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Energy Geoscience 2022年第3期3卷 270-281页

作者： Yanqing Huang Ai Wang kaihua xiao Tian Lin Wujun Jin Petroleum Exploration and Production Research Institute SINOPECBeijing 100083China

Through comprehensively applying geological and geophysical data,as well as core and thin section observation,the characteristics of reservoirs and fractures in the second member of the Xujiahe Formation(hereinafter referred to as Xu2 Member)in the Yuanba area,northern Sichuan Basin,were studied.Combined with the analysis of the main controlling factors of production capacity,the types and characteristics of the sweet spots in the tight sandstone gas reservoir were determined.The evaluation standards and geological models of the sweet spots were established.The results are as follows:(1)There are bedding-parallel fracture-,fault-induced fracture-,and pore-dominated sweet spots in the tight sandstone gas reservoirs of the Xu2 Member.(2)The bedding parallel fracture-dominated sweet spots have developed in quartz sandstones with well-developed horizontal fractures and micro-fractures.They are characterized by high permeability and high gas output during production tests.This kind of sweet spots is thin and shows a limited distribution.Their logging responses show extremely low gamma-ray(GR)values and medium-high AC values.Moreover,the bedding parallel fracture-dominated sweet spots can be mapped using seismic methods.(3)The fault-induced fracture-dominated sweet spots have welldeveloped medium-and high-angle shear fractures.Their logging responses show an increase in peaks of AC values and total hydrocarbon content and a decrease in resistivity.Seismically,the areas with welldeveloped fault-induced fracture-dominated sweet spots can be effectively mapped using the properties such as seismic entropy and maximum likelihood.(4)The pore-dominated sweet spots are developed in medium-grained feldspathic litharenites with good reservoir properties.They are thick and widely distributed.(5)These three types of sweet spots are mainly determined by sedimentation,diagenesis,and tectonism.The bedding parallel fracture-dominated sweet spots are distributed in beachbar quartz sandstones on the top of the 1st sand layer group in th

关键词： Sweet spot Evaluation standard Tight sandstone gas reservoirs Xujiahe Formation Yuanba area Northeastern Sichuan Basin

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川东北元坝西部须二段—须三段沉积相及其对储层控制作用

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现代地质 2024年第2期38卷 350-361页

作者：王爱肖开华刘忠群黄彦庆乔大伟中国石化石油勘探开发研究院北京100083

川东北元坝西部须二段—须三段是重要的油气产层。本文利用钻井岩心、测井资料和三维地震资料对川东北元坝西部上三叠统须二段—须三段沉积相类型、沉积特征、沉积模式及其对储层发育控制作用开展详细的研究,以指导该地区的油气勘探部... 详细信息

川东北元坝西部须二段—须三段是重要的油气产层。本文利用钻井岩心、测井资料和三维地震资料对川东北元坝西部上三叠统须二段—须三段沉积相类型、沉积特征、沉积模式及其对储层发育控制作用开展详细的研究,以指导该地区的油气勘探部署。结果表明,川东北元坝西部须二段—须三段主要为辫状河三角洲相和湖泊相沉积,能够识别出三角洲平原、三角洲前缘、前三角洲和浅湖4种亚相,可进一步划分出9种微相。须二段—须三段沉积时期发育两种沉积模式,须二段为缓坡型宽河道辫状河三角洲沉积模式,主要发育宽河道,砂体叠置连片;须三段为陡坡型窄河道辫状河三角洲沉积模式,主要发育窄河道,砂体沿河道呈条带状分布。须二段主要发育中粒长石岩屑砂岩和中粒石英砂岩两种有利储集岩类型,主要分布于三角洲前缘水下分流河道砂体中;须三段发育中粗粒钙屑砂岩和砂质细砾岩两种有利储集岩类型,主要分布于三角洲平原辫状河道—三角洲前缘水下分流河道过渡带砂体中。缓坡型宽河道辫状河三角洲中发育的中粒长石岩屑砂岩和中粒石英砂岩储层物性和孔隙结构明显好于陡坡型窄河道辫状河三角洲中发育的中粗粒钙屑砂岩和砂质细砾岩。

关键词：辫状河三角洲沉积模式优质储层须家河组川东北地区

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超高效液相色谱-串联质谱法测定罗非鱼中甲基睾酮残留

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中国渔业质量与标准 2024年第1期14卷 27-34页

