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Characteristics of microscopic pore heterogeneity and development model of Wufeng‒Longmaxi Shales in the Pengshui area of south-east Chongqing

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Frontiers of Earth Science 2024年第1期18卷 188-203页

作者： Lu SUN Zhigang WEN Guisong HE peixian zhang Chenjun WU Liwen zhang Yingyang XI Bo LI College of Resources and Environment Yangtze UniversityWuhan 430100China Research Institute of Exploration and Development Sinopec East China CompanyNanjing 210011China

Normal-pressure shale gas reservoirs are widely distributed in south-eastern Chongqing and show good potential for resource *** paper reports the organic matter(OM),physical,and pore characteristics,mineral composition,and gas content of representative shale samples from the Upper Ordovician Wufeng Formation and Member 1 of the Lower Silurian Longmaxi Formation(Long 1 Member).Microscopic pores within different shale layers of the Long 1 Member were classified,quantitatively evaluated,and their development mechanisms were systematically *** found that OM characteristics,mineral composition,and pore type were the main factors affecting the enrichment and preservation of shale *** characteristics of the Long 1 Member are mainly controlled by changes in the sedimentary *** are evident differences in total organic carbon content and mineral composition vertically,leading to a variable distribution of pores across different *** matter abundance controls the degree of OM pore development,while clay minerals abundance control the development of clay mineral-related *** organic carbon content generally controls the porosity of the Long 1 Member,but clay minerals also play a role in OM-poor *** connectivity and permeability are influenced by the development of pores associated with brittle *** propose a microscopic pore development model for the different *** geochemical data and this pore development model,layers 1‒4 are considered to be excellent shale gas preservation and enrichment *** preservation conditions in layers 5‒7 result in high levels of shale gas *** 8‒9 possess a better sealing condition compared with layers 5‒7 and are conducive to the enrichment and preservation of shale gas,and can thus be used as future potential target *** research provides a theoretical basis for exploring and evaluating shale gas potential in the studied region or other co

关键词： shale gas pore characteristics Longmaxi Formation reservoir model

Synthesis,structure,and thermal expansion in CaZrF_(6) with two polymorphs

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Nano Research 2024年第9期17卷 8618-8626页

作者： peixian zhang Yongqiang Qiao Kaiyue Zhao Qingjie Wang Huan Zhao Juan Guo Erjun Liang Tao Sun Jiangwei zhang Qilong Gao Key Laboratory of Materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China College of Energy Materials and Chemistry Inner Mongolia UniversityHohhot 010021China First Affiliated Hospital of Dalian Medical University 222 Zhongshan RoadDalian 116011China Ordos Laboratory Ordos 017000China

Due to the high structural flexibility and controllable thermal expansion,cubic double ReO_(3)-type negative thermal expansion(NTE)fluorides provide a solution for solving the prominent phenomenon of thermal expansion mismatch between ***,the expensive raw materials and complex synthesis steps limit its practical *** this work,we have designed a more advantageous method for the synthesis of NTE material CaZrF_(6),and it is expected to be generalized to the synthesis of other double ReO_(3)-***,a new orthorhombic phase CaZrF_(6) has been synthesized via this method in a lower *** the strong isotropic NTE of the cubic phase CaZrF_(6),the orthorhombic phase shows the strong anisotropic positive thermal expansion(PTE).The combined analysis of temperature-dependent X-ray diffraction(XRD),Raman spectra,and first-principles calculations shows that the low frequency phonon vibration mode with negative Grüneisen parameter in cubic CaZrF_(6) are strongly correlated with the transverse thermal vibration of F atoms and dominates the NTE of the material.

关键词： negative thermal expansion fluorides polymorph lattice dynamics first principles calculations

热消融联合经皮肺穿刺活检术在肺结节诊治中应用的研究进展

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微创医学 2024年第4期19卷 429-433页

作者：段雪琴郭欢张培先昆明医科大学研究生学院云南省昆明市650500 昆明医科大学附属延安医院肿瘤科云南省昆明市650051 云南省肿瘤免疫防治研究重点实验室云南省昆明市650051

肺结节因与早期肺癌密切相关而备受关注。经皮肺穿刺活检术(PTNB)是明确肺结节性质的方式之一,但对于肺小结节和磨玻璃结节而言,存在取材难度大、诊断准确率低、并发症多等问题。热消融作为一种精准的微创技术,逐渐成为不能手术或拒绝... 详细信息

