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Petroleum geological features and hydrocarbon enrichment of Linhe Depression in Hetao Basin, NW China

石油勘探与开发:英文版 2023年第4期50卷 798-811页

作者： ZHANG Ruifeng HE Haiqing Zhu Qingzhong CHEN Shuguang LIU Xiheng DAN Weining hu yanxu SHI Yulei ZHANG Yufei YU Haijun ZHANG Ximeng PetroChina huabei Oilfield Company Renqiu 062552China PetroChina Oil&Gas and New Energy Company Beijing 100007China Logging Technology Research Institute of CNPC Logging Company Beijing 100007China No.2 Mud Logging Company CNPC Bohai Drilling Engineering Company LimitedRenqiu 062552China

Based on paleogeomorphology, drilling and seismic data, this paper systematically studies the structural and sedimentary evolution, source rock characteristics, reservoir characteristics and formation mechanism, hydrocarbon accumulation model and enrichment law in the Linhe Depression of the Hetao Basin, NW China. The Hetao Basin mainly experienced three stages of evolution, namely, weak extensional fault depression, strong extensional fault depression and strike-slip transformation, giving rise to four positive structural belts(Jilantai, Shabu, Nalinhu and Xinglong), which are favorable areas for oil and gas accumulation. The two main saline lacustrine source rocks, Lower Cretaceous Guyang Formation and Oligocene Linhe Formation, are characterized by high sulfur content, rich algae, early maturity, early expulsion, and wide oil generation window. The large structural transition belt in the intermountain area around the Hetao Basin controls the formation of large-scale braided river delta deposits, which are characterized by high quartz content(50%-76%), long-term shallow burial and weak compaction, low cement content, and good reservoir properties in delta front sandbody. The burial depth of the effective Paleogene reservoirs is predicted to reach 8000 m. Three hydrocarbon accumulation models, nose-uplift near sag, buried hill surrounding sag, fault nose near source rock, are constructed. The law of hydrocarbon accumulation in the Linhe Depression is finally clarified as follows: near-source around the depression is the foundation, high-quality thick reservoir is the premise, good tectonic setting and trap conditions are the key.

关键词： Hetao Basin Linhe Depression Cretaceous Guyang Formation Paleogene Linhe Formation Jilantai Oilfield Bayan Oilfield hydrocarbon enrichment law

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Geochronological Records of Oil-Gas Accumulations in the Permian Reservoirs of the Northeastern Ordos Basin

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Acta Geologica Sinica(English Edition) 2013年第6期87卷 1701-1711页

作者： CHEN Gang YANG Fu LI Shuheng ZHANG huiruo hu yanxu LEI Panpan State Key Laboratory of Continental Dynamics Department of Geology Northwest University Changqing Oilfield Company PetroChina Company Limited CNPC

Geochronology of oil-gas accumulation （OGA） is a challenging subject of petroleum geology in multi-cycle superimposed basins.By K-Ar dating of authigenic illite （AI） and fluid inclusion （FI） analysis combined with apatite fission track （AFT） thermal modeling,a case study of constraining the OGA times of the Permian reservoirs in northeast Ordos basin （NOB） has been conducted in this paper.AI dating of the Permian oil-gas-bearing sandstone core-samples shows a wide time domain of 178-108 Ma.The distribution of the AI ages presents 2-stage primary OGA processes in the Permian reservoirs,which developed in the time domains of 175-155 Ma and 145-115 Ma with 2-peak ages of 165 Ma and 130 Ma,respectively.The FI temperature peaks of the samples and their projected ages on the AFT thermal path not only present two groups with a low and a high peak temperatures in ranges of 90-78℃ and 125-118℃,respectively corresponding to 2-stage primary OGA processes of 162-153 Ma and 140-128 Ma in the Permian reservoirs,but also appear a medium temperature group with the peak of 98℃ in agreement with a secondary OGA process of c.～30 Ma in the Upper Permian reservoirs.The integrated analysis of the AI and FI ages and the tectono-thermal evolution reveals that the Permian reservoirs in the NOB experienced at least 2-stage primary OGA processes of 165-153 Ma and 140-128 Ma in agreement with the subsidence thermal process of the Mid-Early Jurassic and the tectono-thermal event of the Early Cretaceous.Then,the Upper Permian reservoirs further experienced at least 1-stage secondary OGA process of c.～30 Ma in coincidence with a critical tectonic conversion between the slow and the rapid uplift processes from the Late Cretaceous to Neogene.