作者：张杨张兵李凯华徐媛原张微肖曼吴丹张玲深圳市质量安全检验检测研究院广东深圳518055

本研究建立了超高效液相色谱-串联质谱法测定罗非鱼(Oreochroms mossambcus)中甲基睾酮残留量的分析方法。罗非鱼样品匀浆,经含有1%甲酸的乙腈溶液提取,采用QuEChERS净化粉将提取液净化除杂,水浴氮吹浓缩,流动相溶解定容。样液经BEH C1... 详细信息

本研究建立了超高效液相色谱-串联质谱法测定罗非鱼(Oreochroms mossambcus)中甲基睾酮残留量的分析方法。罗非鱼样品匀浆,经含有1%甲酸的乙腈溶液提取,采用QuEChERS净化粉将提取液净化除杂,水浴氮吹浓缩,流动相溶解定容。样液经BEH C18色谱柱分离,以含0.1%甲酸的水溶液与甲醇流动相梯度洗脱,采用UPLC-MS/MS选择电喷雾ESI正离子多反应监测模式分析检测,内标法定量。结果表明:甲基睾酮在线性范围内线性关系良好,标准曲线相关系数为0.9995,方法检出限为0.30μg/kg,定量限为1.0μg/kg。3个添加水平(n=6)下罗非鱼基质的平均回收率为98.3%~103.0%,相对标准偏差为4.2%~8.8%。优化后方法灵敏度高,准确性好,前处理过程简单、快速,适用于开展罗非鱼中甲基睾酮残留的检测。

关键词：超高效液相色谱-串联质谱罗非鱼甲基睾酮 QuEChERS 激素残留

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Characterization of favorable lithofacies in tight sandstone reservoirs and its significance for gas exploration and exploitation: A case study of the 2nd Member of Triassic Xujiahe Formation in the Xinchang area, Sichuan Basin

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Petroleum Exploration and Development 2020年第6期47卷 1194-1205页

作者： LIU Junlong LIU Zhongqun xiao kaihua HUANG Yanqing JIN Wujun Sinopec Exploration&Production Research Institute Beijing 100083China

By using core,logging curves,and experiment data,favorable lithofacies types in the 2 nd Member of Triassic Xujiahe Formation in the Xinchang area,Sichuan Basin were classified,standard of the favorable lithofacies was established,planar distribution regularities of the favorable lithofacies were identified,and forming mechanisms of the favorable lithofacies and their control effect on production were examined.(1)The 2 nd Member of Xujiahe Formation has twelve types of lithofacies,among which multiple layer medium-coarse grain sandstone lithofacies,parallel bedding medium-coarse grain sandstone lithofacies,massive bedding medium-coarse grain sandstone lithofacies,inclined bedding medium-coarse grain sandstone lithofacies,and charcoal-bearing medium-coarse grain sandstone lithofacies with better physical properties and higher gas content are favorable lithofacies;they feature low gamma,low neutron porosity,low resistivity,and high acoustic travel time on logging curves.(2)The sedimentary process controls spatial distribution of sand bodies which are the material basis of the favorable lithofacies;post diagenetic fluids would differentially reconstruct the favorable lithofacies;tectonic activities and abnormal formation pressure made strata slide along the weakness plane,giving rise to fractures in different types of rocks,which can enhance the reservoir permeability significantly.(3)The development degree of favorable lithofacies is a major factor affecting stable production of gas well.

关键词： tight sandstone reservoir favorable lithofacies reservoir characterization Triassic Xujiahe Formation Xinchang area Sichuan Basin

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Geological characteristics and models of fault-foldfracture body in deep tight sandstone of the second member of Upper Triassic Xujiahe Formation in Xinchang structural belt of Sichuan Basin,SW China

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Petroleum Exploration and Development 2023年第3期50卷 603-614页

作者： LIU Junlong LIU Zhongqun LIU Zhenfeng LIU Yali SHEN Baojian xiao kaihua BI Youyi WANG xiaowen WANG Ail FAN Lingxiao LI Jitongl Sinopec Petroleum Exploration&Production Research Institute Beijing 100083China Sinopec Southwest Oil&Gas Company Chengdu 610081China

