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Optimization of the natural gas hydrate hot water injection production method: Insights from numerical and phase equilibrium analysis

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APPLIED ENERGY 2024年 361卷

作者： Zhang, Zhaobin Li, Yuxuan Li, Shouding he, Jianming Li, Xiao Xu, Tao Lu, Cheng Qin, xuwen Chinese Acad Sci Key Lab Shale Gas & Geoengn Inst Geol & Geophys Beijing 100029 Peoples R China Chinese Acad Sci Innovat Acad Earth Sci Beijing 100029 Peoples R China Univ Chinese Acad Sci Coll Earth & Planetary Sci Beijing 100049 Peoples R China Minist Nat Resources China Geol Survey Oil & Gas Resources Survey Beijing 100083 Peoples R China Minist Nat Resources China Geol Survey Guangzhou Marine Geol Survey Guangzhou 510075 Peoples R China

The heat injection during depressurization is a crucial technique for sustaining the long-term gas production rate of natural gas hydrate. To analyze the production patterns and mechanisms of hydrate dissociation under various heat injection conditions and to further optimize heat injection strategies, this study establishes a reservoir-scale three-dimensional heterogeneous computational model using a self-developed hydrate simulator. A novel in-situ heating method utilizing bottom seawater is proposed for heat injection, and comprehensive analyses of heating power and injection rates are conducted. The results indicate that increasing heating power at a constant injection rate enhances gas production rates while reducing thermal efficiency. Simultaneously, under constant heating power, gas production rates initially increase and then decrease with increasing injection rates, revealing the presence of an optimal injection rate. This paper introduces the concepts of temperature driving force and temperature modification ratio, analyzes the mechanisms of heat injection development, and derives an optimized strategy for hot water injection through curve fitting. This research enhances our understanding of the integrated approach involving thermal stimulation and depressurization, providing significant guidance for future production endeavors.

关键词： Natural gas hydrate Thermal stimulation Three-dimensional modelling Temperature driving force Comprehensive analysis

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产学研创新主体适应性行为演进路径研究——基于扎根理论的案例研究

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中国科技论坛 2023年第9期 38-47,101页

作者：何声升迟景明张旭雯大连理工大学高等教育研究院辽宁大连116024

产学研创新生态系统中创新主体适应性行为是实现协同创新的重要方式。基于复杂适应系统理论分析产学研创新主体适应性行为内在逻辑,即产学研创新主体的适应性行为是主体自我选择、自我调节的主动建构过程。产学研创新主体相互适应,生成... 详细信息

产学研创新生态系统中创新主体适应性行为是实现协同创新的重要方式。基于复杂适应系统理论分析产学研创新主体适应性行为内在逻辑,即产学研创新主体的适应性行为是主体自我选择、自我调节的主动建构过程。产学研创新主体相互适应,生成复杂适应系统的复杂动态模式,推动着产学研创新生态系统的不断演化。本文围绕D大学和S集团的探索性案例,采用扎根理论凝练出产学研创新主体适应性行为需经历创造性搜寻、适应性选择、自觉性变异3个阶段的演进路径。因而产学研创新主体适应性行为过程,就是在创造性搜寻、适应性选择、自觉性变异的共同作用下螺旋式前进的过程。

关键词：产学研创新主体创新资源适应性行为创新生态系统

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Comprehensive feasibility analysis of carbon dioxide hydrate sequestration: A numerical study based on horizontal well networks

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ENVIRONMENTAL TECHNOLOGY & INNOVATION 2025年 37卷

作者： Li, Yuxuan Zhang, Zhaobin Li, Shouding he, Jianming Xie, Zhuoran Li, Xiao Lu, Cheng Qin, xuwen Chinese Acad Sci Inst Geol & Geophys State Key Lab Deep Petr Intelligent Explorat & Dev Beijing 100029 Peoples R China Univ Chinese Acad Sci Coll Earth & Planetary Sci Beijing 100049 Peoples R China Minist Nat Resources China Geol Survey Beijing 100037 Peoples R China