关键词： northeast Ordos basin （NOB） Permian sandstone reservoirs oil-gas accumulation （OGA） geochronology

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A soft actor-critic deep reinforcement learning method for multi-timescale coordinated operation of microgrids

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Protection and Control of Modern Power Systems 2022年第1期7卷 423-432页

作者： Chunchao hu Zexiang Cai yanxu Zhang Rudai Yan Yu Cai Bowei Cen School of Electric Power South China University of TechnologyGuangzhouChina China Southern Power Grid Electrical Technology Co. LTDGuangzhouChina Guangdong Provincial Key Laboratory of New Technology for Smart Grid GuangzhouChina School of Electrical and Electronic Engineering Nanyang Technological UniversitySingaporeSingapore School of Electrical and Electronic Engineering South China University of TechnologyGuangzhou 510640China.

This paper develops a multi-timescale coordinated operation method for microgrids based on modern deep rein-forcement learning.Considering the complementary characteristics of different storage devices,the proposed approach achieves multi-timescale coordination of battery and supercapacitor by introducing a hierarchical two-stage dispatch model.The first stage makes an initial decision irrespective of the uncertainties using the hourly predicted data to minimize the operational cost.For the second stage,it aims to generate corrective actions for the first-stage decisions to compensate for real-time renewable generation fluctuations.The first stage is formulated as a non-convex deterministic optimization problem,while the second stage is modeled as a Markov decision process solved by an entropy-regularized deep reinforcement learning method,i.e.,the Soft Actor-Critic.The Soft Actor-Critic method can efficiently address the exploration-exploitation dilemma and suppress variations.This improves the robustness of decisions.Simulation results demonstrate that different types of energy storage devices can be used at two stages to achieve the multi-timescale coordinated operation.This proves the effectiveness of the proposed method.

关键词： Microgrid operation Hybrid energy storage system Deep reinforcement learning

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深层—超深层优质碎屑岩储层成因及主控因素——以河套盆地临河坳陷古近系渐新统临河组为例

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石油勘探与开发 2024年第3期51卷 478-489页

作者：史原鹏刘占国王少春伍劲刘喜恒胡延旭陈树光冯广业王标王浩宇中国石油华北油田公司河北任丘062552 中国石油杭州地质研究院杭州310023

基于岩心、钻井和测井等新资料,结合大量岩矿测试分析,对河套盆地临河坳陷古近系渐新统临河组深层—超深层碎屑岩储层特征、成岩作用类型、异常高孔储层成因及发育控制因素开展系统分析。研究表明:(1)临河组深层—超深层碎屑岩异常高孔... 详细信息

基于岩心、钻井和测井等新资料,结合大量岩矿测试分析,对河套盆地临河坳陷古近系渐新统临河组深层—超深层碎屑岩储层特征、成岩作用类型、异常高孔储层成因及发育控制因素开展系统分析。研究表明:(1)临河组深层—超深层碎屑岩异常高孔储层储集空间以原生孔为主,抗压实能力强的物质组构基础、弱压实成岩动力场和流体弱压实-弱胶结成岩环境等3大有利成岩要素耦合利于原生孔大量保存;(2)临河组碎屑岩先存物质组构优越,石英、长石和刚性岩屑总含量平均值可达90%,抗压实能力强;(3)临河坳陷地温梯度低,仅为(2.0~2.6)℃/100 m,与早期长期浅埋—晚期快速深埋的埋藏方式共同形成弱压实成岩动力场环境;(4)咸化湖盆沉积地层的成岩环境中,成岩流体产生的压实作用弱,同时古盐度具有分异性,低盐度区胶结作用弱,利于原生孔保存;(5)沉积水动力条件、咸化湖盆古水体盐度分异和砂体厚度等3大因素共同控制临河组优质储层分布。

