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Estimation of correction coefficients for measured coal bed methane contents

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International Journal of Mining Science and Technology 2012年第4期22卷 493-497页

作者： Lei Bo fu xuehai Zhou Baoyan Shen Jia ZOU Mingjun Feng Qing School of Resource and Earth Science China University of Mining&TechnologyXuzhou 221008China Key Laboratory of CBM Resource and Reservoir-generating Process Ministry of EducationXuzhou 221008China Shanxi Bureau of Coal Geological Exploration Taiyuan 030006China

Improving the accuracy and precision of coal bed methane(CBM) estimates requires correction of older data from older coal exploration surveys to newer *** methods,the depth gradient method,the contour aerial weight method,and the well-point aerial weight method,were used to estimate the correction coefficient required to predict CBM gas content from coal exploration *** data from the Nos.3 and 15 coal seams provided the coal exploration data while the CBM exploration stages within the X1 well block located in the southern part of the Qinshui Basin provided the data obtained using newer *** results show the correction coefficients obtained from the two aerial weight methods are similar in value but lower than the one obtained from the depth gradient *** three methods provide similar results for the Nos.3 and 15 seams in that the correction factor is lower for the former *** results from the depth gradient method taken together with the coal seam burial depth and the coal rank suggest that variations in the correction factor increase linearly along with coal seam burial depth and coal *** correlation obtained can be applied to exploration and the evaluation of coal bed gas resources located in coalfields.

关键词：煤层甲烷校正系数甲烷含量煤层埋藏深度煤层气资源勘探数据估算测量

Current Status of the Research on Coal Geology in China

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Acta Geologica Sinica(English Edition) 2016年第4期90卷 1284-1297页

作者： WANG Tong WANG Qingwei SHAO Longyi XIA Yucheng fu xuehai NING Shuzheng XIE Zhiqing JIANG Tao China National Administration of Coal Geology Beijing 100039China College of Resources and Environment North China University of Water Resources and Electric PowerZhengzhou 450046China College of Geoscience and Surveying Engineering China University of Mining and Technology(Beijing)Beijing 100083China Xi'an University of Science and Technology Xi'an 710054China China University of Mining and Technology Xuzhou 221008China

Coal is the main energy in China, which has already played and will continue to play an important role in the national economy. Coal geology, as a practical science, has an access to gradual development with the growth and prosperity of China. From the meaning of the coalfield geology, this paper introduces the research progress and status of coalfield geology, including the research on coal basin, stratigraphy of coal-bearing stratigraphic sequences, coal-forming process, structural geology of coalfields, and exploration and development status of coal resources. The paper specially focuses on coal-forming process, including coal formation in terrestrial facies and transgressive / regression events, and introduces new technology which has been applied to research progress in structural geology of coalfield. This paper puts forward a new comprehensive exploration system for coal exploration and reviews regional coal geological exploration results in recent years, such as coal-poor regions of seven provinces in southern China and the coal resources area in northwest China, which will be an important coal-producing area in the future .

关键词： coal resource distribution exploration and exploitation new thought

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煤储层渗透率测试、模拟与预测研究进展

煤炭学报 2022年第6期47卷 2369-2385页

作者：傅雪海齐琦程鸣张宝鑫中国矿业大学煤层气资源与成藏过程教育部重点实验室江苏徐州221116 国家煤层气产品质量监督检验中心(山西) 山西晋城048000

渗透率是煤层气开发的重要参数,煤储层较强的非均质性使得现场少量试井结果难以反映区域性渗透率规律,不同仪器、方法、样品尺寸、压力、温度及介质条件下获得的实验渗透率对比性也较差。对比分析了不同试井方法(钻杆测试、水罐测试、... 详细信息