Carbon dioxide sequestration is a crucial strategy for achieving carbon neutrality. This study explores a novel approach to carbon dioxide storage in marine environments in the form of hydrate, addressing the stringent site requirements of traditional geological storage methods. Using a custom-developed simulator, a conceptual model for carbon dioxide sequestration in subsea reservoirs under a horizontal well network configuration was constructed. Key factors, including seawater depth, injection depth, and well spacing, were analyzed through simulations to quantify carbon dioxide storage capacity and assess associated risks under various sequestration scenarios. The results indicate that increasing seawater depth boosts both COQ storage capacity and safety, while deeper injection enhances safety but reduces hydrate storage capacity and raises leakage potential. Closer well spacing improves early-stage safety but increases long-term risks. The study outlines distinct sequestration stages and provides detailed analyses of COQ migration and phase transformations over time, contributing insights for advancing COQ sequestration strategies.

关键词： Carbon dioxide sequestration Hydrate Horizontal well network Seawater depth Injection depth Well spacing

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Quicklime-induced changes of soil properties: Implications for enhanced remediation of volatile chlorinated hydrocarbon contaminated soils via mechanical soil aeration

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CheMOSPheRE 2017年 173卷 435-443页

作者： Ma, Yan Dong, Binbin he, Xiaosong Shi, Yi Xu, Mingyue he, xuwen Du, Xiaoming Li, Fasheng China Univ Min & Technol Sch Chem & Environm Engn Beijing 100083 Peoples R China Chinese Res Inst Environm Sci State Key Lab Environm Criteria & Risk Assessment Dept Soil Pollut Control Beijing 100012 Peoples R China

Mechanical soil aeration is used for soil remediation at sites contaminated by volatile organic compounds. However, the effectiveness of the method is limited by low soil temperature, high soil moisture, and high soil viscosity. Combined with mechanical soil aeration, quicklime has a practical application value related to reinforcement remediation and to its action in the remediation of soil contaminated with volatile organic compounds. In this study, the target pollutant was trichloroethylene, which is a volatile chlorinated hydrocarbon pollutant commonly found in contaminated soils. A restoration experiment was carried out, using a set of mechanical soil-aeration simulation tests, by adding quicklime (mass ratios of 3,10, and 20%) to the contaminated soil. The results clearly indicate that quicklime changed the physical properties of the soil, which affected the environmental behaviour of trichloroethylene in the soil. The addition of CaO increased soil temperature and reduced soil moisture to improve the mass transfer of trichloroethylene. In addition, it improved the macroporous cumulative pore volume and average pore size, which increased soil permeability. As soil pH increased, the clay mineral content in the soils decreased, the cation exchange capacity and the redox potential decreased, and the removal of trichloroethylene from the soil was enhanced to a certain extent. After the addition of quicklime, the functional group COO of soil organic matter could interact with calcium ions, which increased soil polarity and promoted the removal of trichloroethylene.

关键词： Quicklime Mechanical soil aeration Soil Volatile chlorinated hydrocarbons Physical/chemical properties

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Optimizing fracturing techniques for enhanced hydrate dissociation in low-permeability reservoirs: Insights from numerical simulation

GAS SCIENCE AND ENGINEERING

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GAS SCIENCE AND ENGINEERING 2024年 125卷

作者： Zhang, Zhaobin Xu, Tao Li, Shouding he, Jianming Li, Xiao Li, Yuxuan Lu, Cheng Qin, xuwen Chinese Acad Sci Key Lab Shale Gas & Geoengn Inst Geol & Geophys Beijing 100029 Peoples R China Chinese Acad Sci Innovat Acad Earth Sci Beijing 100029 Peoples R China Univ Chinese Acad Sci Coll Earth & Planetary Sci Beijing 100049 Peoples R China Minist Nat Resources China Geol Survey Oil & Gas Resources Survey Beijing 100083 Peoples R China Minist Nat Resources China Geol Survey Guangzhou Marine Geol Survey Guangzhou 510075 Peoples R China