关键词：河套盆地临河坳陷古近系渐新统临河组深层—超深层异常高孔储层成因

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Using Impervious Surfaces to Detect Urban Expansion in Beijing of China in 2000s

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Chinese Geographical Science 2016年第2期26卷 229-243页

作者： PENG Jian LIU yanxu SHEN Hong XIE Pan hu Xiaoxu WANG Yanglin Laboratory for Earth Surface Processes Ministry of Education College of Urban and Environmental Sciences Peking University

The change of impervious surface area(ISA) can effectively reveal the gradual process of urbanization and act as a key index for monitoring urban expansion. Experiencing rapid growth of the built environment in the 2000 s, urban expansion of Beijing has not been fully characterized through ISA. In this study, Landsat TM images of Beijing in 2001 and 2009 were obtained, and the eight-year urban expansion process in Beijing was analyzed using the ISA extracted by means of the vegetation-imperious surface-soil(V-I-S) model. From the spatial variation in ISA, the ring structure of urban expansion in Beijing was significant during the study period, with decreasing urban density from the city center to the periphery. In the ring road analysis, the most dramatic changes of ISA were found between the fifth ring and the sixth ring. This area has experienced the most new residential development, and is currently the main source of urban expansion. The typical profile lines revealed the directional characteristics of urban expansion. The east-west profile was the most urbanized axes in Beijing, while ISA change in the east-north profile was more significant than in the other five profiles. Moreover, the transition matrix of ISA levels revealed an increase in urban density in the low density built areas; the Moran′s I index showed a clear expansion of the central urban area, which spread contiguously; and the standard deviational ellipse indicated the northeast was the dominant direction of urban expansion. These findings can provide important spatial control guidelines in the next round of national economic and social development planning, overall urban and rural planning, and land use planning.

关键词：城市扩张不透水北京表面检测 Landsat 城市化进程城市中心区中国

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临河坳陷北部古近系临河组超深层油气藏形成条件与勘探前景

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中国石油勘探 2024年第1期29卷 119-129页

作者：张锐锋陈树光冯广业师玉雷胡延旭孙瑞娜万照飞武函田思思张宇飞汪关妹周然然罗玉财王孝超张晰蒙中国石油华北油田公司中国石油油气和新能源分公司中国石油集团东方地球物理公司华北研究中心中国石油集团测井有限公司院士工作站

近年来,通过加大深层—超深层碎屑岩晚期油气成藏地质认识研究,在河套盆地临河坳陷实现了超深层碎屑岩油气勘探的重大发现。基于对临河坳陷古近系烃源岩热模拟、钻录试井资料及成储成藏演化分析,主要形成3点地质认识:(1)临河坳陷北部古... 详细信息

近年来,通过加大深层—超深层碎屑岩晚期油气成藏地质认识研究,在河套盆地临河坳陷实现了超深层碎屑岩油气勘探的重大发现。基于对临河坳陷古近系烃源岩热模拟、钻录试井资料及成储成藏演化分析,主要形成3点地质认识:(1)临河坳陷北部古近系发育富含树脂体(陆源)和藻类体(水生)的优质烃源岩,该烃源岩在低演化阶段开始大量生排烃,具有生烃强度大、生烃窗口宽的特点,淖西洼槽带超深层热演化程度相对较高,油气资源潜力大;(2)发育远源水浅坡缓大型辫状河三角洲沉积,砂体广覆式分布,受低地温、晚深埋、高石英含量、弱压实、弱胶结等弱成岩因素影响,形成了以弱成岩保孔主导、叠加后生超高压改造扩缝的成储新机制,储层物性好,极大拓展了超深层油气勘探空间;(3)生烃期早充注、持续沉降深埋热演化、加速生排烃和持续充注形成过饱和与超高压油气藏,而超高压一旦超过储源交互体破裂压力,形成缝孔连通、源储同聚、连续型大面积展布的常规油气成藏新认识,有力提高了超深层常规油气藏勘探潜力。临河坳陷北部古近系临河组超深层油气成藏条件优越,有利勘探区规模大,展现了良好的勘探前景,同时进一步丰富了超深层碎屑岩晚期油气成藏理论认识,对类似盆地尤其是万米超深层的源内勘探具有重要指导意义。

