影响水力压裂效果的因素及人工神经网络评价   总被引：2，自引：2，他引：0  

孙东生  王红才  侯默  赵卫华  宋清新  刘振华  牛淑芳 《地质力学学报》2006,12(4):485-491

水力压裂是低渗透油气田提高开采效益的主要技术手段之一,但是影响水力压裂效果的因素较多,如地质特征、储层物性和地层能量等。为了达到理想的压裂效果,就要综合考虑各个影响因素之间的相互关系,找出影响压裂效果的主要因素。本文利用人工神经网络方法建立了数学评估模型并对已有的大量生产数据进行了网络训练和方法验证。结果证明所建立的压裂井潜能评估模型稳定性好,预测精度较高,对油田水力压裂的选井评层及产能预测具有一定的指导意义。   相似文献   

Petroleum Geology in Deepwater Settings in a Passive Continental Margin of a Marginal Sea: A Case Study from the South China Sea     

ZHANG Gongcheng  FENG Congjun  YAO Xingzong  JI Mo  YANG Haizhang  QU Hongjun  ZENG Qingbo  ZHAO Zhao  SUN Rui 《《地质学报》英文版》2021,95(1):1-20

Deepwater oil and gas exploration has become a global hotspot in recent years and the study of the deep waters of marginal seas is an important frontier research area.The South China Sea(SCS)is a typical marginal sea that includes Paleo SCS and New SCS tectonic cycles.The latter includes continental marginal rifting,intercontinental oceanic expansion and oceanic shrinking,which controlled the evolution of basins,and the generation,migration and accumulation of hydrocarbons in the deepwater basins on the continental margin of the northern SCS.In the Paleogene,the basins rifted along the margin of the continent and were filled mainly with sediments in marine-continental transitional environments.In the Neogene–Quaternary,due to thermal subsidence,neritic-abyssal facies sediments from the passive continental margin of the SCS mainly filled the basins.The source rocks include mainly Oligocene coal-bearing deltaic and marine mudstones,which were heated by multiple events with high geothermal temperature and terrestrial heat flow,resulting in the generation of gas and oil.The faults,diapirs and sandstones controlled the migration of hydrocarbons that accumulated principally in a large canyon channel,a continental deepwater fan,and a shelf-margin delta.  相似文献   

The Liaonan Metamorphic Core Complex： Constitution, Structure and Evolution   总被引：3，自引：0，他引：3  

LIU Junlai  GUAN Huimei  JI Mo  CAO Shuyun  HU Ling State Key Laboratory of Geological Processes  Mineral Resources  and Key Laboratory of Lithosphere Tectonics  Lithoprobing Technology of the Ministry of Education  China University of Geosciences  Bei 《《地质学报》英文版》2006,80(4):502-513

The Liaonan metamorphic core complex (mcc) has a three-layer structure and is constituted by five parts, i.e. a detachment fault zone, an allochthonous upper plate and an supradetachment basin above the fault zone, and highly metamorphosed rocks and intrusive rocks in the lower plate. The allochthonous upper plate is mainly of Neoproterozoic and Paleozoic rocks weakly deformed and metamorphosed in pre-Indosinan stage. Above these rocks is a small-scale supradetachment basin of Cretaceous sedimentary and volcanic rocks. The lower plate is dominated by Archean TTG gneisses with minor amount of supracrustal rocks. The Archean rocks are intruded by late Mesozoic synkinematic monzogranitic and granitic plutons. Different types of fault rocks, providing clues to the evolution of the detachment fault zone, are well-preserved in the fault zone, e.g. mylonitic gneiss, mylonites, brecciated mylonites, microbreccias and pseudotachylites. Lineations in lower plate granitic intrusions have consistent orientation that indicate uniform top-to-NW shearing along the main detachment fault zone. This also provides evidence for the synkinematic characteristics of the granitic plutons in the lower plate. Structural analysis of the different parts in the mcc and isotopic dating of plutonic rocks from the lower plate and mylonitic rocks from detachment fault zone suggest that exhumation of the mcc started with regional crustal extension due to crustal block rotation and tangential shearing. The extension triggered magma formation, upwelling and emplacement. This event ended with appearance of pseudotachylite and fault gauges formed at the uppermost crustal level. U-Pb dating of single zircon grains from granitic rocks in the lower plate gives an age of 130±5 Ma, and biotite grains from the mam detachment fault zone have 40Ar-39Ar ages of 108-119 Ma. Several aspects may provide constraints for the exhumation of the Liaonan mcc. These include regional extensional setting, cover/basement contact, temporal and spatial coupling of extension and magmatism, basin development and evolution of fault tectonites along detachment fault zone. We propose that the exhumation of the Liaonan mcc resulted from regional extension and thinning of crust or lithosphere in eastern North China, and accompanied with synkinematic intrusion of granitic plutons, formation of detachment fault zone, uplifting and exhumation of lower-plate rocks, and appearance of supradetachment basin.  相似文献   