Natural gas hydrate represents an environmentally friendly alternative energy. However, the low-permeability hydrate reservoirs pose significant challenges to commercial production. To optimize hydrate production, reservoir stimulation methods like hydraulic fracturing, gas fracturing, and explosive fracturing are potential. In the investigation of the fracturing effect on hydrate dissociation behavior, we developed a three-dimensional model that comprehensively incorporates the arrangement of fracture planes, encompassing fracture permeability, spacing, and height. The model was implemented using a self-developed hydrate simulator which was validated at multiple scales. We firstly conducted a comparative analysis, contrasting the conventional depressurization method in horizontal wells with a combined depressurization and fracturing method. The comparison suggested that fracturing brings significant promotion (113.5%) on hydrate dissociation. Sensitivity analysis revealed fracture permeability and fracture height evidently exhibit an optimal value that facilitates the dissociation behavior. The optimal value of fracture permeability is dependent on the geological background. The optimal value of fracture height occurs just before penetrating the hydrate-bearing sediment layer and the overlying/underlying formations, i.e., near the thickness of the hydrate-bearing sediment layer. The impact of spacing on gas volume is limited while decreasing the spacing leads to more evident localized dissociation and differential subsidence of hydrate reservoir. It is necessary to balance production and geological risks when selecting the fracture spacing. The conclusions suggest that the fracturing operation need to be optimized by controlling the injection rate and the fracturing interval. It is not advisable to blindly pursue the effectiveness of reservoir stimulation but rather to consider the geological conditions. Additionally, we have found that it is preferable to establis

关键词： Numerical simulation Hydrate Fracturing Sensitivity analysis

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Enhanced strategies for depressurization in offshore natural gas hydrate exploitation: An in-depth investigation into pathway optimization and production stability mechanisms

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MARINE AND PETROLEUM GEOLOGY 2024年 170卷

作者： Li, Yuxuan Zhang, Zhaobin Li, Shouding he, Jianming Li, Xiao Xu, Tao Lu, Cheng Qin, xuwen Chinese Acad Sci Key Lab Shale Gas & Geoengn Inst Geol & Geophys Beijing 100029 Peoples R China Chinese Acad Sci Innovat Acad Earth Sci Beijing 100029 Peoples R China Univ Chinese Acad Sci Coll Earth & Planetary Sci Beijing 100049 Peoples R China China Geol Survey Minist Nat Resources Oil & Gas Resources Survey Beijing 100083 Peoples R China China Geol Survey Minist Nat Resources China Ctr Aerial Geophys & Remote Sensing Nat Reso Beijing 100083 Peoples R China

Natural gas hydrates have garnered widespread attention as a high-quality energy resource. Recent offshore extraction experiences suggest that depressurization is a technically mature and economically viable option. However, challenges such as reservoir temperature reduction, reservoir subsidence, secondary hydrate formation, and insufficient dynamics in later-stage hydrate decomposition still require improvements to the depressurization method. This study, based on field data from Japan's first offshore natural gas hydrate extraction, utilizes a self-developed numerical simulator to model and validate reservoirs at the field scale. Long-term production rate stability, total production, secondary hydrate formation, reservoir subsidence, evolution of permeability, and temperature-pressure paths were analyzed and optimized for the three mainstream depressurization modes: steady depressurization, stepwise depressurization, and cyclic depressurization. The results indicate that, under the condition of equal total work done throughout the entire depressurization process, steady depressurization with an effectively lower depressurization rate is the optimal choice. Cyclic depressurization, due to the formation of secondary hydrates reducing the permeability of certain reservoir zones, adversely affects gas production efficiency during the long-term stable production phase. This study enhances insights into the coupled evolution of multiple physical fields during the depressurization of offshore natural gas hydrates, providing valuable guidance for future on-site extraction plan designs.

关键词： Natural gas hydrates Depressurization modes Numerical simulation Multiple physical fields On-site extraction plan

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磁絮凝磁选机磁系设计与矿井水处理工艺优化

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水处理技术 2019年第7期45卷 85-88,92页

作者：张晓航何绪文高瑶房鑫卫明史弋中国矿业大学(北京)化学与环境工程学院北京100083 马鞍山市天工科技股份有限公司安徽马鞍山243000 河北政法职业学院河北石家庄056000