In the second member of the Upper Triassic Xujiahe Formation(T_(3)x_(2))in the Xinchang area,western Sichuan Basin,only a low percent of reserves has been recovered,and the geological model of gas reservoir sweet spot remains unclear.Based on a large number of core,field outcrop,test and logging-seismic data,the T_(3)x_(2) gas reservoir in the Xinchang area is examined.The concept of fault-fold-fracture body(FFFB)is proposed,and its types are recognized.The main factors controlling fracture development are identified,and the geological models of FFFB are established.FFFB refers to faults,folds and associated fractures reservoirs.According to the characteristics and genesis,FFFBs can be divided into three types:fault-fracture body,fold-fracture body,and fault-fold body.In the hanging wall of the fault,the closer to the fault,the more developed the effective fractures;the greater the fold amplitude and the closer to the fold hinge plane,the more developed the effective fractures.Two types of geological models of FFFB are established:fault-fold fracture,and matrix storage and permeability.The former can be divided into two subtypes:network fracture,and single structural fracture,and the later can be divided into three subtypes:bedding fracture,low permeability pore,and extremely low permeability pore.The process for evaluating favorable FFFB zones was formed to define favorable development targets and support the well deployment for purpose of high production.The study results provide a reference for the exploration and development of deep tight sandstone oil and gas reservoirs in China.

关键词： fault-fold-fracture body fracture control factor genetic characteristics geological model deep layer tight sandstone Xinchang structural belt Upper Triassic Xujiahe Formation Sichuan Basin

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黄春华从痰饮论治前庭性偏头痛经验介绍

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江西中医药大学学报 2024年第1期36卷 20-22页

作者：陈昕吴清忠肖俊锋饶凯华许雪梅饶旺福黄春华广东省中医院珠海医院广东珠海519015 江西中医药大学南昌330004 江西中医药大学附属医院南昌330006

黄春华于多年的临床实践中,认识到前庭性偏头痛多由脾阳受损、痰饮停于中焦所致,故当以健脾利水、温阳化饮为基本治则。总结黄春华治疗前庭性偏头痛的经验。并附验案1则以飨同道。

关键词：痰饮前庭性偏头痛临证经验

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Mo-based perpendicularly magnetized thin films with low damping for fast and low-power consumption magnetic memory

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Science China(Physics,Mechanics & Astronomy) 2022年第8期65卷 129-139页

作者： Houyi Cheng Boyu Zhang Yong Xu Shiyang Lu Yuxuan Yao Rui xiao kaihua Cao Yongshan Liu Zilu Wang Renyou Xu Danrong Xiong Yan Wang Helin Ma Sylvain Eimer Chao Zhao Weisheng Zhao Fert Beijing Institute Ministry of Industry and Information Technology Key Laboratory of SpintronicsSchool of Integrated Circuit Science and EngineeringBeihang UniversityBeijing100191China Hefei Innovation Research Institute Anhui High Reliability Chips Engineering LaboratoryBeihang UniversityHefei230013China Beihang-Geortek Joint Microelectronics Institute Qingdao Research InstituteBeihang UniversityQingdao266000China Beijing Superstring Academy of Memory Technology Beijing100176China

Perpendicular magnetic anisotropy-based magnetic tunnel junctions(p-MTJs) with low Gilbert damping constant(α) are of particular interest for fast and low-power consumption magnetic random-access memory(MRAM). However, obtaining a faster switching speed and lower power consumption is still a big challenge. Herein, we report a Mo-based perpendicular double free layer structure with a low Gilbert damping constant of 0.02 relative to W-based films, as measured by time-resolved magnetooptical Kerr effect equipment. To show the influence of different film structures on the Gilbert damping constant, we measured the Mo-based single free layer. Thereafter, we deposited the full stacks with the Mo-based double free layer and obtained a high tunneling magnetoresistance of 136.3% and high thermal stability. The results of high-resolution transmission electron microscopy(HR-TEM) and energy-dispersive X-ray spectroscopy(EDS) showed that the Mo-based films had better crystallinity,sharper interfaces, and weaker diffusion than the W-based films and thus produced a weaker external contribution of the Gilbert damping constant. As a result of the weak spin-orbit coupling in the Mo-based structure, the intrinsic contribution of the Gilbert damping constant was also weak, thereby leading to the small Gilbert damping constant of the Mo-based stacks. In addition, the macro-spin simulation results demonstrated that the magnetization switching by the spin transfer torque of the Mo-based MTJs was faster than that of the W-based MTJs. These findings help to understand the mechanism behind the good performance of Mo-based p-MTJ films and show the great promise of these structures in low-power consumption MRAM or other spintronic devices.