肺结节因与早期肺癌密切相关而备受关注。经皮肺穿刺活检术(PTNB)是明确肺结节性质的方式之一,但对于肺小结节和磨玻璃结节而言,存在取材难度大、诊断准确率低、并发症多等问题。热消融作为一种精准的微创技术,逐渐成为不能手术或拒绝手术的早期肺癌患者的重要治疗方式。热消融联合PTNB可同时诊断和治疗高危肺结节。一方面热消融可利用热生物学效应直接杀灭肿瘤细胞,另一方面局部高温可凝固肺内的小血管,起到迅速止血和预防出血的效果,降低并发症发生率。现就热消融联合PTNB在诊治肺结节中的应用进展及相关问题进行概述。

关键词：肺结节磨玻璃结节肺癌穿刺活检消融

高寒泥炭沼泽菵草与藏嵩草种群空间分布格局及其关联性

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生态学杂志 2024年第6期43卷 1621-1628页

作者：吴娴诗赵成章马昕宇王苏红张培贤黄承璐李戈杨西北师范大学地理与环境科学学院甘肃省湿地资源保护与产业发展工程研究中心兰州730070

探讨高寒泥炭沼泽植物的空间分布格局及其对环境响应,对于认识高寒泥炭沼泽的物质循环机制具有重要意义。在青藏高原东缘的狼渡滩泥炭沼泽湿地,设置常年积水区(Ⅰ)、季节性积水区(Ⅱ)、阶段性积水区(Ⅲ)3个水位样地,采用小尺度点格局分... 详细信息

探讨高寒泥炭沼泽植物的空间分布格局及其对环境响应,对于认识高寒泥炭沼泽的物质循环机制具有重要意义。在青藏高原东缘的狼渡滩泥炭沼泽湿地,设置常年积水区(Ⅰ)、季节性积水区(Ⅱ)、阶段性积水区(Ⅲ)3个水位样地,采用小尺度点格局分析方法,分析了不同水位下菵草和藏嵩草种群的空间分布格局及种间关联关系。结果表明:(1)随着地表积水深度的下降,湿地群落优势种由菵草演变为藏嵩草,土壤有机碳含量逐渐减少,而土壤全氮和土壤全磷呈现增加趋势;(2)从常年积水区到阶段性积水区,菵草种群空间格局由聚集分布转变为随机分布;藏嵩草种群空间格局由随机分布转变为聚集分布;(3)在常年积水区和阶段性积水区菵草和藏嵩草的空间关联性表现为负相关和不相关,在季节性积水区表现为负相关。高寒泥炭沼泽淹水条件、微地貌、土壤养分空间异质性影响了种群的空间分布格局和种间关联性,反映了高寒泥炭沼泽植物的生态适应性策略。

关键词：菵草藏嵩草小尺度点格局种间关联高寒泥炭沼泽

低级别逆断层对页岩气富集高产影响研究——以四川盆地东南缘南川地区平桥东1断层为例

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油气藏评价与开发 2024年第3期14卷 458-467页

作者：高全芳张培先关琳琳李彦婧倪锋页岩油气富集机理与高效开发全国重点实验室北京100083 中国石化华东油气分公司勘探开发研究院江苏南京210019

南川地区位于四川盆地东南缘的复杂构造区,低级别逆断层较为发育,基于区域构造分析及构造精细解释开展逆断层形成机制及分布规律研究,并结合地震属性预测、钻井、压裂及试气试采等资料,以平桥东1断层为例,开展了低级别逆断层对页岩储集... 详细信息

南川地区位于四川盆地东南缘的复杂构造区,低级别逆断层较为发育,基于区域构造分析及构造精细解释开展逆断层形成机制及分布规律研究,并结合地震属性预测、钻井、压裂及试气试采等资料,以平桥东1断层为例,开展了低级别逆断层对页岩储集性能、保存条件、压裂改造影响的分析,以揭示其对页岩气富集高产的影响。研究表明:南川地区低级别逆断层的形成主要受控于燕山中期—燕山晚期的江南—雪峰隆起的陆内造山作用的远程传导以及区域挤压应力场的变化影响,其走向整体呈北东向、北北东向,断层规模较小。平桥东1断层伴生大量天然裂缝,有效改善了储集性能,且未破坏保存条件,有利于页岩气富集成藏、地应力释放及压裂改造形成复杂缝网,实现单井高产。低级别断层附近可作为目标优选和井位部署的有利区,有效指导了复杂构造区页岩气勘探开发。

