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1.
海拉尔盆地苏德尔特构造带基底裂缝特征及控制因素 总被引：1，自引：0，他引：1
裂缝是海拉尔盆地苏德尔特构造带基底的主要储集空间,其发育规律控制着苏德尔特构造带的油气分布。根据岩芯、测井等资料并结合盆地及其周缘露头观察,对海拉尔盆地火山岩基底储层裂缝特征和控制因素进行研究。结果表明海拉尔盆地苏德尔特构造带基底储层裂缝包括非构造缝(风化缝、溶蚀缝)和构造缝,其中以构造缝为主。裂缝长度变化较大,主要缝宽在0.1~3.0 mm,既有低角度缝也有高角度缝,有效裂缝倾角多为25°~80°。裂缝走向以北东向、近东—西向为主,其次为北西—南东向。裂缝的发育程度主要受基底岩性、剥蚀淋滤作用和构造作用控制,构造作用对全区裂缝的形成和改造具有重要意义。基底裂缝储层分段发育,各段储层裂缝主控因素不同,风化作用主要影响浅层裂缝发育;淋滤作用影响中层裂缝发育;构造作用控制深层裂缝发育。深层致密带储层是苏德尔特构造带深层油气藏勘探的重点目标区,主要发育在盆地基底深大断裂附近或是基底内幕构造应力转化带。研究对于海拉尔盆地基底内幕的油气勘探具有指导借鉴意义。 相似文献
2.
《现代地质》2017,(5)
火山岩风化壳储层已成为重要的油气勘探新领域,开展风化壳储层特征及分布规律研究对火山岩油气勘探具有重要的理论和现实指导意义。利用钻井、岩心、测井、地震、分析化验等资料,从火山岩形成环境着手,对准噶尔盆地西北缘中拐凸起石炭系火山岩风化壳储层特征及控制因素开展综合研究,明确火山岩风化壳油气成藏模式及分布规律。研究表明:中拐凸起石炭系火山岩形成于岛弧环境,岩性以安山岩、凝灰岩为主;火山岩风化壳结构分为风化黏土层、强风化带、弱风化带及致密未风化带4层结构,其中强风化带储层物性最好,为主要的储层发育区;有效储集空间主要为次生孔隙和裂缝,裂缝对储层渗流能力有较好的改造作用;风化壳储层主要受风化淋滤作用、岩性岩相、构造位置及断裂(裂缝)等因素的控制;油气主要分布在距风化壳顶面480 m范围内,具有沿三带(靠近断裂带、构造高部位地带、有利岩相发育带)、一面(不整合面附近)分布的富集规律。 相似文献
3.
断裂系统对碳酸盐岩油气聚集的控制作用:以塔北隆起轮古东油气田为例 总被引：1，自引：0，他引：1
综合利用岩心、测井、试油及薄片等资料分析了轮古东奥陶系断裂对储层的改造作用,探讨了断裂与奥陶系碳酸盐岩油气富集程度的关系。研究表明,轮古东奥陶系碳酸盐岩基质孔隙不发育,孔洞缝及其组合为主要储集空间,断裂及伴生裂缝有效地改造了碳酸盐岩储集层,断裂发育形成的裂缝及断裂破碎带控制和促进了岩溶作用的发生,在断裂附近碳酸盐岩孔洞更发育,断裂带附近2 km内易形成高渗透带,高角度裂缝对碳酸盐岩孔洞的形成更为有效。EW向和SN向断裂是油气垂向运移的有效通道,控制着平面上和垂向上气油比、天然气产能及相态的变化。断裂控制着碳酸盐岩孔洞、洞穴、裂缝空间组合分布的多样性和差异性及油气富集的非均质性,断裂带附近高角度裂缝及孔洞较发育,油气产能较高,在远离断裂部位油气的聚集效率低,持续活动的走滑断层附近是油气最为富集的区域,因此,轮古东奥陶系具有纵向上多层系含油气、平面上分区分带的特征。 相似文献
4.
塔里木盆地台盆区深层海相油气勘探目标由层间岩溶向断控岩溶转变,并在处于坳陷区的富满地区发现了以走滑断裂为主控因素的断控型油田。富满地区储层特征与盆地内古隆起区、斜坡区均有不同,因此需要建立适合研究区的走滑断裂控储模式。本次研究通过高密度三维地震资料刻画了研究区走滑断裂的分布,利用岩心、测井、试井资料以及缝洞体识别技术明确了不同类型的储层分布,分析了研究区走滑断裂样式与差异变形对储层发育的影响,建立了走滑断裂控储模式。研究结果表明:(1)富满大型碳酸盐岩油气聚集区储集空间主要由多期走滑构造破裂作用与岩溶作用形成的洞穴型、裂缝-孔洞型、裂缝型与孔洞型空间组成;(2)走滑断裂活动性越强,断裂带宽度越大,储层发育规模越大,张扭段与压扭段断层破碎带型储层较平移段平面分布范围更广,纵向发育深度更大;(3)张扭段为汇水区,断裂联通性好,有利于大气流体下渗以及热流体上涌从而对储层进行溶蚀改造;压扭段为分流区,岩溶储层多发育于断裂带两侧,断裂开启程度低,受流体改造程度低于张扭段。 相似文献
5.
