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Study of the Reservoir Damage during Cyclic Injection and Extraction Process in the Hutubi Gas Storage

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Earthquake Research in China 2018年第2期32卷 288-300页

作者： Wang Jianbo Ge Hongkui Wang Xiaoqiong liu tongyuan liu Dunqing Zhang Yanjun Wu Shan Unconventional Natural Gas Research Institute China University of PetroleumBeijing 102249China China University of Petroleum(Beijing)at Karamay Karamay 834000XinjiangChina

During the injection and extraction process in gas storage,cyclic loading stress is applied to the reservoir pore structure,affecting the capacity and service life of gas storage. To study the influence of cyclic injection and extraction on reservoir physical property,a finite-element model of reservoir elastoplastic damage under the effect of pore pressure is established based on elastoplastic mechanics and fatigue-damage mechanics. Considering the mechanical property of the Hutubi reservoir and the injection-extraction mode of gas storage,the finite-element model is used to study the pore pressure and porosity change,fault safety,and ground surface deformation. The results show that the change in pore pressure and porosity,the deformation of the Hutubi fault,as well as the uplift and sink of the grounds surface are controlled by the fatigue damage of the reservoir pore structure during the injection-extraction process. After a 6-year service life, the cumulative deformation of the reservoir pore reaches its limit,causing pore structure collapse and porosity decrease. As a result,storage capacity declines and the ground surface starts to sink. Through this study,the safety of the Hutubi gas storage is evaluated,and some suggestions for field operations are offered.

关键词： Gas storage Injected/extracted Fatigue damage Porosity

Multi-Plate Microbial Monitoring Terminal Based on Raspberry Pi 4B

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Journal of Electronic Research and Application 2024年第3期8卷 28-33页

作者： Qirong Luo Xichang Cai tongyuan liu School of Information North China University of TechnologyBeijing 100144China

We utilized Raspberry Pi 4B to develop a microbial monitoring system to simplify the microbial image-capturing process and facilitate the informatization of microbial observation *** Raspberry Pi 4B firmware,developed under Python on the Linux platform,achieves sum verification of serial data,file upload based on TCP protocol,control of sequence light source and light valve,real-time self-test based on multithreading,and an experiment-oriented file management *** system demonstrated improved code logic,scheduling,exception handling,and code readability.

关键词： Raspberry Pi 4B Object-oriented Multithreading Serial port protocol and parsing TCP

Influence of Bedding and Mineral Composition on Mechanical Properties and Its Implication for Hydraulic Fracturing of Shale Oil Reservoirs

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Earthquake Research in China 2020年第2期34卷 167-186页

作者： WANG Xiaoqiong XU Jianguo ZHAO Chenxu liu tongyuan GE Hongkui SHEN Yinghao WU Shan YU Jiayao HUANG Rongyan State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China The Unconventional Oil and Gas Institute China University of Petroleum(Beijing)Beijing 102249China Research Institute of Oil and Gas Engineering PetroChina Jilin Oil and Gas Field CompanySongyuan 138001China

The premise of hydraulic fracturing is to have an accurate and detailed understanding of the rock mechanical properties and fracture propagation law of shale reservoirs. In this paper,a comprehensive evaluation of the mechanical properties of the shale oil reservoir in the south of Songliao Basin is carried out. Based on the experiments and the in-situ stress analysis, the fracture propagation law of three types of shale reservoirs is obtained,and the suggestions for fracturing are put forward. The results have shown that the fracture propagation of pure shale and low mature reservoir is easy to open along the bedding plane under compression loading,which is greatly influenced by the bedding. Sand-bearing shale is slightly better,the fractures of which are not easy to open along the bedding plane. The mechanical experimental results show that all the samples have the characteristics of low compressive strength,low Young’s modulus and strong anisotropy,indicating that the shale oil reservoir is certain plastic,which is related to its high clay mineral content and controlled by the bedding development. Compared with pure shale and low mature shale,the sandbearing shale has less clay content and less developed bedding,which maybe the main reason for its slightly better brittleness. Overall,the expansion of hydraulic fracture is controlled by in-situ stress and bedding. Because of the development of bedding,it is easy to form horizontal fractures. Thus it is not suitable for horizontal well *** of the high content of clay minerals,the applicability of conventional slick hydraulic fracturing fluid is poor. It is suggested to use vertical well or directional well to carry out volume fracturing. In this way,the effect of bedding can be effectively used to open and connect the bedding and form a larger fracture network.

