基于动态数据的无因次采液指数曲线计算方法

水驱油田无因次采液指数随含水率变化的规律是油藏产能评价和举升方式选择的重要依据.目前常用计算方法不适用于测试资料缺乏的油田.文中基于分流量方程、相对渗透率幂函数表达式和近似理论水驱曲线,推导建立了无因次采液指数随含水率变化的表征公式,提出了一种利用累计产油量和累计产液量等日常生产数据直接计算无因次采液指数曲线的方法.实...     

Synthesis and X-ray Powder Diffraction Characterization of A New Niobate Crystal Ba_4Na_2VNb_9O(30)

A new niobate crystal Ba4Na2 VNb9O30 was synthesized in BaO-Na2O-V2O5-Nb2O5 system for the first time. Its shape, optical properties , melting point and chemical stability were studied. X - ray powder diffraction study determined that this compound assumes a tetragonal tungsten bronze structure with space group P4bm(100) and lattice parameters a = b= 12.4275(2),e=3.970(3). The new compound may be one kind of photorefractive crystals.     

Crystallization and luminescence properties of Eu<Superscript>2+</Superscript> doped diopside glass ceramics

Eu²⁺ doped glass ceramics have been prepared and characterized. The crystallization and optical properties of the glass ceramics were studied by XRD, SEM, and fluorescence spectra. The precipitated crystalline phase in the glass ceramics was prismatic diopside (CaMgSi₂O₆) and plate-like cristobalite (β-SiO₂). As the heat treatment time increases, the content of crystals increases gradually. Fluorescence measurements showed that Eu²⁺ ions entered into the diopside crystalline phase and induced a much stronger emission in the glass ceramics than that in the corresponding glass. With increase of Eu²⁺ content, concentration quenching was observed.     

粉刷石膏复合外加剂的研制

用石灰等天然非金属矿物材料与有机外加剂制成了新型粉刷石膏复合外加剂,研究了这些外加剂对粉刷石膏听凝结特性,保水性,粘结力及强度的影响。     

含渣土的EPS轻质混凝土用于复合夹芯墙板芯材的研究

为提高地铁渣土资源化利用率,将其掺入膨胀聚苯乙烯(EPS)轻质混凝土中,并用此混凝土为芯材制备复合夹芯墙板,研究了浆体的流变性,并探讨了硬化EPS混凝土的抗压强度、导热系数及EPS颗粒在浆体中的面分布。结果表明:随着渣土掺量增加,浆体屈服应力增加,流动度降低;浆体塑性黏度随渣土掺量增加大幅度增加,使得EPS颗粒分布更加均匀;EPS混凝土的干密度、抗压强度与导热系数随渣土掺量增加而逐渐降低。当干渣土与水泥质量比为0.8时,EPS混凝土的干密度为857 kg/m³,抗压强度为4.16 MPa,导热系数为0.231 W·m^-1·K^-1;采用干渣土与水泥质量比为0.8的EPS混凝土制备复合夹芯墙板(硅钙板作面板),墙板粘结性能良好,面密度为81 kg/m²,抗压强度为3.75 MPa,软化系数为0.83,耐火极限大于1 h,其性能满足轻质隔墙条板国家标准要求。     

铌酸盐光催化剂的制备及其应用

介绍了铌酸盐光催化剂制备的主要方法,包括固相反应法、水热法、溶胶-凝胶法及化学共沉淀法;综述了目前国内外应用铌酸盐化合物在光催化分解水、光催化降解有机物、合成有机物、去除工业烟气和汽车尾气NOx等方面取得的研究进展。     

层状BiOCl—云母珠光颜料的研制

介绍了氯氧化铋（BiOCl)、BiOCL-云母及Ti或Zr改性的BiOCl－云母珠光颜料。经测试表明，Ti或Zr改性的BiOCl－云母珠光颜料的光泽及耐候性大大提高，并分析了该改性方法提高BiOCl珠光颜料的光泽及耐候性的机理。     

水平井射孔技术

随着油田开发的深入发展,水平井开采呈日趋上升之势,射孔作为油气田勘探开发中的主要完井方法,其工艺技术也需要不断跟进完善。文章通过对长庆油田近几年的水平井射孔施工进行了分析,为射孔器的相位设计、起爆方式选择、校深定位以及施工注意事项提供了参考依据。     

DEVELOPMENT OF SEPIOLITE TYPE FILTER TIPS OF CIGARETTE

Activating conditions of sepiolite are studied by determining specific surface method. Sepiolite is used in processing filter tip of cigarette of acetate silk and paper type first. Tar of cigarette with sepiolite filter tip is lowered to a lower tar level. Mechanism of the lowered tar content by sepiolite is analysed.     

水冷熟料的微观特征及其早强特性的研究

利用扫描电子显微镜研究了水冷熟料的微观特征及水化物微晶的形态,指出了水泥熟料微水化形成的极少量水化产物微晶对水泥的质量和性能无不良影响;相反,这些片状、粒状、针状微晶可以加速水泥的水化,提高水泥的早强强度.