关键词：南川地区平桥东1断层低级别逆断层页岩气富集高产

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海陆过渡相与海相页岩气储层特征差异性分析——以南川地区龙潭组与龙马溪组为例

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海洋地质前沿 2024年第10期40卷 49-60页

作者：刘娜娜张培先夏威高全芳汪凯明周頔娜中国石油化工股份有限公司华东油气分公司南京210019

南川地区发育海陆过渡相、海相2种沉积类型的页岩层系,以龙马溪组为代表的海相页岩气实现了商业开发,而对以龙潭组为代表的海陆过渡相页岩气的认识程度较低。利用野外露头、钻井岩芯、薄片及氩离子抛光扫描电镜等实验数据和地层微电阻... 详细信息

南川地区发育海陆过渡相、海相2种沉积类型的页岩层系,以龙马溪组为代表的海相页岩气实现了商业开发,而对以龙潭组为代表的海陆过渡相页岩气的认识程度较低。利用野外露头、钻井岩芯、薄片及氩离子抛光扫描电镜等实验数据和地层微电阻率扫描成像(FMI)测井等资料,从沉积相、岩性组合、储集条件、矿物组分、可压性及含气性等方面,开展这2套页岩储层特征的差异性分析。结果表明,2套储层在以上方面都存在较大差异:①龙潭组岩性复杂,发育粉砂质页岩、炭质页岩、灰质页岩、灰岩及煤层,而龙马溪组主要以硅质页岩为主;②受岩性、有机质类型及热演化程度影响,龙潭组储集空间主要以微裂缝(粒缘缝和收缩缝)和无机孔为主,而龙马溪组主要以有机质孔和微裂缝为主;③龙潭组页岩黏土矿物含量高(47.6%),脆性矿物含量低(35.8%),杨氏模量低(32.3 GPa),泊松比高(0.3),塑性较强,可压性差于龙马溪组页岩;④龙潭组页岩含气量平均为2.2 m^(3)/t,吸附气占比54.5%,而龙马溪组页岩含气量平均为5.2 m^(3)/t,吸附气占比43.3%。通过2套页岩层系储层差异性分析,明确了龙潭组页岩储层具有岩性复杂、黏土矿物含量高、可压性差、吸附气占比高的特征。龙潭组谭一段页岩连续厚度大、含气量高、储集物性好,从整体性评价来看,是龙潭组的“甜点”段;但其黏土矿物含量也高,且地质“甜点”与工程“甜点”的耦合性较龙马溪组页岩差,建议优化压裂工艺,提高缝网改造体积和单井产量,实现勘探突破。

关键词：海陆过渡相海相龙潭组页岩气储层特征差异性

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Evaluation of sweet spots and horizontal-well-design technology for shale gas in the basin-margin transition zone of southeastern Chongqing,SW China

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能源地球科学(英文) 2020年第3期1卷 134-146页

作者： Xipeng He peixian zhang Guisong He Yuqiao Gao Ming Liu Yong zhang Dazhi Fang Yanjing Li Research Institute of Exploration and Development Sinopec East China CompanyNanjingJiangsu210011China

The shale gas accumulation conditions in the basin-margin transition zone of southeastern Chongqing in SW China are *** order to improve single-well productivity in this area,the geologic characteristics,major factors controlling the occurrence of sweet spots,and drilling/fracturing optimization were investigated in this *** sweet spot evaluation system and criteria were established,and the horizontal-well-design technology was *** following three conclusions were ***,the accumulation and high-productivity-oriented approaches for sweet spot evaluation are proposed and the criteria are established based on screened key ***,the horizontal well was designed based on:(1)the“six-map”method,to identify both the geology and engineering sweet spots for well locations;and(2)seismic attributes,to predict the development of fractures and cavities,and thus,avoid mud loss and improve the drilling *** target window,well-azimuth optimization,and the curvature were forecasted to improve the fracturing ***,the Pingqiao anticline,Dongsheng anticline,Jinfo slope,and Wulong syncline were selected as Type I sweet ***,shale gas has been successfully discovered in the basin-margin transition zone and is being commercially developed.