关键词： Shale reservoir Mechanical properties Fracture Hydraulic fracturing Horizontal well Bedding

Application Value of Musculoskeletal Ultrasound in DAA-THA with Conjoined Tendon Repair

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Journal of Clinical and Nursing Research 2021年第6期5卷 61-66页

作者： Guanbao Li Pinquan Li Wei Zhou Qiuan Chen Peng Ma tongyuan liu Hai Tang The First Department of Hip Joint Yulin Orthopedic Hospital of Chinese and Western MedicineYulin 537000China

Objective:To observe the ultrasonographic characteristics of conjoined tendon repair in direct anterior approach for total hip arthroplasty(DAA-THA),and to evaluate the efficacy of musculoskeletal ultrasound in determining the healing after joint tendon ***:A total of 60 patients who required primary total hip arthroplasty in Yulin Orthopedic Hospital of Chinese and Western Medicine from July 2020 to July 2021 were selected;the patients were divided into two groups,an observation group,group A(n=30),and a control group,group B(n=30),according to different intraoperative *** was no significant difference in gender,age,and diagnosis between the two *** anterior approach was used for both the *** group A,the joint capsule and conjoined tendon(superior gemellus,obturator internus,and inferior gemellus)were repaired in situ,whereas for group B,only the joint capsule was repaired in situ,while the conjoined tendon was not *** healing of the tendon was ***:(1)in terms of diagnosis,after conjoined tendon repair,26 cases in group A showed good tendon continuity,good tension,and a small amount of effusion echo around,three cases showed partial interruption of tendon echo,low echo,or no echo inside with insufficient structural clarity,and a case showed complete interruption;in group B,all 30 cases had continuous interruption,poor tension,tendon retraction,and thickening;the healing rate of group A’s conjoined tendon repair was 96.67%;(2)in terms of prognostic assessment,one month after the surgery,the Harris score of group A was significantly higher than that of group B(P0.05);the effective tension of conjoined tendon and the effective muscle strength of group A were significantly higher than those of group B(P<0.05).Conclusion:Musculoskeletal ultrasound has high diagnostic value in the

关键词： Musculoskeletal ultrasound Direct anterior approach Total hip arthroplasty Conjoined tendon Repair

锻炼自我设限对大学生的完美主义与锻炼行为的中介作用

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华中师范大学学报（自然科学版） 2014年第1期48卷 142-147页

作者：邱芬卢洋刘同员武汉理工大学体育部武汉430070 武汉职业技术学院体育部武汉430074

采用多维完美主义量表和锻炼自我设限量表对582名大学生进行测量,探讨锻炼自我设限对完美主义与锻炼行为是否具有中介作用.根据Baron和Kenny对中介因素分析方法的建议,运用线性回归方法对时间管理锻炼自我设限的中介作用进行检验.结果表... 详细信息

采用多维完美主义量表和锻炼自我设限量表对582名大学生进行测量,探讨锻炼自我设限对完美主义与锻炼行为是否具有中介作用.根据Baron和Kenny对中介因素分析方法的建议,运用线性回归方法对时间管理锻炼自我设限的中介作用进行检验.结果表明,大学生完美主义中的个人标准、行动迟疑和担心错误对锻炼行为的影响显著,但该影响由于锻炼自我设限(寻求辩解、减少努力)的加入而变小或变得不显著.说明锻炼自我设限对完美主义与锻炼行为具有中介作用.

关键词：完美主义锻炼自我设限锻炼行为大学生中介作用

我国竞技体育后备人才培养模式的演变及思考--兼论“体教结合”与“教体结合”模式

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天津体育学院学报 2009年第3期24卷 221-223页

作者：阳艺武刘同员黄彩虹武汉理工大学体育部武汉430070 湖北工业大学体育部武汉430068

我国竞技体育后备人才培养模式在经历了全运会选拔模式、政府主导型培养模式、举国体制下的三级训练网模式、"体教结合"和"教体结合"模式之后,还处于实变阶段,并没有达到质变的高度;通过对"体教结合"与"教体结合"模式的理解和二者存在... 详细信息

我国竞技体育后备人才培养模式在经历了全运会选拔模式、政府主导型培养模式、举国体制下的三级训练网模式、"体教结合"和"教体结合"模式之后,还处于实变阶段,并没有达到质变的高度;通过对"体教结合"与"教体结合"模式的理解和二者存在根本分歧的认识,在思考原有后备人才培养模式存在的弊端以及从"体教结合"与"教体结合"模式得到的启示,提出后奥运时代我国竞技体育后备人才的培养必将向完全依托教育系统的全新机制转变。

关键词：竞技体育后备人才培养模式体教结合教体结合

后奥运时期村落农民对北京奥运会认知与态度研究

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天津体育学院学报 2009年第5期24卷 392-394页

作者：郭敏刚刘同员胡庆山华中师范大学体育学院武汉430079 武汉理工大学公共体育部武汉430070

运用问卷调查、比较分析、数理统计等研究方法,就不同地区村落农民对北京奥运会的认知情况进行地域上的横向对比分析,并就部分人口学变量下的村落农民对北京奥运会的态度进行了比较分析。研究认为,村落农民对北京奥运会的认知程度尚处... 详细信息

