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Tectonic and Hydrocarbon Accumulation Elements Characteristics of the Tethyan Realm in South China

Acta Geologica Sinica(English Edition) 2009年第6期83卷 1214-1223页

作者： YU Yixin TANG Liangjie YIN Jinyin DONG Li wang pengwan ZHOU Yan State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing 102249 China Basin and Reservoir Research Center China University of Petroleum Beijing 102249 China Institute of Petroleum Exploration and Development SINOPEC Beijing 100083 China Hangzhou Research Institute of Petroleum Geology PetroChina Hangzhou Zhejiang 310023 China

The evolution of the global Tethys Sea can be classified into three stages, Proto-Tethys, Paleo-Tethys and Neo-Tethys. The Tethyan realm has distinctive features of zonations and segmentations along north-south and east-west, respectively, and has variable richness in oil and gas. The petroleum geological conditions of Tethys are complicated, partly represented by multi-layer of source and seal rocks, and reservoirs. The hydrocarbon accumulation elements and periods of the Tethyan realm show gradually younger from west to east and north to south. South China is located in the north belt and Yangtze segment of the Tethyan realm, and its polycyclic tectonic movements were governed by the Tethyan and Pacific realms. The blocks in South China rotated clockwise and counter-clockwise during their drift northward from Gondwana. The belts and segmentations of Tethys in South China are also clear, with six tectonic belts including： Chuxiong-Sichuan; middle Guizhou-Hunan-Hubei; lower Yangtze; Xuefeng-Jiangnan; Guangxi-Hunan-Jiangxi; and Cathaysia. Numerous faults, including compressional, compressional-shear, extensional, extensional-shear and shear are well developed in South China. The fault strikes are mainly NE, NW and NS, in which the NE is the dominant direction. Lower, middle and upper hydrocarbon assemblages, respectively corresponding to Proto-, Paleo- and Neo-Tethys, formed in the Tethyan realm of South China with the lower and middle having excellent hydrocarbon accumulation conditions. An integrated analysis of tectonic evolution, superimposed deformation and later hydrocarbon preservation shows that during the Neo-Tethyan stage in South China, continental sediments were deposited and experienced intense tectonic deformation, which had resulted in different hydrocarbon pool-forming features from those of the Neo-Tethyan realm.

关键词： Tethys tectonic evolution hydrocarbon accumulation elements hydrocarbon assemblages South China

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Relationship Between Electrical Properties and Sedimentary Environment of the Longmaxi Formation Shale,Southern Sichuan

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Acta Geologica Sinica(English Edition) 2020年第5期94卷 1531-1546页

作者： YANG Kai ZHANG Bing wang Xuben HE Lanfang YANG Hongyu wang pengwan TANG Jialin DENG Jixin ZHANG Cong Earth Exploration and Information Technology Key Laboratory of Ministry of Education Chengdu University of TechnologyChengdu 610059China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China PetroChina Hangzhou Institute of Petroleum Geology Hangzhou 310023China China Geological Survey the Key Laboratory of Unconventional Petroleum GeologyBeijing 100083China

The Lower Silurian Longmaxi Formation in the south of Sichuan is a key player in the exploration and development of shale gas in *** to a highly complex topographic area,electromagnetic methods(EM)become important exploration means in this *** studies have been conducted on the shale mineral composition and electrical properties of shale,however,the correlation between sedimentary environments and the electrical properties of shale remain poorly *** electrical properties and sedimentary environment of the organic-rich shale of the Longmaxi Formation have been studied by means of X-ray diffraction,organic geochemistry,scanning electron microscopy and complex resistivity *** discovered high quartz content of the Longmaxi Formation shale results in low ***-water shelf biogenic quartz contributes lower resistivity more than that of shallow-water terrigenous *** deep-water anoxic and organic sedimentary environment led to major enrichment of pyrite,leading to a high polarization effect in *** present the correlation between the lithofacies types and electrical properties of Longmaxi *** mixed siliceous shale lithofacies is the most favorable among the three lithofacies,which is characterized by high total organic carbon(TOC)content,high brittleness mineral content,high polarization and low resistivity("three high and one low").This feature is an effective identification of shale gas reservoirs by electromagnetic *** study can provide constraints on electrical parameters of rocks for electromagnetic"sweet spot"exploration of shale gas,and so this has important geological significance to shale gas exploration and development.

