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The up-conversion of Er3+/Yb3+co-doped transparent glass-ceramics 50SiO2-10AlF3-5TiO2-30BaF2-4LaF3-0.5ErF3-0.5YbF3 containing Ba2 LaF7 nanocrystals under the changing of heat treatment temperature and time were investigated.The Ba2 LaF7 nanocrystals precipitated from the glass matrix was confirmed by X-ray diffraction(XRD).The structural investigation carried out by XRD and transmission electron microscopy(TEM) evidenced the formation of cubic Ba2 LaF7 nanocrystals with crystal size of about 14 nm.Comparing with the samples before heat treatment,the high efficiency up-conversion emission of Er3+/Yb3+co-doped samples was observed in the glass-ceramics under 980 nm laser diode excitation.The increase in red emission intensity bands was stronger than the green bands when the crystal size increased.The mechanism for the up-conversion process in the glass-ceramics and the reasons for the increase of Er3+/Yb3+co-doped up-conversion intensity after heat treatment were discussed. 相似文献
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针对S#地区处于多条控边断层的交汇处,断层发育、含油层系多、储层横向变化大、油水关系较为复杂等特点,采用构造精细解释、相干数据体分析、测井相分析、地震属性分析、地震频语分析、正演模型分析、储层特征重构、波阻抗地震反演等储层综合预测技术,初步查清了区块内地层的构造特征、油水分布规律以及成藏规律。认识到本区主体部位油藏主要受断层控制,以构造油藏为主,岩性油藏相对较少;第三系目的层岩性以砂泥岩薄互层为主,主要的油气藏形成于较薄的砂层中。由此建立起此类储层预测和评价的技术体系。 相似文献
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叠前弹性反演技术研究及应用 总被引:2,自引:0,他引:2
叠前地震反演克服了叠后地震反演储层信息量的不足,具有良好的保真性和多信息性,可提高储层的描述精度.本文针对涠西南凹陷古近系地层多物源湖相沉积,储层纵、横向变化大,开展叠前弹性反演研究,采取叠前保幅处理技术、岩石地球物理分析技术、高分辨率储层预测技术以及AVO属性分析技术,预测了砂层组的横向发育特征,比较可靠地揭示出地下储层的展布情况和油气状况. 相似文献
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