交通地理网络分析模型的实现     

靳军  王沫  王东 《海洋测绘》2006,26(6):28-30,61

首先介绍了网络分析的概念,接着介绍了交通网络的基本要素,然后建立了交通网络的模型,通过确定影响交通体系中网络流的因素,实现了最优路径的选择,最后用具体的数据验证了模型的合理性。  相似文献   

Diagenesis of the Chang 9 oil-bearing interval of Triassic Yanchang Formation in Zhengning area,Ordos Basin          下载免费PDF全文

Shen Mo  Zhu Xiao-Min  Li Cheng-Shan  Zhang Wen-Xuan  Cheng Yi-Fan  Jiang Meng-Ya 《古地理学报》1999,22(3):539-554

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中国东部燕山期岩石圈-软流圈系统大灾变与成矿环境   总被引：84，自引：9，他引：75  

邓晋福  莫宣学  赵海玲  罗照华  赵国春  戴圣潜 《矿床地质》1999,18(4)

中国东部在燕山期发生了岩石圈＿软流圈系统（ＬＡＳ） 大灾变事件, 并识别出被扰动的ＬＡＳ的两种类型, 即在挤压造山环境下的岩石圈巨大减薄与巨大增厚作用; 它们分别对应相关的安第斯型和海西型成矿作用。大量的新生、热地幔物质和再活化的热的下地壳物质取代、加热和注入冷的岩石圈和地壳是燕山期成矿大爆发的基因和基本的深部环境。再活化和活动的岩石圈尺度的不连续带是成矿带的良好储矿空间。巨大的岩浆＿流体＿成矿系统是形成巨大矿集区的必需。从深部成矿环境来看, 中国东部具有巨大的找矿潜力  相似文献   

极性矿物对纳米金的吸附实验   总被引：2，自引：1，他引：1  

姜泽春  莫德明  陈大梅 《矿物学报》1999,19(3):358-361

纳米金通常带有负电荷,遇带正电荷的矿物,它将被吸附而沉淀。黄铁矿、黄铜矿、闪锌矿和α－石英是金矿中常见矿物,是载金矿物,也是极性矿物（半导体矿物,热电矿物）。实验结果表明,在动态温度条件下矿物表面有正负电荷,因此同种矿物能够相互吸附,纳米金被带正电荷的矿物吸附。  相似文献   

青海省东昆仑地区晚古生代—早中生代火山活动与区域构造演化   总被引：43，自引：1，他引：42  

罗照华  邓晋福 《现代地质》1999,13(1):51-56

从沉积建造分析入手,通过对区内晚古生代—早中生代火山岩组合的构造属性识别,认为区内晚古生代—早中生代构造演化是一个连续的过程,它奠定了该区的基本构造格局,也是金与铜多金属矿产的主要成矿时期;晚古生代—早中生代发育的双岩浆弧是在同一动力学机制下不同阶段形成的造山岩浆弧：陆缘的钙碱性岩浆弧和陆内的高钾钙碱性岩浆弧。晚古生代—早中生代构造岩浆旋回可以划分为２个阶段,早期的俯冲造山阶段形成了与蛇绿岩有关的火山岩类和弧火成岩类,晚期的大洋闭合和碰撞造山阶段则形成了钾玄岩系列火山岩。  相似文献   

Geological Characteristics and Genesis of Wulonggou Gold Deposit and Evaluation of Gold Metallogenic Potential in East Kunlun     

Mo Xuanzhi  Yuan Wanmen 《中国地质大学学报(英文版)》1999,10(1):62-66

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Response of channel dynamics to recent meander neck cut-off in a lowland meandering river with artificial training history: the Morava River,Czech Republic     

Jakub Ondruch  Zdeněk Máčka  Monika Šulc Michalková  René Putiška  Martin Knot  Petr Holík 《水文科学杂志》2018,63(8):1236-1254

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