关键词： shale gas exploration quartz total organic carbon lithofacies electromagnetic method Sichuan basin

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Formation behaviors of rod-like reactive shaped charge penetrator and their effects on damage capability

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Defence Technology（防务技术） 2024年第2期32卷 242-253页

作者： Tao Sun Haifu wang Shipeng wang Chao Ge Die Hu pengwan Chen Yuanfeng Zheng Beijing Institute of Technology State Key Laboratory of Explosion Science and TechnologyBeijing100081China Xi'an Institute of Electromechanical Information Technology Xi'an710065China

Formation behaviors of rod-like reactive shaped charge penetrator(RRSCP)and their effects on damage capability are investigated by experiments and numerical *** pulsed X-ray technology and a spaced aluminum/steel plate with the thicknesses of 5 mm/100 mm are *** types of sphericalsegment aluminum-polytetrafluoroethylene-copper(Al-PTFE-Cu)reactive liners with Cu contents of 0%,46.6%,and 66%are fabricated and *** experimental results show that the reactive liners can form excellent rod-shaped penetrators with tail skirts under the shaped charge effect,but the tail skirts disappear over ***,rupturing damage to the aluminum plate and penetration to the steel plate are caused by the RRSCP *** simulation analysis,the RRSCP is formed by a mechanically and chemically coupled response with the reactive liner activated by shock in its outer walls and bottom and then backward overturning,forming a leading reactive penetrator and a following chemical energy *** unique formation structure determines the damage modes of the aluminum plate and the steel *** analysis indicates that the formation behaviors and damage capability of Al-PTFE-Cu RRSCP strongly depend on Cu *** increasing Cu content,the velocity,activation extent,and reaction extent of Al-PTFE-Cu RRSCP decrease,which contribute to elongation and alleviate the negative effects of chemical reactions on elongation,significantly increasing the length-diameter ratio and thus enhancing the capability of steel plate ***,the lower activation extent and energetic density will weaken the RRSCP's capability of causing rupturing damage to the aluminum plate.

关键词： Reactive materials Al-PTFE composites Reactive liner X-ray Penetration

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Enhanced structural damage behavior of liquid-filled tank by reactive material projectile impact

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Defence Technology（防务技术） 2024年第1期31卷 211-229页

作者： Jianwen Xie Yuanfeng Zheng Zhenyang Liu Chengzhe Liu Aoxin Liu pengwan Chen Haifu wang State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

A series of ballistic experiments were performed to investigate the damage behavior of high velocity reactive material projectiles(RMPs) impacting liquid-filled tanks,and the corresponding hydrodynamic ram(HRAM) was studied in ***/Al/W RMPs with steel-like and aluminum-like densities were prepared by a pressing/sintering *** projectiles impacted a liquid-filled steel tank with front aluminum panel at approximately 1250 m/*** corresponding cavity evolution characteristics and HRAM pressure were recorded by high-speed camera and pressure acquisition system,and further compared to those of steel and aluminum *** different from the conical cavity formed by the inert metal projectile,the cavity formed by the RMP appeared as an ellipsoid with a conical *** RMPs were demonstrated to enhance the radial growth velocity of cavity,the global HRAM pressure amplitude and the front panel damage,indicating the enhanced HRAM and structural damage ***,combining the impact-induced fragmentation and deflagration characteristics,the cavity evolution of RMPs under the combined effect of kinetic energy impact and chemical energy release was *** mechanism of enhanced HRAM pressure induced by the RMPs was further revealed based on the theoretical model of the initial impact wave and the impulse ***,the linear correlation between the deformation-thickness ratio and the non-dimensional impulse for the front panel was obtained and *** was determined that the enhanced near-field impulse induced by the RMPs was the dominant reason for the enhanced structural damage behavior.

