共查询到20条相似文献,搜索用时 62 毫秒
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1.系统的基本组成
总体设计上将系统分成四大模块:虚拟仪器面板模块、传感器校验模块、辅助设备校验模块、设备管理模块。虚拟仪器面板主要实现对实验室内常规测试仪器的替代,实现仪器测试的智能化、模块化、数字化。主要模块有:示波器面板、频谱仪面板、计数器面板、海量数字记录仪面板、智能万用表面板、任意波形发生器面板。传感器检验模块是在虚拟面板的支持下实现传感器的室内测试,同时兼顾野外现场的设备测试,主要完成绞车、泵冲、压力、温度、H2S、电导等传感器的测试与校验。辅助设备校验测试模块主要完成录井仪的辅助设备的测试。 相似文献
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我国岩心分析仪器的发展与展望 总被引:2,自引:2,他引:0
文章介绍了我国岩心分析仪器技术伴随油层物理实验技术的发展,经过了技术培育、技术消化及吸收、自我发展三个阶段。近几年来,国内许多专家在岩心夹持器、模拟油藏环境、仪器的模块化和标准化、参数测量方法等方面颇有研究,取得了诸多成果。今后的网络化智能传感器技术、虚拟仪器技术、计算机网络技术将决定岩心分析仪器技术的发展方向。 相似文献
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《Egyptian Journal of Petroleum》2022,31(2):7-14
The engine oil contains various performance additives along with polymer-based viscosity index improver, which are made from special types of flexible long chain polymers whose functionality is derived from their thickening efficiency, viscosity-temperature relationship, and shear stability. Olefin copolymers of the type ethylene/propylene copolymer are extensively used as viscosity index improver for engine oil formulations whose performance is a function of their composition, co-monomer sequence distribution and molar mass. Polymer coils interact with base oil and make it increasingly resistant to flow which accounts for substantial changes in viscosity parameters i.e. kinematic viscosities and viscosity index of blended base oils. Intrinsic viscosity of a polymeric solution is an important “dilute solution viscosity” parameter, which is easily measurable using Ubbelohde viscometer.In the present work, intrinsic viscosity of twenty samples of laboratory synthesized olefin copolymer in cyclohexane at 30 °C were correlated with their thickening efficiencies, kinematic viscosities of the olefin copolymer blended base oils at 40 °C and 100 °C. These correlation studies enable prediction of performance of olefin copolymer in blended base oil based on an easily and quickly measurable intrinsic viscosity parameter, leading to faster screening of large number of olefin copolymers for their utility as viscosity index improver in lubricants, in a short span of time with limited resources. 相似文献
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以异佛尔酮二胺(IPDA)与碳酸二甲酯(DMC)为原料,乙醇钠为催化剂,通过氨解法合成出目的产物,利用GC-MS和IR对目的产物进行了分析表征,并考察了合成条件包括原料配比、反应温度、反应时间、催化剂用量等对目的产物收率的影响。结果表明,产物分子的离子峰为286.3,结构与异佛尔酮二氨基甲酸酯(IPDC)一致;在催化剂用量(占原料的质量分数)为5%,n(DMC)∶n(IPDA)为6,反应温度为65~70℃,反应时间为7 h的优化条件下,产物IPDC的收率为83%。 相似文献
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交联聚合物溶液的热氧化及剪切安定性对其封堵性能的影响 总被引:1,自引:0,他引:1
摘要:采用核孔膜过滤和动态光散射(DLS)法,研究了高相对分子质量、低浓度的部分水解聚丙烯酰胺(HPAM)与柠檬酸铝(AlCit)反应所形成的交联聚合物溶液(LPS)的热氧化及剪切安定性对其在油藏深部调剖封堵性能的影响及其原因。结果表明,HPAM与AlCit反应所形成的LPS在90℃下热氧化降解24h后,对0.4 m 和1.2 m核孔膜不能形成有效封堵,降低过膜压力也不能改善其封堵性能。LPS经剪切降解后对1.2 m的核孔膜不能形成有效封堵,但对0.4 m的核孔膜能形成有效封堵;降低过膜压力能够增大对1.2 m核孔膜的封堵性能。LPS中交联聚合物线团(LPC)尺寸变小及HPAM与AlCit之间交联点的破坏分别是热氧化和剪切降解造成封堵性能下降的原因。 相似文献
