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The origin mechanism of coalbed methane in the eastern edge of Ordos Basin

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Science China Earth Sciences 2013年第8期56卷 1701-1706页

作者： li guihong ZHANG Hong Xi'an Research Institute of China Coal Technology & Engineering Group Corp.

In the eastern edge of the Ordos Basin,the coalbed methane(CBM)development has not made substantial progress in the past20 years,and the origin of gas can be used to guide the CBM block-selecting and *** on the 37 sets of carbon isotope data,the origin of the gas was determined and the origin mechanism was studied in this *** 13CPDB of methane ranges from 70.5‰to 36.19‰in the eastern edge in the Ordos Basin and the value becomes heavier from the north to the *** secondary biogenic gas and the thermogenic gas are mixed in the shallow area and the thermogenic gas occurs in the medium and deep *** phenomenon is controlled mainly by the distribution of coal rank and ***,based on the relationship between China coal rank and methane 13CPDB,the medium rank coal is dominant in the eastern edge of the Ordos Basin,and the mixture of the secondary biogenic gas and the thermogenic gas is formed in the coal of vitrinite reflectant ratio(Rmax)between 0.5%and 2.0%if there is appropriate hydrodynamics;at the same time,because of the shallow burial depth,and the well-developed coal outcrop,meteoric water and other surface water carrying bacteria recharge the coal reservoir,metabolize the organic compounds at a relatively low temperature,and generate methane and carbon *** the trapping mechanisms occur in the coal,such as liulin and Hancheng,modern gas content should be high.

关键词： the eastern edge of the Ordos Basin coalbed methane origin mechanism

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Bone marrow mesenchymal stem cell therapy in ischemic stroke: mechanisms of action and treatment optimization strategies

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Neural Regeneration Research 2016年第6期11卷 1015-1024页

作者： guihong li Fengbo Yu Ting Lei Haijun Gao Peiwen li Yuxue Sun Haiyan Huang Qingchun Mu Department of Neurosurgery the First Hospital of Jilin University Department of Neurosurgery Hongqi Hospital of Mudanjiang Medical University School of Pharmacy Mudanjiang Medical University

Animal and clinical studies have confirmed the therapeutic effect of bone marrow mesenchymal stem cells on cerebral ischemia, but their mechanisms of action remain poorly understood. Here, we summarize the transplantation approaches, directional migration, differentiation, replacement, neural circuit reconstruction,angiogenesis, neurotrophic factor secretion, apoptosis, immunomodulation, multiple mechanisms of action,and optimization strategies for bone marrow mesenchymal stem cells in the treatment of ischemic *** also explore the safety of bone marrow mesenchymal stem cell transplantation and conclude that bone marrow mesenchymal stem cell transplantation is an important direction for future treatment of cerebral ischemia. Determining the optimal timing and dose for the transplantation are important directions for future research.

关键词： neurotrophic understood infarct poorly neurological secretion angiogenesis migration directional intravenous

Evolution of the CBM reservoir-forming dynamic system with mixed secondary biogenic and thermogenic gases in the Huainan Coalfield,China

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Chinese Science Bulletin 2005年第S1期50卷 30-39页

作者： ZHANG Hong CUI Yongjun TAO Mingxin PENG Gelin JIN Xianglan li guihong Institute of Geology Xi’an BranchChina Coal Research InstituteXi’an 710054China Key Laboratory of Gas Geochemistry Institute of Geology and GeophysicsChinese Academy of SciencesLanzhou 73000China Changsha Institute of Geotectonics Chinese Academy of SciencesChangsha 410013China

The secondary biogenic gas is an important original type of the coalbed methane (CBM) in China. Based on the analyses of sedimentary and burial history of the Permian coal-bearing strata, combined with thermal history and gas generation process of coals, the CBM reservoir-forming dynamic system with mixed secondary biogenic and thermogenic gases in the Huainan Coalfield is subdivided into four evolutionary stages as follows: (i) shallowly-buried peat and early biogenic gas stage; (ii) deeply buried coal seams and thermogenic gas stage; (iii) exhumation of coal-bearing strata and adsorbed gas lost stage; and (iv) re-buried coal-bearing strata and secondary biogenic gas supplement stage. The Huainan CBM reservoir-forming model has the features of the basin-centered gas accumulation. The evolution of the reservoir-forming dynamic system proves that the thermogenic gas is not the main gas source for the Huainan CBM reservoir. Only the secondary biogenic gases as an additional source replenish into the coal bed after basin-uplift, erosional unroofing and subsequent scattering of thermogenic gases. Then this kind of mixed CBM reservoirs can be formed under suitable conditions.