关键词： Reactive material projectile Hydrodynamic ram Enhanced structural damage Liquid-filled tank Impact

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碳酸盐岩致密气成藏地质条件分析——以四川盆地大安区块茅一段为例

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断块油气田 2024年第2期31卷 216-224页

作者：栗维民马立桥何方雨王鹏万计玉冰徐云俊徐政语曹全斌贾丹中国石油浙江油田分公司浙江杭州310023 中国石油杭州地质研究院浙江杭州310023 中国石油天然气集团有限公司碳酸盐岩储集层重点实验室浙江杭州310023

四川盆地大安区块大安2、大安1、大坝1井相继在茅一段石灰岩中获得天然气发现,由于勘探程度低,对天然气成藏地质条件认识不清。文中以该区茅一段为例,综合野外地质调查、单井分析,以及有机碳分析、薄片鉴定、X射线衍射、场发射扫描电镜... 详细信息

四川盆地大安区块大安2、大安1、大坝1井相继在茅一段石灰岩中获得天然气发现,由于勘探程度低,对天然气成藏地质条件认识不清。文中以该区茅一段为例,综合野外地质调查、单井分析,以及有机碳分析、薄片鉴定、X射线衍射、场发射扫描电镜等测试成果,开展烃源岩岩性、地球化学特征、储层沉积相、矿物组分、微观孔隙特征及含气系统研究,分析致密气成藏地质条件,建立成藏模式。研究结果表明:茅一段眼球、眼皮灰岩沉积受控于中缓坡沉积环境,构成了自生自储的物质基础;眼皮灰岩是一套有效烃源岩,提供充足的烃源供给;眼球、眼皮灰岩为低孔低渗致密储层,互层状叠置,纳米孔、微米孔发育,微裂缝贯通穿插,有利于大面积成藏;成藏模式为致密气源储一体、源内聚集、就近吸附,天然气动态生成,动态聚集,不易逸散;该区在燕山中晚期成藏,喜马拉雅期保存,中缓坡的眼皮灰岩带具有高脆性、中高TOC、中含气性特点,是致密气有利勘探方向。

关键词：致密气碳酸盐岩成藏茅一段大安区块四川盆地

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Theoretical analysis of the elastic Kelvin-Helmholtz instability in explosive weldings

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Defence Technology（防务技术） 2024年第2期32卷 521-528页

作者： Yuanbo Sun Jianning Gou Cheng wang Qiang Zhou Rui Liu pengwan Chen Tonghui Yang Xiang Zhao State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China Beijing HIWING Scientific and Technological Information Institute Beijing100084China School of Aerospace Engineering Tsinghua UniversityBeijing100084China

By considering the joint effects of the Kelvin-Helmholtz(KH) and Rayleigh-Taylor(RT) instabilities, this paper presents an interpretation of the wavy patterns that occur in explosive welding. It is assumed that the elasticity of the material at the interface effectively determines the wavelength, because explosive welding is basically a solid-state welding process. To this end, an analytical model of elastic hydrodynamic instabilities is proposed, and the most unstable mode is selected in the solid phase. Similar approaches have been widely used to study the interfacial behavior of solid metals in high-energy-density physics. By comparing the experimental and theoretical results, it is concluded that thermal softening,which significantly reduces the shear modulus, is necessary and sufficient for successful welding. The thermal softening is verified by theoretical analysis of the increase in temperature due to the impacting and sliding of the flyer and base plates, and some experimental observations are qualitatively *** summary, the combined effect of the KH and RT instabilities in solids determines the wavy morphology, and our theoretical results are in good qualitative agreement with experimental and numerical observations.