关键词：临河坳陷古近系超深层超高压千吨井

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Steroidal saponins with anti-inflammatory activity from Tribulus terrestris L.

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Acupuncture and Herbal Medicine 2022年第1期2卷 41-48页

作者： Miaojie Yang Mahmood Brobbey Oppong Jingrui Di Qing Yuan yanxu Chang Miaomiao Jiang Shijie Cao Pengzhi Dong Lin Li Yan Xie Xiaoying Luan Limin hu Lijuan Chai Peng Zhang Tianjin State Key Laboratory of Component-based Chinese Medicine Institute of Traditional Chinese MedicineTianjin University of Traditional Chinese MedicineTianjinChina Tianjin Key Laboratory of Phytochemistry and Pharmaceutical Analysis Tianjin University of Traditional Chinese MedicineTianjinChina Department of Pharmaceutical Chemistry School of PharmacyCollege of Health SciencesUniversity of GhanaGhana

Objective:Tribulus terrestris L.(T.terrestris)is a highly valuable traditional Chinese medicine used to treat stroke,inflammation,pulmonary fibrosis,liver cancer,and urolithiasis.To identify the basic substance responsible for the anti-inflammatory effect of TST(total saponins of Tribulus),its chemical composition was systematically studied,and its effect of inhibiting nitric oxide generation and the expression of related inflammatory factors were determined.Methods:To separate chemical constituents from T.terrestris by column chromatography.Spectroscopic methods,including 1D and 2D nuclear magnetic resonance spectroscopy(NMR)and mass spectrometry(MS)techniques,were used to elucidate the isolated compounds.The anti-inflammatory activities of TST and several compounds were evaluated in vitro.Results:Fifteen steroidal saponins,including 9 furostanol steroidal saponins(1,2,3,4,5,6,7,8,and 15)and 6 isospirostanol steroidal saponins(9,10,11,12,13,and 14),were isolated from T.terrestris.TST significantly decreased the expression of tumor necrosis factor-a(TNF-a)and interleukin-6(IL-6)in RAW 264.7 cells stimulated by lipopolysaccharides.Compounds 13 and 15 evidently reduced TNF-a expression.Compounds 6,10,12,13,and 15 markedly reduced IL-6 expression.Conclusions:Compounds 1 was a novel furostanol steroidal saponin,named 26-O-b-D-glucopyranosyl-(25R)-5afurostan-12-carbonyl-20(22)-en-3b,26-diol-3-O-{b-D-xylopyranosyl-(1→2)-[b-D-xylopyranosyl-(1→3)]-b-D-glucopyranosyl-(1→4)-[a-L-rhamnopyranosyl-(1→2)]-b-D-galactopyranoside}.Compounds 2 was isolated from the family Zygophyllaceae for the first time,and 5 and 6 were isolated from the Tribulus genus.TST and compounds 6,10,12,13,and 15 exerts antiinflammatory activity.

关键词： Interleukin-6 Nitric oxide(NO)inhibition Steroidal saponins Tribulus terrestris L. Tumor necrosis factor-a

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Research on China's high-grade highway design index of asphalt pavement with granular base

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Research in Cold and Arid Regions 2013年第4期5卷 498-502页

作者： XiuShan Wang TaoTao Fan yanxu Gao Yi hu College of Architectural Engineering Zhejiang Sci-Tech University

Based on the 2006 Chinese asphalt pavement deflection value design index, we used KENLAYER Pavement Analysis and Design software and lstOpt statistical analysis software to can-y on the nonlinear regression, this paper establish high-grade highway design equations for the compressive slrain of soil sub-base top （CSSBT） and the radial compressive stress of semi-rigid base top （RCSRBT）. The correlation coefficients inspection standard to get precise proof, which means that our granular base design equations have high credibility and can be used in the Chinese design index of asphalt pavement with granular base （APGB）.