渗透率是煤层气开发的重要参数,煤储层较强的非均质性使得现场少量试井结果难以反映区域性渗透率规律,不同仪器、方法、样品尺寸、压力、温度及介质条件下获得的实验渗透率对比性也较差。对比分析了不同试井方法(钻杆测试、水罐测试、段塞测试、注入/压降测试)、不同实验测试方法(稳态法、非稳态法)的优缺点、适用条件及渗透率测试标准的演化历程,系统评述了单轴应变条件、恒定体积条件以及三轴应力条件下渗透率模拟模型的适用性,分析了基于裂隙、煤体结构、地应力、构造曲率等单一主控因素预测渗透率及人工智能(BP神经网络、灰色关联分析、支持向量回归机、多层次模糊综合评价)多因素预测的可靠性,总结了煤储层渗透率在测试、模拟和预测方面存在的问题,并提出了进一步研究的展望。研究结果表明现场注入测试是获取原位煤储层渗透率的主要方法,实验室非稳态法渗透率测试适合我国低渗煤储层;单轴应变条件下的P-M模型和S-D模型适用于恒定垂直外部应力条件下的模拟,恒定体积条件下的Ma模型对于多数煤类输入的参数均可测量,模拟结果可靠性较高,三轴应力条件下的Connell模型和Zhou模型更有利于通过实验室测定对模拟渗透率进行验证;基于煤层气井生产数据历史拟合得到的渗透率与原位煤储层更为接近,未进行煤层气排采试验区基于单一主控因素的煤储层渗透率预测效果较好,综合多因素的人工智能技术预测的渗透率较可靠。

关键词：煤层气渗透率测试与预测方法模拟条件研究进展

A review on transport of coal seam gas and its impact on coalbed methane recovery

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Frontiers of Chemical Science and Engineering 2011年第2期5卷 139-161页

作者： Geoff G.X.WANG Xiaodong ZHANG Xiaorong WEI xuehai fu Bo JIANG Yong QIN School of Chemical Engineering the University of QueenslandBrisbaneQld 4072Australia School of Resources&Environment Henan Polytechnic UniversityJiaozuo 454000China School of Resource and Geosciences China University of Mining and TechnologyXuzhou 221008China Key Laboratory of CBM Resources and Dynamic Accumulation Process Ministry of Education of ChinaXuzhou 221008China

This paper presents a summary review on mass transport of coal seam gas(CSG)in coal associated with the coalbed methane(CBM)and CO_(2) geo-sequestration enhanced CBM(CO_(2)-ECBM)recovery and current research advances in order to provide general knowledge and fundamental understanding of the CBM/ECBM processes for improved CBM *** will discuss the major aspects of theory and technology for evaluation and development of CBM resources,including the gas storage andﬂow mechanism in CBM reservoirs in terms of their differences with conventional natural gas reservoirs,and their impact on CBM production *** paper summarizes the evaluation procedure and methodologies used for CBM exploration and exploitation with some recommendations.

关键词： mass transport coal seam gas(CSG) coalbed methane(CBM) coal CBM recovery carbon dioxide storage

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无烟煤各向异性吸附膨胀动态响应实验研究

煤矿安全 2022年第4期53卷 1-6,12页

作者：赵楷棣傅雪海平顶山天安煤业股份有限公司六矿河南平顶山467099 中国矿业大学煤层气资源与成藏过程教育部重点实验室江苏徐州221116

为研究注入CO_(2)后煤岩吸附膨胀的各向异性特征,以沁水盆地无烟煤为研究对象,开展了煤岩CO_(2)吸附量及各向异性膨胀实验研究,并讨论了煤岩CO_(2)吸附量与应变量之间的关系。结果表明:煤岩注入CO_(2)后体积发生变形,体积应变随时间呈... 详细信息

为研究注入CO_(2)后煤岩吸附膨胀的各向异性特征,以沁水盆地无烟煤为研究对象,开展了煤岩CO_(2)吸附量及各向异性膨胀实验研究,并讨论了煤岩CO_(2)吸附量与应变量之间的关系。结果表明:煤岩注入CO_(2)后体积发生变形,体积应变随时间呈现阶段性变化;CO_(2)绝对吸附量和膨胀应变与CO_(2)注入压力之间均可用Langmuir模型来表征;煤岩吸附膨胀变形呈现明显的各向异性特征,煤岩垂直层理方向应变最大,其次是平行面割理方向,而平行端割理方向应变最小;煤岩绝对吸附量和煤岩膨胀应变符合S型曲线变化关系,可用Slogistic函数拟合;煤岩吸附CO_(2)基质膨胀首先以内部膨胀为主,割理或裂隙遭受压缩之后开始向外部膨胀,最终当煤岩内部应力状态达到平衡后,煤岩膨胀变形趋于稳定。