关键词： coalbed methane (CBM) secondary biogenic gas ther-mogenic gas evolution reservoir-forming dynamic system the Huainan Coalfield.

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鄂尔多斯盆地黄陵地区侏罗系煤层气来源判识

煤炭学报 2018年第4期43卷 1052-1057页

作者：李贵红中煤科工集团西安研究院有限公司陕西西安710054

鄂尔多斯盆地黄陵地区在煤田勘探、建井和采煤中,发现了小规模的油气显示,推测该区域煤层中存在油型气,这一点与煤层气作为自生自储型资源的常规认识不同。为进一步验证这一推测,从煤层顶板、煤层、底板及采空区采集220组气体样品,开展... 详细信息

鄂尔多斯盆地黄陵地区在煤田勘探、建井和采煤中,发现了小规模的油气显示,推测该区域煤层中存在油型气,这一点与煤层气作为自生自储型资源的常规认识不同。为进一步验证这一推测,从煤层顶板、煤层、底板及采空区采集220组气体样品,开展气体组分、甲烷碳同位素δ13C1、甲烷氢同位素δD、乙烷碳同位素δ13C2的测试。测试结果表明,煤层中气体来源为煤成气和油型气组成的混合气,进一步利用Schoell图版分析,煤层及其围岩中油型混合气主要为裂解凝析气、生物气和石油伴生气。这些气体来源于下部三叠系延长组泥页岩,通过地层中的断层与裂缝,向上运移至侏罗纪煤系中储存下来,提高了煤层含气性。

关键词：煤层气气体来源油型气煤成气混合气

Characteristics of fissures and pores of anthracite in Jincheng by SEM

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Mining Science and Technology 2010年第5期20卷 789-793页

作者： li guihong,ZHANG Hong,ZHANG Hui,SONG Xiaozhong Institute of Geology,Xi’an Branch,China Coal Research Institute,Xi’an 710054,China Institute of Geology Xi'an Branch China Coal Research Institute Xi'an 710054 China

Anthracite in Jincheng is a highly metamorphic coal and its system of fissures and pores is differentfrom that of low and medium ranked *** order to discover their characteristics,69 samples were collected from 18 CBM wells in Zhengzhuang in Jincheng and their fissures and pores were observed by a Scanning Electron Microscope(SEM).To the naked eyes and by SEM,the pores in the Jincheng anthracite are seen to have abundant mold pores with isolated,shallow and poor connectivity(diameters between 1～50 μm) and few plant tissue pores,gas pores,and solution *** of the fissures are filled with clay minerals or closed;while open fissures are not often visible in the Jincheng coal(aperture between 3～10 μm).These characteristics are determined by the high rank and high vitrinite content of the *** existence of too many mold pores and filled fissures does not allow the migration of methane,hence hydraulic fracture stimulation will be required and is an effective method of adding and connecting fissures to enhance CBM production.

关键词： anthracite coalbed methane fissure pore

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筠连煤田晚二叠世煤系页岩储层初步评价

煤炭科学技术 2015年第10期43卷 127-132页

作者：李贵红中国煤炭科工集团西安研究院有限公司陕西西安710054

针对勘探证实筠连煤田晚二叠世龙潭组煤系泥页岩有一定的含气性,对页岩储层开展含气资源潜力评价。运用多种手段,对筠连煤田晚二叠世龙潭组煤层顶底板泥页岩样的生烃条件、储层物性及含气性等方面进行相关测试。结果显示:筠连泥页岩干... 详细信息

针对勘探证实筠连煤田晚二叠世龙潭组煤系泥页岩有一定的含气性,对页岩储层开展含气资源潜力评价。运用多种手段,对筠连煤田晚二叠世龙潭组煤层顶底板泥页岩样的生烃条件、储层物性及含气性等方面进行相关测试。结果显示:筠连泥页岩干酪根类型为Ⅲ型,处于过成熟热演化阶段,镜质组反射率平均3.11%,总有机碳平均2.66%,黏土矿物含量平均54%,石英含量平均39.5%,解吸含气量平均1.9 m3/t。分析表明,筠连煤田龙潭组泥页岩储层各项指标基本达到了页岩气开发的最低要求,但与美国Barnett页岩相比,除埋深浅外,其各项指标均相对较差,尤其石英等脆性矿物含量较低,不利于页岩储层的压裂造缝。