为提高磁絮凝工艺中磁性介质回收率,探究了全铁氧体和铁氧体+稀土2种磁材所组成磁系的磁感应强度和磁场梯度的变化规律,并优化了煤炭的开采矿井水的磁絮凝处理工艺。结果表明,全铁氧体磁材磁系更适用于水中磁絮体的回收,铁氧体+稀土磁... 详细信息

为提高磁絮凝工艺中磁性介质回收率,探究了全铁氧体和铁氧体+稀土2种磁材所组成磁系的磁感应强度和磁场梯度的变化规律,并优化了煤炭的开采矿井水的磁絮凝处理工艺。结果表明,全铁氧体磁材磁系更适用于水中磁絮体的回收,铁氧体+稀土磁材磁系更适用于磁种回收。最优混凝剂、絮凝剂分别为聚合氯化铝、阴离聚丙烯酰胺,适宜投加量分别为60、5.25 mg/L。熟化池出水磁场力、重力2种分离磁絮体方案中,重力分离方案出水浊度去除率最高,也最稳定。筛孔96μm磁种对浊度去除效果比180μm更佳;适宜磁种循环量为2 kg;混凝池、注射池、熟化池优化搅拌转速组合为300、100、100 r/min。

关键词：磁絮凝矿井水磁选机磁系磁种

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Exploring bifunctional molecules for anti-SARS-CoV-2 and anti-inflammatory activity through structure-based virtual screening, SAR investigation, and biological evaluation

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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES 2025年 287卷 138529页

作者： Lu, Jiani he, Yingying Li, Yaqi Chen, Xixiang Li, Hongtao Chen, xuwen Xu, Jianrong Chen, Hongzhuan Wang, Ying he, Xiao Liu, Shunying Chen, Lili Shanghai Univ Tradit Chinese Med Longhua Hosp Inst Interdisciplinary Integrat Med Res Shanghai Frontiers Sci Ctr TCM Chem Biol Shanghai 201203 Peoples R China East China Normal Univ Shanghai Engn Res Ctr Mol Therapeut & New Drug Dev Sch Chem & Mol Engn Shanghai 200062 Peoples R China Hunan Normal Univ Coll Life Sci Natl & Local Joint Engn Lab Anim Peptide Drug Dev Changsha 410081 Peoples R China Hunan Normal Univ Inst Interdisciplinary Studies Changsha 410081 Peoples R China Hunan Normal Univ Furong Lab Peptide& Small Mol Drug R&D Plateform Changsha 410081 Hunan Peoples R China DP Technol Beijing 100080 Peoples R China Shanghai Univ Tradit Chinese Med Inst Interdisciplinary Integrat Med Res Acad Integrat Med Shanghai Frontiers Sci Ctr TCM Chem Biol Shanghai 201203 Peoples R China Shanghai Univ Tradit Chinese Med Shanghai Inst Infect Dis & Biosecur Inst Interdisciplinary Integrat Med Res Res Ctr Tradit Chinese MedShanghai Frontiers Sci Shanghai 201203 Peoples R China East China Normal Univ Shanghai Engn Res Ctr Mol Therapeut & New Drug Dev Shanghai Frontiers Sci Ctr Mol Intelligent Synth Sch Chem & Mol Engn Shanghai 200062 Peoples R China NYU Shanghai NYU East China Normal Univ Ctr Computat Chem Shanghai 200062 Peoples R China

As new variants of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) continue to emerge, they raise increasing concerns about the efficacy of neutralizing antibodies and vaccines. This situation underscores the urgent need for specific drugs against the coronavirus disease 2019 (COVID-19). Given that COVID-19 is particularly associated with substantial inflammation, the development of novel, effective antiviral and antiinflammatory agents represents a promising research direction. In this study, we virtually screened a library consisting of 2900 anti-inflammatory small molecules for their inhibitory effects on the 3-chymotrypsin-like protease (3CLpro) of SARS-CoV-2 and selected 23 promising candidates for further testing using a fluorescence resonance energy transfer (FRET) assay. The results indicated that Gnetol had the most potent inhibitory effect against SARS-CoV-2 3CLpro. Further structural modifications led to the identification of compounds 38 and 39, which displayed superior inhibitory activity. Compound 39 showed good selectivity for host proteases. Subsequently, Gnetol and its structural analogs, which demonstrated SARS-CoV-2 3CLpro inhibitory activity, were tested for their anti-inflammatory effects. Among these, Piceatannol and compound 39 exhibited enhanced antiinflammatory effects, with compound 39 alone showing the most potent antiviral and anti-inflammatory activity. Thus, our study has explored a new research strategy for discovering antiviral and anti-inflammatory bifunctional molecules. The discovery of Gnetol and its structural analogs has provided new lead candidates for the development of COVID-19 therapeutics.