关键词： Normal-pressure shale gas Evaluation of sweet spots Horizontal well design Wufengelongmaxi Southeastern Chongqing

Enrichment mechanism and resource potential of shale-type helium:A case study of Wufeng Formation-Longmaxi Formation in Sichuan Basin

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Science China Earth Sciences 2023年第6期66卷 1279-1288页

作者： Haikuan NIE Quanyou LIU Wei DANG Pei LI Haikun SU Hanyong BAO Liang XIONG Zhujiang LIU Chuanxiang SUN peixian zhang State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development Beijing 102206China Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology Beijing 102206China Petroleum Exploration and Production Research Institute SINOPECBeijing 102206China Institute of Energy Research Peking UniversityBeijing 100871China School of Earth Sciences and Engineering Xi’an Shiyou UniversityXi’an 710065China School of Energy Resources China University of Geosciences(Beijing)Beijing 100083China Research Institute of Exploration and Development Jianghan Oilfield CompanySINOPECWuhan 430223China Research Institute of Exploration and Development Southwest Oil&Gas CompanySINOPECChengdu 610041China Sinopec Exploration Company Chengdu 610041China Research Institute of Exploration and Development East China Petroleum&Gas BranchSINOPECNanjing 210019China

China’s helium resource is highly dependent on overseas ***-rich and U/Th-rich shale reservoirs generally contain helium,and although the helium content is low,the total reserve is ***,the effective development and utilisation of shale-type helium resources is a realistic way to improve the security of helium resources in *** this study,the generation mechanism,helium source and content,migration modes and pathways,controlling factors of enrichment,distribution pattern,and resource potential of the helium were analysed,using the Wufeng-Longmaxi shale in the Sichuan Basin and its ***,countermeasures were proposed for shale-type helium exploration and *** results show that the Wufeng-Longmaxi shale has a high content of U and Th and a good ability to generate *** helium is generated by a typical crustal source of helium and is characterised by self-generation,self-storage,and wide *** helium resource potential is a product of its content and the resources of the associated natural *** continuous supply of helium and effective preservation are the main geological factors that control the enrichment of shale-type *** preliminary evaluation results show that the reserves of helium in proven shale gas reserves are 10.8×10^(8)m^(3)in the Sichuan Basin and its periphery,where the extra-large helium fields are likely to be ***,0.0912×10^(8)m^(3)of helium was produced,along with the annual production of shale *** avoid the waste of helium and to improve the self-supply ability,it is suggested that research on the resource potential,enrichment mechanism,and distribution pattern of shale-type helium should be carried out as soon as possible,and helium extraction techniques for helium-bearing natural gas should be studied.

关键词： Shale Helium content Enrichment mechanism Resource potential Sichuan Basin

陆相咸化湖盆“低TOC”烃源岩高生烃效率探讨——以苏北盆地溱潼凹陷阜宁组二段泥页岩为例

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油气藏评价与开发 2024年第5期14卷 678-687页

作者：高玉巧何希鹏程熊唐玄花彩霞昝灵张培先陈学武庞伊伟中国石化华东油气分公司江苏南京210000 中国地质大学(北京)能源学院北京100083

苏北盆地溱潼凹陷阜宁组二段(以下简称阜二段)页岩油勘探取得重大突破,但其泥页岩总有机碳含量(TOC)普遍不高,一般低于2%。业界认为陆相咸化湖盆“低TOC”烃源岩能生成大量油气,称之为陆相咸化湖盆的“低TOC”高效生烃模式。由于生排烃... 详细信息

苏北盆地溱潼凹陷阜宁组二段(以下简称阜二段)页岩油勘探取得重大突破,但其泥页岩总有机碳含量(TOC)普遍不高,一般低于2%。业界认为陆相咸化湖盆“低TOC”烃源岩能生成大量油气,称之为陆相咸化湖盆的“低TOC”高效生烃模式。由于生排烃效应,烃源岩的TOC会降低,因此,恢复烃源岩原始TOC对客观认识烃源岩的生烃能力、油气资源评价和持续增储上产具有重要意义。以溱潼凹陷典型钻井阜二段泥页岩为研究对象,利用生烃模拟实验和岩石热解资料,采用热模拟TOC演化、有效碳(PC)演化和元素质量守恒法,对QY1井阜二段泥页岩TOC进行了恢复。结果表明:咸化湖盆烃源岩的TOC恢复系数最高可达3~4,且受到岩相的重要影响。随着热演化程度增高,TOC恢复系数增大,纹层状页岩TOC恢复系数高于块状泥岩,QY1井阜二段Ⅳ亚段泥岩、Ⅰ—Ⅲ亚段页岩TOC恢复系数可分别高达1.1~1.5、1.5~3.0。母质类型和生烃活化能的差异导致页岩成烃转化率和TOC恢复系数高于泥岩。

关键词：低有机质丰度烃源岩总有机碳恢复系数阜宁组二段

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