关键词： CoFeB/MgO Gilbert damping constant perpendicular magnetic anisotropy fast and low-power consumption memory magnetic tunnel junctions

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Unsupervised Feature Selection Using Structured Self-Representation

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Journal of Harbin Institute of Technology(New Series) 2018年第3期25卷 62-73页

作者： Yanbei Liu kaihua Liu xiao Wang Changqing Zhang Xianchao Tang School of Electronic Information Engineering Tianjin University Department of Computer Science and Technology Tsinghua University School of Computer and Science Technology Tianjin University

Unsupervised feature selection has become an important and challenging problem faced with vast amounts of unlabeled and high-dimension data in machine learning. We propose a novel unsupervised feature selection method using Structured Self-Representation( SSR) by simultaneously taking into account the selfrepresentation property and local geometrical structure of features. Concretely,according to the inherent selfrepresentation property of features,the most representative features can be selected. Mean while,to obtain more accurate results,we explore local geometrical structure to constrain the representation coefficients to be close to each other if the features are close to each other. Furthermore,an efficient algorithm is presented for optimizing the objective function. Finally,experiments on the synthetic dataset and six benchmark real-world datasets,including biomedical data,letter recognition digit data and face image data,demonstrate the encouraging performance of the proposed algorithm compared with state-of-the-art algorithms.

关键词： unsupervised feature selection local geometrical structure self-representation property high-dimension data

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CEPR机组CRDM役前检查方案优化

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核动力工程 2020年第4期41卷 178-180页

作者：肖开华邵春兵中广核台山核电合营有限公司广东台山529228

某CEPR机组的控制棒驱动机构(CRDM)耐压壳安装完成后,发现此批次CRDM焊接见证件试验存在不合格样品。为缩短CRDM更换工期,降低对于项目整体进度的影响,在对CRDM耐压壳更换过程中通过深入研究役前检查规范,提出了一种新的役前检查策略。... 详细信息

某CEPR机组的控制棒驱动机构(CRDM)耐压壳安装完成后,发现此批次CRDM焊接见证件试验存在不合格样品。为缩短CRDM更换工期,降低对于项目整体进度的影响,在对CRDM耐压壳更换过程中通过深入研究役前检查规范,提出了一种新的役前检查策略。经实践表明,采用优化后的役前检查方案,在10 d内即完成了全部CRDM的离线役前检查,较最初的计划提前了约20 d;通过对安装后的部分CRDM进行超声和涡流检查,发现离线和在线检查结果一致,并且在线检查不存在可达性问题。

关键词：控制棒驱动机构(CRDM) 役前检查 CEPR

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双管齐下是否更优?企业研发税收优惠政策组合一致性研究

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管理评论 2022年第1期34卷 92-105页

作者：寇明婷魏建武肖明陈凯华北京科技大学经济管理学院北京100083 中国科学院科技战略咨询研究院北京100190

现有文献缺乏从政策组合的一致性角度对不同研发税收优惠政策间交互作用的关注。本文以高科技企业微观数据为样本,同时面向企业研发活动的投入端和产出端,基于负二项回归模型,运用层次回归的方法揭示研发费用加计扣除政策和所得税税收... 详细信息

现有文献缺乏从政策组合的一致性角度对不同研发税收优惠政策间交互作用的关注。本文以高科技企业微观数据为样本,同时面向企业研发活动的投入端和产出端,基于负二项回归模型,运用层次回归的方法揭示研发费用加计扣除政策和所得税税收优惠政策对企业研发活动的激励效果,并聚焦二者间的交互效应来分析政策组合效应的一致性。实证研究表明:单独考虑两项政策效果时,研发费用加计扣除政策和所得税税收优惠政策对企业研发活动的资金投入、人员投入以及研发活动的专利产出均有正向激励作用,且研发费用加计扣除政策更优;然而,在同时考虑两项政策对企业研发活动的组合效果时,无论是在投入端还是在产出端,两项政策间均存在负向交互效应,即两项政策在激励企业研发活动的投入和产出时会相互干扰,一致性较弱,进而造成政策激励效果的损失。本文的研究结果可为提升我国研发财税政策的有效性和精准性提供政策启示。

关键词：研发费用加计扣除政策所得税税收优惠政策政策组合一致性研发投入与产出

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