氮气动力造穴技术在燓试71平3井的现场应用

在煤层气的勘探开发过程中,常常会遇到井打完了,见不到气,或者气量越来越小。导致这些情况发生的因素很多,常见的有储层通道空隙被煤灰堵死,气体不能顺地层空隙流出;储层与井筒连通性差,裸露面积小。针对这些情况,设计了气体动力造穴工艺,能够通过快速的气体压力波动,以使储层产生应力破坏导致井眼垮塌,增大储层裸露面积,破坏掉井眼周围泥浆污染通道堵死的煤层,通过高气体压力的憋与放能够将煤层空隙中的堵塞物-煤灰吐纳到井筒中来,通过洗井循环将煤灰循环出井筒。     

基于概念图与WCN的二次语义检索的研究

针对以用户目标为驱动的语义服务,提出了一种个性化的检索框架.采用加权概念网络表示用户模型.以概念图的形式定义需求中概念间的语义关联关系,充分表达用户的真实需求.给出了概念图与加权概念网络的匹配算法,对利用该算法得到的初步检索结果,考虑用户兴趣、职业特征及使用偏好等因素,进行二次排序,使得查询结果更富有个性化.实验结果表明,信息反馈的准确率得到了有效提高.     

巴彦河套盆地临河区块深层井壁失稳钻井液对策

巴彦河套盆地临河区块深层钻井过程中井壁失稳严重,制约油田的高效开发。利用X射线衍射、扫描电镜等分析测试方法对失稳地层岩样的黏土矿物成分和微观结构进行分析,确定井壁失稳原因主要是地层水敏性强,同时微裂缝发育,钻井液滤液侵入后,水楔作用下造成微裂缝扩张,地层水化引起坍塌压力的增加导致剥落掉块。解决井壁失稳的关键是针对性提高钻井液体系的抑制性和封堵性。结合现场钻井液技术需求,引入微纳米封堵剂提高钻井液体系的封堵能力、引入聚胺与KCl配合提高体系的抑制性能。室内实验表明,优化后的钻井液体系页岩膨胀降低率62%,滚动回收率可达90%以上。现场应用3口井,古近系地层平均井径扩大率小于20%,有效提高了巴彦河套盆地临河区块深层井壁稳定性,为油田的高效开发提供了技术支撑。     

真空制盐H—762轴流泵轴的电刷镀修复工艺研究及应用

前言 湖北省化工厂制盐分厂是一个年产25万吨工业用盐和1万吨商品盐的厂。H—762轴流泵是真空制盐中的关键设备。轴流泵的轴长2389mm,直径160mm,重360多公斤,材质为40Cr,见图1。由于在含盐10～30％     

Preparation and photoluminescence enhancement of Li＋ and Eu3＋ co-doped YPO4 hollow microspheres

Li+ and Eu3+ co-doped YPO4 hollow microspheres were successfully synthesized by a sacrificial template method using polystyrene (PS) as template. Techniques of X-ray diffraction (XRD), scanning electron microscopy (SEM), as well as transmission electron microscopy (TEM) were employed to characterize the as-synthesized sample. Furthermore, the photoluminescence (PL) characterization of the Li+ and Eu3+ co-doped YPO4 microsphere was carried out and the effects of the doping concentration of Li+ and Eu3+ active center concentration as well as calcination temperature on the PL properties were studied in detail. The results showed that the incorporation of Li+ ions into the YPO4 :Eu3+ lattice could induce a remarkable improvement of the PL intensity. The highest emission intensity was observed with the compound of 5%Li+ and 5%Eu3+ co-doped YPO4 , whose brightness was increased by a factor of more than 2.2 in comparison with that of the YPO4 :5%Eu3+.     

Fluorescence enhancement of Tb（Ⅲ） complex with a new β-diketone ligand by 1,10-phenanthroline

A novel β-diketone, 1-(3,4,5-trisbenzyloxy)benzoyl-5-benzoyl acetylacetone (TBAA), and its corresponding binary Tb(III) complex Tb(TBAA)₃·2H₂O and ternary complex Tb(TBAA)₃Phen with 1,10-phenanthroline (Phen) were prepared. The ligand was characterized based on elemental analysis, FT-IR, and ¹H NMR. The complexes were characterized with elemental analysis, FT-IR and thermogravimetry and derivative thermogravimetry (TG-DTG). Photoluminescence measurements indicated that the energy absorbed by the organic ligand was efficiently transferred to the central Tb³⁺ ions, and the complex showed intense and characteristic emissions due to the ⁵D₄→ ⁷F_J transitions of the central Tb³⁺ ions. Both complexes showed longer fluorescence lifetimes. After the introduction of the second ligand Phen group, the relative emission intensities and fluorescence lifetimes of the ternary complex Tb(TBAA)₃Phen enhanced more obviously than that of the binary complex Tb(TBAA)₃·2H₂O. This indicated that the presence of the ligand TBAA and the second ligand Phen could sensitize fluorescence intensities of Tb(III) ions, and the introduction of Phen group resulted in the enhancement of the fluorescence properties of the Tb(III) ternary rare earth complex.     

Fluorescence enhancement of Tb(Ⅲ) complex with a new β-diketone ligand by 1,10-phenanthroline

A novel β-diketone, 1-(3,4,5-trisbenzyloxy)benzoyl-5-benzoyl acetylacetone (TBAA), and its corresponding binary Tb(Ⅲ) complex Tb(TBAA)3·2H2O and ternary complex Tb(TBAA)3Phen with 1,10-phenanthroline (Phen) were prepared. The ligand was characterized based on elemental analysis, FT-IR, and 1H NMR. The complexes were characterized with elemental analysis, FT-IR and thermogravimetry and derivative thermogravimetry (TG-DTG). Photoluminescence measurements indicated that the energy absorbed by the organic ligan...     

PS基低发射率涂层的制备与性能研究

选择苯乙烯为粘结剂,漂浮性片状铝粉(约为15μm)为填料,用简单的流延自成膜法制备了低发射率红外隐身涂层;研究了溶剂种类和填料质量分数对涂层红外发射率的影响,并对涂层的物相和微观形貌进行了表征.研究结果表明:二甲苯为溶剂时涂层发射率最低为0.511;而在苯乙烯为溶剂时铝粉显示出更好的漂浮性,涂层发射率可低至0.314....