关键词： CO_(2)-ECBM 吸附量膨胀变形各向异性无烟煤煤层气开发

Stratum energy of coal-bed gas reservoir and their control on the coal-bed gas reservoir formation

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Science China Earth Sciences 2007年第9期50卷 1319-1326页

作者： WU CaiFang QIN Yong fu xuehai Department of Earth Resources and Geosciences China University of Mining & Technology Xuzhou 221008 China Department of Earth Resources and Geosciences China University of Mining & Technology Xuzhou 221008 China Department of Earth Resources and Geosciences China University of Mining & Technology Xuzhou 221008 China

Stratum energy of coal-bed gas reservoir, including coal-radix flexibility energy, groundwater flexibility energy and gas flexibility energy (hereinafter "three energy"), depends on the energy homeostasis system, the core process of which is the effective transfer of energy and the geological selective process. Combining with the mechanics experimentations of coal samples, different flexibility energy has been analyzed and researched quantificationally, and a profound discussion to their controls on the coal-bed gas reservoir formation has been made. It is shown that when gas reservoir is surrounded by edge water and bottom water, the deposited energy in the early phase of forming gas reservoir is mostly coal-radix and gas flexibility energy, but the effect of groundwater flexibility energy increases while water-body increases. The deposited energy in the middle and later phase of forming gas reser voir is mostly gas flexibility energy, which is greater than 80% of all deposited energy. In the whole process, larger groundwater body exerts greater influences on gas accumulation. The paper indicated that higher stratum energy is more propitious to forming coal-bed gas reservoir. And higher coal-radix flexibility energy and gas flexibility energy are more propitious to higher yield of gas reservoirs, while higher groundwater flexibility energy is more propitious to stable yield of gas reservoirs. Therefore, the key to evaluating the coal-bed gas reservoir formation is the stratum energy of coal-bed gas reservoir.

关键词： coal-bed reservoir, flexibility energy, coal-radix flexibility energy, groundwater flexibility energy, gas flexibility energy, coal-bed gas reservoir formation

广西上林合山组炭质泥岩中锂和稀土元素的成因及富集机制

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煤炭学报 2022年第5期47卷 1851-1864页

作者：曹泊秦云虎朱士飞傅雪海徐辉宗师江苏地质矿产设计研究院江苏徐州221006 中国矿业大学资源与地球科学学院江苏徐州221116

锂和稀土元素是我国重要的工业原料和战略性矿产资源,沉积型锂矿床成为国内外研究的热点,具有成为新型锂矿床的潜力。以广西上林县上二叠统合山组底部炭质泥岩为主要研究对象,通过反光显微镜、带能谱扫描电镜、X射线衍射、X射线荧光光... 详细信息

锂和稀土元素是我国重要的工业原料和战略性矿产资源,沉积型锂矿床成为国内外研究的热点,具有成为新型锂矿床的潜力。以广西上林县上二叠统合山组底部炭质泥岩为主要研究对象,通过反光显微镜、带能谱扫描电镜、X射线衍射、X射线荧光光谱、电感耦合等离子质谱等测试方法,分析了炭质泥岩的矿物学及元素地球化学特征,研究了炭质泥岩中锂和稀土的赋存状态和物质来源,讨论了炭质泥岩中锂和稀土元素富集的影响因素。结果表明,上林上二叠统合山组底部炭质泥岩中重稀土(重稀土氧化物质量分数为0.024%)接近了我国离子吸附型重稀土的边界品位,部分样品中锂(Li的质量分数大于1000μg/g)达到了国外黏土型锂矿边界品位,找矿潜力巨大;高锂的炭质泥岩中高岭石是锂的主要载体矿物,低锂的炭质泥岩中锂可能主要赋存在伊蒙混层中,稀土元素可能以离子吸附形式存在于黏土矿物(尤其是高岭石)中;炭质泥岩的沉积物主要来源于哀牢山—松马缝合带的二叠纪酸性岩浆岩,部分来自于峨眉山大火成岩省酸性岩浆岩,其中酸性岩浆岩中的云母是锂的主要来源,副矿物(独居石、磷灰石等)是稀土的主要来源;物源区强烈化学风化,是炭质泥岩中锂和稀土富集的主要因素,还原的浅水碳酸盐台地沉积环境是合山组底部炭质泥岩中锂和稀土元素的富集成矿的重要因素。