以广泛收集的数据资料为依据,运用含油气盆地理论方法,总结南苏门达腊盆地构造沉积演化和油气地质特征,探讨油气分布规律,分析其勘探潜力。结果显示,南苏门达腊盆地是新生代弧后裂谷盆地,经历了裂前、裂谷、过渡、坳陷和反转等5个演化阶段。主力烃源岩为过渡期沉积的炭质页岩和煤层,储集层主要为上渐新统砂岩、下中新统灰岩和裂缝基底。油气总体呈现"深层气、中层油和气、浅层油"的分布特征,主要富集于构造及构造复合相关圈闭中。断裂、储层发育有利相带和凹中隆是控制油气分布的主要因素。盆地油气成藏条件良好,具有较好的勘探潜力。生烃灶周边断裂发育的斜坡、古隆起是有利的勘探区,凹陷内的岩性、地层圈闭也是有利的勘探目标,应加大对此类圈闭的研究和勘探力度。 相似文献
6.
以岩芯裂缝和薄片资料为基础,结合成像测井技术和地震资料研究王府断陷火石岭组火山岩储层裂缝特征及分布规律。该区火山岩储层发育原生裂缝和构造-后生裂缝,原生裂缝张开度小,对改善储层意义不大;而构造-后生裂缝张开度大,延伸较远,能提高储层的储渗能力。通过FMI成像测井可识别出高导缝、高阻缝、微裂缝和钻井诱导缝,其中高导缝和微裂缝一般为有效裂缝。根据高导缝走向和构造特征,将研究区火山岩储层裂缝分为3个区:北部区、中部区和南部区,其中北部区和南部区受顺直断裂控制,高导缝具有两个优势走向;中部区受交叉断裂控制,高导缝为一个优势走向。中部区裂缝平均密度最高,倾角属性也显示为有利裂缝区,可以作为勘探和井位部署的重点区域。 相似文献
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构造裂缝发育程度是碳酸盐岩地区构造裂缝定量研究的重要方面,对碳酸盐岩裂缝油气藏的储层预测具有重要意义。论文基于野外地质实际考察,研究岩性、地层厚度、构造性质等因素对构造裂缝的影响,建立比较系统的构造裂缝发育分布规律,建立构造裂缝发育的地质模型。白云岩的裂缝密度明显大于灰岩类的裂缝密度。地层越厚裂缝密度越小,但裂缝规模较大。走滑断裂控制的构造裂缝的裂缝密度与距断裂的距离呈指数关系且存在"断裂控制的裂缝带","断裂控制裂缝带"与断裂的性质、规模和断距等因素密切相关。提出不同性质断裂"断裂控制裂缝带"宽度与断层破碎带宽度的比值K,这个比值的发现对断裂控制的裂缝油气勘探开发具有重要的应用价值。 相似文献
8.
油气盆地低渗透储层裂缝预测研究现状及进展 总被引：14，自引：2，他引：12
我国拥有相当数量裂缝型低渗储层的地质储量,在我国油气生产中起举足轻重的作用。系统开展低渗储层中裂缝特征和分布规律研究预测,无疑对我国的低渗透储层油气勘探开发具有指导作用。目前,国内外在油气盆地低渗透储层中对裂缝预测及评价已经形成了很多富有特色的方法,但是由于裂缝成因的复杂性、发育的多阶段性,对低渗储层裂缝的预测及评价研究还处于探索阶段。本文较为系统地综述了油气盆地低渗透储层裂缝预测研究现状与进展、不同成因的裂缝预测方法、裂缝研究存在问题和解决方法。 相似文献
9.
阿姆河盆地东北部油气资源丰富,基底断裂发育,在盐膏岩影响下断裂成因复杂。根据最新采集的地震资料、岩心和岩屑样品,通过地震构造解释、平衡剖面、储层流体包裹体均一温度测定等方法,研究了查尔朱基底断裂演化及其对盐下油气运聚的控制作用。结果表明,查尔朱断裂为基底同沉积断裂,控制二叠系—三叠系和侏罗系沉积,查尔朱基底断裂表现为西段走滑、中段正断裂、东段反转的特征,是在二叠系—三叠系伸展和新近系挤压两种近乎垂直的应力体制下形成的,同时受巨厚盐膏岩滑脱层的影响,伸展期正断裂在挤压构造运动中重新活化,走向与挤压应力方向一致的基底断裂走滑,走向与挤压应力方向垂直的基底断裂反转,断裂控藏作用表现在:早期正断裂控制了烃源岩发育,断裂晚期活化为油气垂向运移通道,形成了盐下"阶梯状"运移系统,晚期反转断裂为油气聚集提供了圈闭条件。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
12.
The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
13.
Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level 相似文献
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正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7), 相似文献
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正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci- 相似文献
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正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli- 相似文献
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正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.) 相似文献
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正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861 相似文献