水平井中三维感应测井响应分析与资料处理应用

为解决三维感应仪器(3DIT)在水平井推广应用过程中遇到的现实技术难题,从分析水平井中三维感应测井响应特征着手,建立水平井中三维感应测井资料处理方法,进一步发掘三维感应测井仪器在水平井开发中的应用价值。首先,基于均匀单轴各向异性地层模型,定量分析三维感应仪器测井响应与地层水平电阻率和垂直电阻率的变化关系。其次,基于三层平面分层地层模型,利用测井响应数值计算软件进一步模拟地层水平和垂直电阻率、围岩电阻率、层厚、倾角、仪器探边距离等参数对仪器响应的影响,建立三维感应测井响应特征数据库,并形成水平井中三维感应测井邻层影响校正图版。在此基础上,初步建立以视值处理和图版校正为核心流程的水平井三维感应测井资料快速有效的处理方法。实际测井资料处理揭示了三维感应测井在水平井目的层地质构造描述和储层评价中有重要的应用价值。

区域负荷资源的聚合响应潜力评估方法

聚合响应作为电力负荷管理的新型手段,挖掘区域电力负荷中的灵活性资源,是实现国家“双碳”目标的重要途径,有助于推动加速形成新质生产力。区域电力负荷数量众多、类型结构复杂,需通过负荷特征辨识,分析不同类型负荷的响应潜力,聚合形成区域高响应率资源池,为电力系统安全稳定可靠运行提供基础。以实际区域电力负荷数据为例,分析其负荷资源聚合响应潜力,研究提出一种考虑聚合性能评价的基于响应特征分析的聚合响应潜力评估及挖掘的普适性方法,为进一步推动中国区域负荷响应资源的探索研究与深入挖掘提供参考。利用英国国家电网公布的区域电网负荷数据,采用所提出方法进行算例分析验证,结果表明:(1)该方法可以有效识别出区域负荷资源中不同负荷群组的响应特性,当各类群组响应特性差异较大时,根据群组特性统一调度管理可实现响应资源的有效聚合与评估;(2)该方法有针对性地挖掘区域负荷的响应潜力,与传统电力负荷分类方法相比,资源池整体聚合响应能力可提升23.62%至25.11%,显示出其在聚合响应潜力挖掘方面的显著优势;(3)该方法可有效识别区域负荷响应潜力的能力缺口并针对不同的能力缺口,制定差异化的群组资源挖掘方案,为未来进一步提升区域聚合响应能力形成规划建议。据此提出中国可以通过聚合响应技术挖掘电力负荷中的灵活性资源,提高区域负荷响应潜力,构建高效能源体系,加快产业绿色低碳转型,强化科技支撑,积极推进碳中和等相关建议。

Study on Improvement of Seismic Performance of Transmission Tower Using Viscous Damper

The earthquake resistance of transmission tower has been often discussed from the viewpoint of reinforcing the foundation of steel tower, but there are also few studies considering the damping characteristics of the tower. This paper focuses on the viscous damper which has been adopted for seismic reinforcement of bridges in recent years. The purpose of this study is to improve the seismic performance of steel tower by giving the high damping to the tower. We construct a single tower model considering the influence of transmission line, and then simulate the vibration characteristics and seismic behavior of the tower by the eigenvalue analysis and the dynamic response analysis. The results show that the transmission tower with viscous damper can reduce its own response effectively and drastically. This research concludes that it is necessary to consider the extreme increase of steel tower＇s response depending on the seismic wave and the collapse of steel tower can be avoided by using the optimum damper in the design of the transmission tower.

结构疲劳损伤演化过程的多尺度同步观测与分析

大型土木结构的失效劣化过程是一个跨尺度损伤演化过程,在相同的时间节点不同的空间尺度下,通常表现出独特的损伤演化响应特征和力学特性。该文以某大型桥梁纵向加劲钢桁架的缩尺模型为研究对象开展疲劳损伤演化过程多尺度同步观测试验工作,综合运用电测技术、光测技术和动态测试技术实时监测桁架疲劳损伤演化过程,据此分析对比桁架在细观和宏观尺度下的损伤演化响应特征和力学特性。在电测技术观测到桁架局部疲劳裂纹萌生之后,光测和动态测试技术得以继续追踪疲劳裂纹的扩展过程并评价局部损伤演化对构件以及结构整体力学特性的影响,结果表明:结构局部细观尺度上的损伤演化不至于影响结构宏观尺度的整体力学特性,但是局部损伤的累积必将导致结构失效劣化。

Tidal Response Characteristics of the Well Water Level in the Sichuan-Yunnan Region

In this paper,the long time series data of the well water-level data of 12 wells in the Sichuan and Yunnan area is analyzed by the Baytap-G tidal analysis software,and well water level tidal response characteristic parameters( amplitude ratio and phase change)are extracted. We analyzed the features of the shape and stage change,and characteristic parameters of the tidal response of well water level before and after the earthquakes,which can provide a new method and approach to analyzing the response relationships between well water level and earth tide and barometric pressure. The results show that Luguhu Well and 9 other wells are affected by earth tides,and their well water level amplitude ratios and phases are relatively stable; the Nanxi Well and Dayao Well water level changes are affected by the barometric pressure combined with tide force,and their well water level amplitude ratios and phases are more discrete. The water level amplitude ratios and phases of Jiangyou Well,Luguhu Well and Dongchuan Well are significant to large earthquakes,and the relationship between seismic energy density and water level amplitude ratios and phases of M_2 wave of the three wells are presented.