效应和驱替甲烷的“正”效应。要在CO_(2)-ECBM项目中达到较好的驱替效果,一方面应增加煤储层的排采程度,另一方面应适当降低CO_(2)注入井和煤层气生产井距。

关键词：煤储层 CO_(2)封存煤层气采收率储层压力水平井

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无烟煤中甲烷和二氧化碳混合气吸附运移规律

煤炭学报 2021年第2期46卷 544-555页

作者：张松航张守仁唐书恒信迪刘冰中国地质大学(北京)能源学院北京100083 非常规天然气地质评价与开发工程北京市重点实验室北京100083 中联煤层气有限责任公司北京100015

煤中CH_(4)和CO_(2)的运移和竞争吸附,是煤中CO_(2)封存和提高煤层气采收率(CO_(2)-ECBM)项目注入优化设计、注入驱替效果评价的重要依据。针对沁水盆地南部3个高阶煤样品开展了煤岩煤质、孔隙结构测试(低温液氮和二氧化碳吸附实验)和... 详细信息

煤中CH_(4)和CO_(2)的运移和竞争吸附,是煤中CO_(2)封存和提高煤层气采收率(CO_(2)-ECBM)项目注入优化设计、注入驱替效果评价的重要依据。针对沁水盆地南部3个高阶煤样品开展了煤岩煤质、孔隙结构测试(低温液氮和二氧化碳吸附实验)和纯甲烷、二氧化碳及其混合气(体积分数75%CH_(4)+25%CO_(2),50%CH_(4)+50%CO_(2),25%CH_(4)+75%CO_(2))吸附试验。基于混合气吸附相密度计算,分析了煤中混合气吸附的绝对吸附量和气体分离因子随压力的变化规律;同时采用双孔隙扩散模型计算了吸附实验中每个压力段气体的等效扩散系数和大孔扩散占比;最后研究了煤岩煤质和孔隙结构对煤中CH_(4),CO_(2)吸附运移和竞争吸附作用的影响。结果表明:①煤中超微孔比表面积较低温氮比表面积高1~2个数量级,是煤岩吸附的主要场所;②高阶煤气体吸附分离因子(S(CO_(2)-CH_(4)))随平衡压力和气体体积分数于3~20变化,一般随压力的升高而下降,与煤中微、小孔发育正相关;③双孔扩散模型可以较好的描述混合气体的扩散过程,总体上受基质膨胀效应影响煤样的大孔等效扩散率随压力升高呈幂函数降低,且在相同压力下,大孔等效扩散率随CO_(2)体积分数增加而增高。煤样的小孔等效扩散率与气体体积分数和压力关系不明显,大孔扩散占比随压力升高呈“V”型变化。项目成果有助于深入理解CH_(4)和CO_(2)的吸附解吸过程。

关键词：无烟煤 CO_(2)-ECBM 竞争吸附混合气扩散沁水盆地

湘西北下古生界海相页岩储层特征与含气性分析

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地学前缘 2016年第2期23卷 135-146页

作者：唐书恒范二平张松航姜文中国地质大学(北京)海相储层演化与油气富集机理教育部重点实验室北京100083 中国地质大学(北京)页岩气资源勘查与战略评价国土资源部重点实验室北京100083 中国地质科学院地质力学研究所北京100081 湖南省地质调查院湖南长沙410116

基于野外地质和钻井资料,结合相关实验测试结果,对湘西北地区下古生界海相页岩储层特征进行了深入研究,并探讨了页岩甲烷含气性及影响因素。结果表明：牛蹄塘组黑色页岩以深水陆棚-斜坡相沉积为主,厚度范围为50~250m;龙马溪组为闭塞海... 详细信息

基于野外地质和钻井资料,结合相关实验测试结果,对湘西北地区下古生界海相页岩储层特征进行了深入研究,并探讨了页岩甲烷含气性及影响因素。结果表明：牛蹄塘组黑色页岩以深水陆棚-斜坡相沉积为主,厚度范围为50~250m;龙马溪组为闭塞海湾沉积,底部黑色页岩发育。两组页岩有机质类型均属于Ⅰ型,有机碳含量平均为3.57%和1.16%,热演化程度较高,平均达2.61%和2.08%。受沉积环境和成岩作用影响,两组页岩均具有高石英、低黏土、少量碳酸盐矿物的组成特征。页岩储集空间可划分为3大类：矿物基质孔、有机质孔、微裂缝。受有机质和黏土矿物等因素影响,页岩内部孔隙结构参数各不同,但主体上孔径小于50nm的微孔和中孔提供了大部分比表面积和孔体积,为气体存储主要场所。牛蹄塘组页岩甲烷最大吸附量平均为1.98cm3/g;龙马溪组页岩甲烷最大吸附量较低,为1.16cm3/g。其中有机质与黏土矿物对页岩甲烷吸附量均有一定的贡献,而过高的成熟度和含水量可导致页岩吸附能力下降。

关键词：湘西北海相页岩储层特征孔隙结构吸附能力