关键词： COVID-19 Virtual screening Anti-inflammation Bifunctional molecule

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银川市社区老年人医养结合服务需求及影响因素研究

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中外女性健康研究 2020年第4期 7-8+17页

作者：仇艳敏刘国莲何旭文牛萌刘赟赟郑连花宁夏医科大学护理学院

目的:了解银川市社区老年人医养结合服务需求及影响因素,为银川市更好地开展医养结合服务提供一定的参考依据。方法:采用便利抽样法,于2019年1至2019年3月选择银川市3个社区卫生站120例符合纳入排除标准的社区老年人为研究对象,采用《... 详细信息

目的:了解银川市社区老年人医养结合服务需求及影响因素,为银川市更好地开展医养结合服务提供一定的参考依据。方法:采用便利抽样法,于2019年1至2019年3月选择银川市3个社区卫生站120例符合纳入排除标准的社区老年人为研究对象,采用《社区老年人医养结合服务需求调查问卷》进行问卷调查。结果:社区老年人医养结合服务需求率为92.7%。多元线性回归结果显示影响社区老年人医养结合服务需求的因素包括婚姻状态、居住状况、家庭月收入、患慢性病情况、半年就诊次数和医养结合知晓度等。结论:银川市社区老年人医养结合需求较高,其中社会福利类需求最高。建议社区卫生机构以社区老年人医养结合服务需求为导向,更好地开展社区老年人医养结合工作。

关键词：社区老年人医养结合影响因素

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基于《水处理工程》的酸性高铁矿井水综合实验设计

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中国矿业 2019年第6期28卷 133-138页

作者：章丽萍马项阳吴胜念薛静雯郑洋何绪文中国矿业大学(北京)化学与环境工程学院

菱镁矿尾矿煅烧后产生的轻烧镁粉对于酸性矿井水的处理具有效果好、操作条件良好、沉渣少等优点。通过对轻烧镁粉的成分分析可知,主要成分氧化镁占比高于90%。以山西某煤矿酸性矿井水为研究对象,对其进行常规水质分析可知,总铁浓度为230... 详细信息

菱镁矿尾矿煅烧后产生的轻烧镁粉对于酸性矿井水的处理具有效果好、操作条件良好、沉渣少等优点。通过对轻烧镁粉的成分分析可知,主要成分氧化镁占比高于90%。以山西某煤矿酸性矿井水为研究对象,对其进行常规水质分析可知,总铁浓度为230.01mg/L、亚铁离子浓度为66.98mg/L、pH值为3.24。采用轻烧镁粉进行酸性矿井水处理,设计正交实验,分析初始pH值、药剂投加量、曝气量、曝气时间等对处理效果的影响。实验结果表明,在投加轻烧镁粉量为0.50~1.00g/L时,酸性矿井水初始pH值可由3.15~3.31提高到6~9左右,缓冲性能较好,较容易控制投加量使pH值控制在6~9;轻烧镁粉处理酸性矿井水时三个主要因素的影响程度大小为:投加量>搅拌时间>搅拌速度,当轻烧镁粉投加量为0.85g/L、搅拌速度为400r/min、搅拌时间为12min时,实验效果较好;利用轻烧镁粉提高酸性矿井水的pH值到7.48时,曝气5min,曝气量为0.5m3/h,聚合氯化铝(PAC)投加量为10mg/L时,经处理矿井水中亚铁离子和总铁浓度可分别降至0.07mg/L和0.17mg/L,满足排放或回用水对总铁的要求,且改善了沉渣的沉降性能,大大缩短了沉降时间。

关键词：轻烧镁粉酸性矿井水总铁 PAC 沉降性能创新实验

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