关键词：煤系页岩气储层特征含气性筠连煤田

KINETICS OF YTTERBIUM ION EXTRACTION BY CA-12 AT THE liQUID-liQUID INTERFACE

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化工学报 2000年第S1期51卷 311-314页

作者： Yue Shantang, Luo Fang, Yu guihong, li Deqian and Su Qiang (Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applid Chemistry Chinese Academy of Science, Changchun 130022)

The mass-transfer kinetics of ytterbium between aqueous solutions and heptane solutions of CA- 12 and CA-12-HEHEHP have been studied by using a constant interfacial area cell with laminar flow. The results have been interpreted according to a series of reversible interfacial reactions. In this work, it has been discovered that HEHEHP can increase the rate of ytterbium extraction by CA-12.

关键词： extraction kinetics ytterbium CA-12 HEHEHP

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鄂尔多斯盆地东缘煤层气有利区块优选

煤田地质与勘探 2015年第2期43卷 28-32页

作者：李贵红中煤科工集团西安研究院有限公司陕西西安710077

鄂尔多斯盆地东缘经过20 a的勘探开发,煤层气仍然没有实现产业化。随着勘探资料的不断丰富,有必要对该区进行煤层气有利区块的优选和重新认识。在前人研究基础上,首先将鄂尔多斯盆地东缘埋深1 500 m区域分为6个区块,选取煤层厚度、含气... 详细信息

鄂尔多斯盆地东缘经过20 a的勘探开发,煤层气仍然没有实现产业化。随着勘探资料的不断丰富,有必要对该区进行煤层气有利区块的优选和重新认识。在前人研究基础上,首先将鄂尔多斯盆地东缘埋深1 500 m区域分为6个区块,选取煤层厚度、含气量、构造条件、水文条件、煤体结构、含气饱和度、储层压力梯度、渗透率和临界解吸压力与储层压力比9个参数作为区块优选指标,结合国内外及研究区实际情况制定了相应的评价临界值。将上述参数作为评价指标集合,以评价单元作为对象集,以有利、较有利和不利作为评级等级集合,然后运用模糊数学综合评判方法得到各评价单元的不同评价参数对评价等级的隶属度,并运用层次分析法确定了各指标的相对权重,最后得到了评价单元对评价等级的隶属度。根据最大隶属度原则,吴堡–柳林属于有利区,大宁–吉县和韩城属于较有利区,准格尔、府谷、河曲–临县属于不利区,吴堡–柳林的煤层气可采性好于大宁–吉县和韩城。因此,建议将吴堡–柳林、大宁–吉县和韩城定为研究区煤层气优先开发区块。

关键词：煤层气鄂尔多斯盆地东缘有利区块优选模糊数学综合评判层次分析法

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3种方法去除根管玷污层能力的比较研究

实用口腔医学杂志 2018年第4期34卷 530-535页

作者：王天李桂红南开大学口腔医院牙体牙髓病一科天津市口腔医院 300041

目的:比较超声、声波和Er∶YAG激光去除根管玷污层能力。方法:将离体单根管的下前磨牙40个,分别用声波器械(YB组)、超声波器械(CS组)、Er∶YAG激光(Er组)以及生理盐水(DZ组,对照组)行根管预备后的辅助预备(n=10)。记录根尖孔碎屑溢出量... 详细信息

目的:比较超声、声波和Er∶YAG激光去除根管玷污层能力。方法:将离体单根管的下前磨牙40个,分别用声波器械(YB组)、超声波器械(CS组)、Er∶YAG激光(Er组)以及生理盐水(DZ组,对照组)行根管预备后的辅助预备(n=10)。记录根尖孔碎屑溢出量。应用扫描电镜进行观察根管内侧壁,根据根管表面玷污层情况和牙本质小管腐蚀程度比较3种方法去除根管玷污层的能力。结果:4组根尖孔碎屑溢出量无显著性差异(P>0.05)。在去除玷污层方面,CS、YB和Er组优于对照组(P0.05;在根尖1/3,CS、Er组效果好于YB组,但差于本组根上、中1/3(P<0.05)。在根管壁腐蚀程度方面,CS组在根上、中1/3出现腐蚀,多于其他组(P<0.05)。结论:Er∶YAG激光去除玷污层效果较音波好,与超声近似,尤其根尖1/3区,对根管壁表面结构无明显破坏,适宜临床常规应用。

关键词：超声音波 Er∶YAG激光玷污层