关键词：合山组锂稀土赋存状态富集机制

准噶尔盆地南缘急倾斜储层煤层气多层合采产出模拟研究

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煤炭科学技术 2022年第7期50卷 199-205页

作者：黄红星傅雪海赵增平陈东彭宏钊中联煤层气国家工程研究中心有限责任公司北京100095 中石油煤层气有限责任公司北京100028 中国矿业大学煤层气资源与成藏过程教育部重点试验室江苏徐州221116

为促进准噶尔盆地南缘具有巨厚、多层、急倾斜地质特征煤储层煤层气的高效开发,基于阜康西区CS18井地质数据,利用Eclipse软件模拟研究了不同层间距、不同排采强度和不同物性参数差异引起的层间干扰条件下急倾斜储层煤层气3层合排的产出... 详细信息

为促进准噶尔盆地南缘具有巨厚、多层、急倾斜地质特征煤储层煤层气的高效开发,基于阜康西区CS18井地质数据,利用Eclipse软件模拟研究了不同层间距、不同排采强度和不同物性参数差异引起的层间干扰条件下急倾斜储层煤层气3层合排的产出特征。模拟结果表明不同层间距的急倾斜储层煤层气3层合采总产出曲线形态基本一致,都呈现出日产气量先增大后降低的趋势。但是随着层间距的增大,第1层由于较高的渗透率使得产气量逐渐增大,而第3层则相反。但是第1层储层的增产量与第3层储层的减产量大部分抵消,储层上倾方向含气量随层间距的增大较下倾方向略快。所以整体上在3层合采过程中,第1层和第3层距离主采层(第1层)越近,其产气量越高,即层间距越大产气量越低。多层合采对于急倾斜储层来说上倾方向和下倾方向也存在差异。随着排采强度增大,上倾方向的储层压力快速降低,这加速了3层合采的进程。而排采强度较低,上倾方向储层因较高的储层压力使煤层气的解吸、产出受到抑制,但随着排采的进行,抑制逐渐消失。含气量和渗透率物性参数差异对多层合采的影响也存在不同,模拟显示中部储层含气量高有利于上部和下部储层煤层气的产出,而渗透率高则抑制上部和下部储层煤层气的产出。

关键词：急倾斜储层煤层气多层排采数值模拟层间干扰

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准南中低阶煤孔径结构全孔径定量综合表征

中国科技论文 2022年第1期17卷 62-71页

作者：卢杰林傅雪海康俊强中国矿业大学煤层气资源与成藏过程教育部重点实验室江苏徐州221116

为研究准南地区中低阶煤孔径结构特征,采集6块中低阶煤样,采用高压压汞、低温液氮吸附和二氧化碳吸附实验分别测试不同煤样的孔径结构,研究不同测试方法之间的衔接孔径,并对准南地区中低阶煤进行全孔径表征。结果表明,液氮吸附法与高压... 详细信息

为研究准南地区中低阶煤孔径结构特征,采集6块中低阶煤样,采用高压压汞、低温液氮吸附和二氧化碳吸附实验分别测试不同煤样的孔径结构,研究不同测试方法之间的衔接孔径,并对准南地区中低阶煤进行全孔径表征。结果表明,液氮吸附法与高压压汞法平滑过渡衔接应满足阶段体积增量相等,且阶段体积增量与孔径的一阶导数相等,即dV_(Hg)/dD=dV_(N2)/dD。准南地区中低阶煤孔径结构40 nm用高压压汞法表征。全孔径结构的联合表征结果表明,阶段孔体积的大孔>微孔>介孔,阶段比表面积的微孔>大孔>介孔。准南中低阶煤的惰质组含量与孔比表面积呈较好的正相关关系,对孔隙比表面积有重要贡献;镜质组含量与孔比表面积呈较强的负相关关系,对比表面积贡献较弱。研究结果对中低阶储层煤层气的赋存和运移具有理论意义,对中低阶储层煤层气的开发也有指导作用。

关键词：孔径结构全孔径表征高压压汞低温液氮吸附二氧化碳吸附