复杂岩性有效储层地震预测技术——以B气田大安寨段一亚段气藏为例

根据B气田取心资料、野外露头、钻录井资料以及前人研究成果发现,B气田大安寨段一亚段发育滨湖、浅湖沉积亚相,储层主要为浅湖亚相介壳滩微相,储层岩性复杂,为特低孔、低渗的孔隙型储层。如何从致密复杂的岩性中识别出有效储层是研究的重点。文中运用以沉积相为指导,测井分析为基础,"相控"+"储控"为核心,地震多参数反演为主要手段的储层综合预测技术,预测了B气田大安寨段一亚段储层的展布特征、有效储层厚度及孔隙度。由此形成了一套致密复杂岩性有效储层地震预测技术序列。该技术经钻井证实,应用效果良好,为勘探部署提供了技术支撑。     

The effect of N-containing compounds on oxidative desulphurization of liquid fuel

The oxidative removal of organic sulfur compounds from model fuel with H₂O₂ over Ti-containing molecular sieves in the presence of N-containing compounds had been studied. The effect of the types and amounts of nitrides on oxidative desulphurization were investigated. It has been shown that pyridine and pyrrole have adverse impact on the oxidation of thiophene and lead to the decrease of corresponding removal rate. The pyridine has stronger influence than pyrrole. Quinoline and indole have no impact on the final removal rate of thiophene. However, the two kinds of nitrides, as well as carbazole, have obvious impact on the oxidation removal of benzothiophene and 4,6-dimethyl dibenzothiophene. The effect of nitrides on oxidative desulphurization can be attributed to the strong adsorption of nitrides and their oxidized products on the active sites of catalysts. For pyridine and quinoline, which are basic nitrides, their adsorptions on catalysts are even stronger than that of sulfides.     

Carbon Sequestration Within Silica Bodies Extracted from Kelp Cultured in the East China Sea

To re-evaluate ecological effects of kelp culture in marginal seas, the silica body content in kelp cultured in the East China Sea and the carbon content in the silica body extracted from kelp were measured. The silica body content in kelp cultured in the sea ranged from 0.20 to 0.60 % and the carbon content in the silica body extracted from kelp was 0.27 ± 0.06 %. The carbon sequestration rate in silica bodies extracted from kelp cultured in the East China Sea was 2.47 ± 0.40 t.a^?1 from 2000 to 2011. In the East China Sea, the production of the silica body of kelp in the kelp culture zone was 6.56 ± 1.06 g.m^?2.a^?1. The carbon sequestration rate in the silica body of cultured kelp in the East China Sea was 0.02 ± 0.00 g.m^?2.a^?1, which accounted for 1.43 % of CO₂ flux from air to sea. The carbon fixed in the silica body extracted from kelp might be one part of the missing carbon sink. Considering carbon content in silica bodies extracted from kelp cultured in the East China Sea, carbon sequestration of kelp culture in the marginal sea should be re-evaluated and some missing carbon sinks caused by anthropogenic factors might be reduced.     

支撑液膜提取柠檬酸的传质机理

研究和探讨柠檬酸提取的化学过程,论述了反萃取剂Na2CO3与溶质柠檬酸的最终化学计量比并非是化学反应比3∶2而是1∶1,甚至更低,也就是说,在反萃取相中不仅存在C6H5O73-,而且存在HC6H5O72-或H2C6H5O7-.提高反萃取剂的浓度对溶质提取有利.为深入研究该技术提供了理论依据.     

考虑土分层的搅拌桩支护结构性能研究

将水泥土搅拌桩支护结构及土体视为共同变形的整体,建立了三维有限元模型,选用Drucker-Prager本构模型及非线性增量迭代法,以泉州某基坑为工程原型,利用ANSYS工程计算软件,进行了模型验证,并详细讨论了各支护参数变化时水泥土搅拌桩的位移、应力分布。揭示了地面堆载、墙体厚度、不同土层性质及其分布对搅拌桩位移、应力的影响,墙体位移和应力的关系,分步开挖对搅拌桩位移的影响及合理布置开挖步需考虑的因素。     

生物选择器的体积比对氧化沟运行效果的影响研究

采用前置生物选择器的Carrousel氧化沟系统研究生物选择器对氧化沟运行效果的影响.结果表明:生物选择器的体积比对COD的去除和硝化反应影响不明显,但对反硝化反应和总磷的去除有一定影响;当体积比＜4.86％时,随着体积比的增大,总氮去除率呈上升趋势,而总磷去除率则逐渐增大.继续增大体积比,总磷变化不明显而总氮去除率下...     

拟声波反演技术在优质泥页岩储层预测中的应用——以焦石坝页岩气田为例

四川盆地焦石坝地区下志留统龙马溪组下部沉积了一套较厚的海相暗色泥页岩,由于其含气的优质泥页岩储层速度、密度变化小,波阻抗响应特征不明显,利用常规波阻抗反演技术进行优质泥页岩的定量预测存在困难。为此,提出了利用拟声波反演进行优质泥页岩定量预测的技术,即基于优质泥页岩具有高TOC值的这一特征,首先利用小波多尺度分解技术提取声波测井曲线中的低频信息,再利用信息融合技术将TOC曲线与原始声波曲线重构成拟声波曲线,结合该区地震数据和稀疏脉冲波阻抗反演技术实现了优质泥页岩的定量预测。预测结果表明:该区龙马溪组下部的优质泥页岩整体发育,主体部位优质泥页岩厚度大于35m,由东北向西南优质泥页岩厚度增加。拟声波反演预测结果与后续实钻结果基本一致,预测误差小于1m,同时龙马溪组优质泥页岩的纵横向展布特征也得到了有效刻画。     

220kV双母线接线倒母线操作安全分析及对策

结合实际情况就倒母线操作原则和过程进行阐述及对过程中危险点进行了分析,并提出了预控技术措施。     

高功率脉冲磁控溅射TiNb靶材等离子特性及其对薄膜性能影响EI北大核心CSCD

为了研究高功率脉冲磁控溅射TiNb靶材等离子特性及其对薄膜结构性能的影响,采用高功率脉冲磁控溅射技术(HiPIMS),通过改变TiNb靶材的峰值溅射功率在Si(100)和316L基体上沉积TiNb薄膜,利用等离子发射光谱(OES)研究峰值功率对基片前离子原子比的影响,采用X射线衍射技术(XRD)、扫描电子显微镜(SEM)、透射电镜(TEM)、纳米硬度计、球盘往复摩擦机以及电化学工作站等试验设备,研究Ti、Nb离子原子比对TiNb薄膜微观结构、力学性能及耐腐蚀性能的影响。结果表明,Ti和Nb离子原子比率随峰值功率增加而增加,在峰值功率为59.42 kW时Ti的离子原子比达到60%,Nb的离子原子比达到56.9%,离化原子比相对于峰值功率35.98 kW时增加1倍。不同峰值功率下制备的薄膜均出现BCC结构的β-TiNb(110),β-TiNb(200)和β-TiNb(211)衍射峰,薄膜以纳米晶存在,高的Ti、Nb离子原子比可以增加晶粒尺寸,降低TiNb薄膜残余压应力,引起薄膜的硬度、耐磨性以及耐腐蚀性能下降。低的峰值功率下可以得到力学性能及耐腐蚀性能更好的薄膜。