运用问卷调查、比较分析、数理统计等研究方法,就不同地区村落农民对北京奥运会的认知情况进行地域上的横向对比分析,并就部分人口学变量下的村落农民对北京奥运会的态度进行了比较分析。研究认为,村落农民对北京奥运会的认知程度尚处于较低水平;从村落农民对北京奥运会的态度来看,男性较女性更积极,在年龄结构上,青少年态度最积极,老年次之,中年最消极,在文化程度与家庭人均年收入上,文化程度越高态度越积极,家庭人均年收入越高态度也越积极。

关键词：北京奥运会村落农民认知态度

测量位点对CT瞬时无波比值诊断冠状动脉缺血特异性狭窄性能的影响

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中华医学杂志 2021年第39期101卷 3208-3213页

作者：刘通源唐春香周帆李俊灏许棚棚刘春雨张龙江南方医科大学第一临床医学院东部战区总医院放射诊断科南京210002 东部战区总医院放射诊断科南京210002

目的探究测量位点对CT瞬时无波比值(iFRCT)诊断冠状动脉缺血特异性狭窄准确度的影响。方法回顾性收集2009年2月至2018年5月在东部战区总医院放射诊断科行冠状动脉CT血管成像(CCTA)检查并接受有创性血流储备分数(FFR)检查的44例患者的资... 详细信息

目的探究测量位点对CT瞬时无波比值(iFRCT)诊断冠状动脉缺血特异性狭窄准确度的影响。方法回顾性收集2009年2月至2018年5月在东部战区总医院放射诊断科行冠状动脉CT血管成像(CCTA)检查并接受有创性血流储备分数(FFR)检查的44例患者的资料,其中男27例,女17例,年龄40~83(59.3±9.3)岁。基于CCTA图像通过流体力学模拟计算不同位点(狭窄处、狭窄处下游近端、狭窄处下游2 cm、狭窄处下游3 cm、狭窄处下游4 cm)的iFRCT值。以有创性FFR≤0.80作为诊断冠状动脉缺血特异性狭窄的金标准,采用受试者工作特征(ROC)曲线分析不同测量位点iFRCT的诊断性能。采用Bland-Altman图和Spearman相关系数分析iFRCT与FFR间的相关性,采用组内相关系数(ICC)检验iFRCT观察者内和观察者间的一致性。结果狭窄处下游近端(最狭窄处下游约1 cm)iFRCT值诊断冠状动脉缺血特异性狭窄的性能优于其他测量位点,其阈值、曲线下面积、敏感度、特异度、准确度分别为0.91、0.87(95%CI:0.76~0.96)、82%(95%CI:48%~97%)、76%(95%CI:57%~88%)、77%(95%CI:63%~87%)。Bland-Altman分析结果显示狭窄处下游近端iFRCT与FFR之间的差异均值为0.07[95%一致限(LOA):0.06~0.09],r= 0.53(P<0.001)。狭窄处下游近端观察者内ICC为0.92(95%CI:0.85~0.95),r=0.85(P<0.001);观察者间ICC为0.85(95%CI:0.60~0.94),r=0.75(P<0.001)。结论以有创性FFR值为金标准,iFRCT对冠状动脉缺血特异性狭窄具有较好的诊断性能,最佳测量位点为狭窄处下游近端。

关键词：冠状动脉疾病 CT血管成像血流动力学血流储备分数瞬时无波比值

Spectra of p-^(11)B Three-Body Sequential Decay Reaction

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Chinese journal of nuclear physics 1997年第4期 220-225页

作者： Yuan Jian liu Xiaodong Xu Guoji Sun Zuxun China Institute of Atomic Energy,Beijing 102413Lin Erhkang Wang Changwan Yu Yuehchung liu tongyuan Institute of Physics,Academia Sinica,Taipei 11529Tang Guoyou Shi Zhaomin Chen Jinxiang Gong Linghua Yang Qixiang Institute of Heavy Ion Physics,Peking University,Beijing 100871Zhang Peihua Graduate School,the Chinese Academy of Sciences,P.O.Box 3908,Beiting 100039

The angular distributions,excitation functions and absolute cross sections of a parti-cles from p-11B reaction for proton energies from 778 keV to 3389 keV are *** PIPS（Passivated Implanted Planar Silicon）and ΔE detector spectrometer is used to distinguish theprotons and α particles based on the fact that proton peak has larger displacement when protonspass through the ΔE *** spectra of 11B（p,2α）4He subsequential decay via the firstexcited state of 8Be are first *** behavior of the cross section is discussed.

关键词： Clean fusion fuel Enriched target Nuclear reaction