关键词： Explosive welding Hydrodynamic instabilities Elasticity

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桂中坳陷泥盆系烃源岩发育环境及潜力评价

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石油学报 2011年第2期32卷 273-279页

作者：贺训云姚根顺贺晓苏陈子炓王鹏万中国科学院地质与地球物理研究所北京100029 中国科学院研究生院北京100049 中国石油杭州地质研究院浙江杭州310023 中国石油天然气集团公司碳酸盐岩储层重点实验室浙江杭州310023

为查明桂中坳陷油气生成物质基础及资源潜力,通过开展区域沉积相研究与典型剖面、钻井资料的系统分析,对桂中坳陷泥盆系海相优质烃源岩发育环境、时空展布及地球化学特征进行了研究。结果表明:桂中坳陷中-下泥盆统发育海相优质泥质烃源... 详细信息

为查明桂中坳陷油气生成物质基础及资源潜力,通过开展区域沉积相研究与典型剖面、钻井资料的系统分析,对桂中坳陷泥盆系海相优质烃源岩发育环境、时空展布及地球化学特征进行了研究。结果表明:桂中坳陷中-下泥盆统发育海相优质泥质烃源岩,主要分布在南丹—河池—宜州以南早期台盆相沉积中,优质烃源岩一般厚为40～200m;烃源岩有机质丰度高,大多数样品TOC值大于2.0%,最高可达4.7%,原始生烃潜量大多大于6.0mg/g;烃源岩干酪根显微组分主要为腐泥组,相对含量为38.7%～89.7%,干酪根碳同位素值为-27.80‰～-24.84‰,结合饱和烃色谱特征分析,表明其有机质类型主要为Ⅱ型;烃源岩热演化程度较高,总体处于高—过成熟阶段。桂中坳陷早、中泥盆世台盆相环境发育有机质含量高的海相优质烃源岩,可为桂中坳陷油气生成及聚集提供雄厚的成烃物质基础。

关键词：桂中坳陷海相优质烃源岩发育环境地球化学特征烃源岩评价

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中、上扬子龙马溪组层序划分及对页岩储层发育的控制

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地质学报 2020年第11期94卷 3471-3487页

作者：熊绍云王鹏万黄羚邹辰贺训云李昌徐政语中国石油杭州地质研究院杭州310023 中国石油浙江油田分公司杭州310023

以详细的岩相研究为基础,利用岩相的垂向叠置关系,结合测井、有机地球化学、沉积特征、矿物学特征、元素地球化学等分析,将中、上扬子下志留统龙马溪组划分为2个具有完整海侵和海退的三级层序,即SQ1~SQ2,平均延时约为2.5Ma。龙马溪组页... 详细信息

以详细的岩相研究为基础,利用岩相的垂向叠置关系,结合测井、有机地球化学、沉积特征、矿物学特征、元素地球化学等分析,将中、上扬子下志留统龙马溪组划分为2个具有完整海侵和海退的三级层序,即SQ1~SQ2,平均延时约为2.5Ma。龙马溪组页岩储层主要发育7种成因类型的微米—纳米级微观储集空间,裂缝储集空间为构造剪裂缝和页理缝2类。通过不同孔径孔隙体积与有机碳含量的关系以及页岩对甲烷吸附能力分析,页岩储层孔隙发育主要受有机碳含量控制。富有机质页岩发育受控于有机质生产力、有机质聚集及有机质保存,最大海泛面附近的δ^13Corg介于-31‰^-30‰之间,高活性铁含量介于1.0%~1.56%之间,δ^13Corg负漂移及高活性铁含量最大,指示了最高的古生产力;沉积速率在最大海泛面附近约为7.5m/Ma,较低的沉积速率有利于有机碳聚集,其有机碳含量高达2%~6%;最大海泛面附近Th/U比值一般为0.24~0.54,V/Cr比值为5.26~8.27,表现出强缺氧还原环境,有利于有机质保存。因此,最大海泛面附近为富有机质页岩发育段,是寻找页岩气有利层段。

关键词：中、上扬子龙马溪组层序划分页岩储层控制作用

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鄂西地区奥陶纪—志留纪之交海盆水体滞留程度与页岩有机质富集的关系

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石油学报 2023年第10期44卷 1599-1611页

作者：沈均均王玉满李辉计玉冰邱振王鹏万孟江辉长江大学非常规油气省部共建协同创新中心湖北武汉430100 中国石油勘探开发研究院北京100083 中海油田服务股份有限公司油田生产事业部天津300459 中国石油浙江油田公司勘探开发一体化中心浙江杭州310023 中国石油杭州地质研究院浙江杭州310023