关键词： granular base semi-rigid base compressive strain radial compressive stress

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从光谱指数到融合数据集的全球植被遥感数据产品

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地理学报 2022年第5期77卷 1102-1119页

作者：邱思静胡涛胡熠娜丁子涵刘焱序彭建北京大学城市与环境学院地表过程分析与模拟教育部重点实验室北京100871 上海师范大学环境与地理科学学院上海200234 上海师范大学城市发展研究院上海200234 北京师范大学地理科学学部地表过程与资源生态国家重点实验室北京100875

遥感对地观测为理解陆地植被动态与全球环境变化规律提供了数据基础,基于卫星观测的全球植被遥感数据产品近年来层出不穷,但缺乏基于数据使用者视角的系统梳理。本文回顾了全球植被遥感数据产品的发展历程,梳理了相关卫星计划及对应数... 详细信息

遥感对地观测为理解陆地植被动态与全球环境变化规律提供了数据基础,基于卫星观测的全球植被遥感数据产品近年来层出不穷,但缺乏基于数据使用者视角的系统梳理。本文回顾了全球植被遥感数据产品的发展历程,梳理了相关卫星计划及对应数据产品,分析了从植被光谱指数到生物物理特征参量、传统光学遥感反演到叶绿素荧光及星载微波反演产品、从单一传感器生产到多数据源—多数据集融合产品的发展脉络,阐述了全球植被遥感数据产品的来源、特征与关联关系。认为当前全球植被遥感数据产品的生产与应用存在一定脱节,遥感产品精度制约了对地球系统的深入理解。全球植被遥感数据产品正从宏观状态监测向专业化、精细化、标准化转变,建议未来制备全球遥感数据产品应充分利用目前已积累的长时序观测数据,融合多源观测资料,提升现有数据集的时空分辨率、精度及连续性;注重提高特殊区域与特定类型生态系统的反演精度,加强多维植被特征的一体化监测;建立全球植被产品数据共享平台,提供标准的全流程数据处理与分发服务,将数据不确定性信息高效、清晰提供给用户。

关键词：植被遥感植被动态遥感数据产品不确定性数据集

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Association of HLA-B Alleles With human Immunodeficiency Virus Type 1 Infection in the Yi Ethnic Group in Sichuan Province

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Biomedical and Environmental Sciences 2004年第2期17卷 203-208页

作者： MING-yanxu KUN-XUEHONG XIAO-LINGDENG JUNLI HONGPENG Yu-huARUAN GUAN-MINGQIN huIXING XIAO-huXU ANDYI-MINGSHAO DivisionofResearchonVirologyandImmunology NationalCenterforSTD／AIDSControlandPreventionBeijing100050China DepartmentofForensicMedicine ShantouUniversityMedicalCollegeShantou515041GuangdongChina SichuanProvincialCenterforDiseaseControlandPrevention Chengdu61003SichuanChina

Objective To determine the distribution of HLA-B alleles in the Chinese Yi ethnic group and its association with HIV infection. Methods One hundred and six unrelated healthy HIV negative and 73 HIV positive Chinese Yi ethnic individuals were typed by PCR-SSP. Results The frequency of alleles B*07, B*35, and B*46 were increased in HTV-1 -positive subjects, whereas the alleles B*55, B*44 and B*78 were absent in the HIV-infected persons studied. The B*46 allele was present in a significantly higher gene frequency among HIV-1-positive individuals (P=0.02, OR=3.32, 95% CI=1.13-9.78) compared with control subjects. Conclusion HLA-B*46 may be associated with its susceptibility to HIV-1 infections.

关键词： HIV infections HLA-B alleles Association

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