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《Egyptian Journal of Petroleum》2022,31(2):51-58
The phenomenon of oil swelling at the oil-carbonated water (CW) system could be an important mechanism during the water alternating gas (WAG) injection process. Nevertheless, the study of the main mechanisms during water flooding (WF) is a complex topic that has not been well revealed so far, especially for asphaltenic crude oil (ACO) systems. Hence, the main goal of this experimental work is to determine the influence of carbon dioxide (CO2) within the water phase in the interfacial tension (IFT) between water and crude oil for an extensive range of pressures between 400 psi and 2000 psi (i.e. 2.76–13.79 MPa), under two temperatures of 313.15 and 323.15 K (i.e. 40 and 50 °C) by axisymmetric drop shape analysis (ADSA) method. The experimental results demonstrate that the water/ CW and crude oil IFTs decline with time. The value of dynamic IFT (DIFT) between CW and crude oil decreased about 6 mN/m in comparison with the oil–water DIFT. As a result of the CO2 solubility, the crude oil droplet swells with increasing pressure. When the temperature rises, the effects of increasing entropy phenomena and decline of liquids density is dominant compared to the solubility of CO2. Thus, the volume of oil droplet increases with temperature, unexpectedly. In addition, as thetemperature increases the water/CW-Oil IFT is slightly reduced over a wide range of pressure evaluated. Nevertheless, there is a slight increase as the pressure increases for the water–oil system. According to the predicted results, interfacial tension of the CW-oil system declines with increasing pressure until the solubility of CO2 is reached to a maximum value and then approximately remains changeless. 相似文献
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主分量分析和独立分量分析方法的比较研究 总被引:2,自引:1,他引:1
统计特征方法在信号处理、模式识别等领域的应用越来越广泛,特别是独立分量分析(ICA)在理论研究和实际应用中备受关注。主分量分析(PCA)和独立分量分析总的方法和思路比较相似。在分析PCA和ICA的原理及特点的基础上,分别用PCA和ICA对模型和实际地震数据进行了验证,并比较和分析了两者在信号处理中的特征提取能力。结果表明:在实现信号分离时,PCA分解后的各个分量仍然保持一定的相关性,而ICA分解后的各个分量保持独立。 相似文献
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阐述了现代企业制度的基本内涵,并从四个方面探讨了现代企业制度下完善内部审计监督的必要性:第一,健全内部审计监督是建立现代企业制度的客观要求;第二,内部审计自身的优势为现代企业制度下完善内部审计监督奠定了基础;第三,我国企业内部审计与国家审计、社会审计的不同特点,决定了现代企业制度下的内部审计工作必须进一步健全;第四,审计法律、法规为现代企业制度下完善内部审计监督提供了可靠保证。 相似文献
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共反射面元(CRS)叠加借助于菲涅耳带的理念,可以最大限度地提高信噪比。在CRS叠加中,叠加效果取决于波场运动学参数,因此对参数的搜索尤为重要,而一些局部优化算法效果受限于参数初值的选取。本文采用粒子群(PSO)算法实现对二维CRS参数的搜索,在不影响叠加效果的基础上,提高了参数搜索效率,大大缩短了计算时间。模型和实际数据处理结果验证了方法的有效性。 相似文献
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王炜 《石油工业计算机应用》2007,15(3):10-12
虚拟专用网(VPN)代表了当今网络发展的最新趋势,它综合了传统数据网络的性能优点(安全和QoS)和共享数据网络结构的优点(简单和低成本),并能够提供远程访问外部网和内部网的连接。目前VPN主要采用四项技术来保证安全,这四项技术分别是隧道技术(Tunneling)、加解密技术、密钥管理技术、使用者与设备身份认证技术。本文将重点介绍如何选择合适的隧道技术来实现陆梁自动化远程监控系统。 相似文献