奥陶纪—志留纪之交的水体滞留程度是否对有机质富集产生影响目前还存在一定的争议。在生物地层格架划分的基础上,分析了鄂西地区不同时期页岩沉积学及地球化学特征,探讨了水体滞留程度与有机质富集的关系。研究结果表明:鄂西地区奥陶... 详细信息

奥陶纪—志留纪之交的水体滞留程度是否对有机质富集产生影响目前还存在一定的争议。在生物地层格架划分的基础上,分析了鄂西地区不同时期页岩沉积学及地球化学特征,探讨了水体滞留程度与有机质富集的关系。研究结果表明:鄂西地区奥陶纪—志留纪之交由早至晚可划分出冰期前(WF2-WF3笔石带)、冰期(WF4笔石带—观音桥段)和冰期后(LM1—LM5笔石带)3个时期,均处于较深的水体环境中。水体滞留程度对有机质保存条件无明显影响,主要控制海洋生产力,进而影响有机质富集:冰期前WF2笔石带沉积期处于台-棚转换期,海平面相对较低,同时周缘古陆和局部水下古隆起剧烈隆升,水体滞留程度最强(强滞留),与外海营养物质交换能力最弱,导致古生产力水平最低,TOC含量最低(平均为2.9%)。进入WF3笔石带沉积期后,海平面持续上升进入高位,水体滞留程度明显减弱(中等滞留),古生产力水平升高,TOC含量随之升高(平均为3.6%);冰期海平面虽然处于最低位,但上升洋流异常活跃,水体滞留程度最弱,营养物质随上升洋流大量涌入扬子海盆,导致古生产力水平达到最高,TOC含量最高(平均为4.6%);冰期后,气候回暖,冈瓦纳冰川快速消融,构造活动稳定,海平面大幅上升进入高位,水体滞留程度中等,古生产力水平较高,TOC含量较高(平均为4.0%)。

关键词：中扬子黑色页岩五峰组—龙马溪组水体滞留程度有机质富集

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昭通示范区太阳浅层页岩气田的勘探发现与评价探明创新实践认识

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海相油气地质 2022年第2期27卷 113-123页

作者：梁兴王鹏万罗瑀峰李兆丰袁晓俊中国石油浙江油田公司中国石油杭州地质研究院

基于昭通示范区太阳浅层页岩气田勘探发现与评价的创新实践,系统总结了强改造复杂构造区的山地浅层页岩气田的基本地质特征和富集规律。太阳浅层页岩气田五峰组—龙马溪组龙一1亚段发育优质页岩,有机碳含量高,生烃潜力好。页岩储集条件... 详细信息

基于昭通示范区太阳浅层页岩气田勘探发现与评价的创新实践,系统总结了强改造复杂构造区的山地浅层页岩气田的基本地质特征和富集规律。太阳浅层页岩气田五峰组—龙马溪组龙一1亚段发育优质页岩,有机碳含量高,生烃潜力好。页岩储集条件优越,有机质纳米孔隙、脆性矿物粒间粒内孔隙与黏土矿物层间缝为页岩气提供大量储集空间。构造改造强度总体较弱,三维封存箱体系完整,整体保存条件良好,含气量较高,具有常压至微超压气藏系统。页岩脆性矿物含量高,背斜构造区水平应力差小,易于体积压裂改造。气田具有龙一11—龙一12下部和龙一13小层双靶体,可实施小井距立体错层体积开发。页岩气成藏赋存地质理论的创新认识与一体化地质工程技术的进步,是太阳浅层页岩气田勘探突破与高效评价的关键。太阳浅层页岩气田勘探的成功经验,对于中国南方复杂构造区浅层页岩气勘探具有重要的借鉴示范和指导意义。

关键词：浅层页岩气三维封存箱体系立体错层体积开发五峰组龙马溪组一段1亚段太阳气田昭通示范区

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