用测井方法确定深部隐伏构造的实例一则     

张德权  贺颢  张彦林  陈韶 《物探与化探》2004,28(4):298-299,319

通过1个实例,说明应用测井方法并结合区域地质资料进行综合对比分析,可了解区域范围内地下隐伏构造和不同层系的地层岩性在空间上的展布,找出赋存地下水的有利地段。  相似文献   

剔除高密度电阻率法三极装置浅部不均匀体效应影响的方法及效果     

邓晓红  方慧  奚家鉴  赵敬洗  徐宝利 《物探与化探》2004,28(4):314-316

基于总结出的高密度电阻率法三极测量装置下的二维正演拟断面中浅部不均匀体畸变规律和特征,设计了一套能有效剔除三极测量装置浅部不均匀体效应影响的数据处理方法,成功应用于野外实测数据的处理。  相似文献   

南泥湾油田工业油流标准参数确定及算法     

刘建宏 《西北地质》2004,37(3):73-76

针对南泥湾油田特点。确定适合本区地质及油藏工程特点的工业油流标准，提高该类油田储量的计算精度。应用数值模拟、类比等方法。结果显示．南泥湾这类必须经过压裂改造的特低渗油藏．单井产量仍然按照双曲线递减规律；工业油流标准的确定，需要准确把握单井平均总投资、原油利润、收回单井总投资的单井产量等参数，在此基础上确定的工业油流标准更能满足生产需要，对储量计算、滚动开发建产、管理者决策具有十分重要的意义。  相似文献   

土参数对桩基水平响应影响的研究   总被引：1，自引：3，他引：1  

王腾  董胜  冯秀丽 《岩土力学》2004,25(Z1):71-74

桩基的水平响应由桩土间的相互作用决定,通过采用p-y曲线来表示桩土间的非线性相互作用。通过算例,讨论分析了粘性土参数的变化对p-y曲线中土体的极限强度和刚度、桩基水平位移和弯矩分布及最大弯矩和水平荷载关系的影响。  相似文献   

视电阻率观察中一种抗介质干扰的尝试     

唐宇雄  张茂军  夏坤涛  龙明友  李绍坤  颜晓晔 《四川地震》2005,(4):40-46

埋地金属管线对视电阻率的观测危害甚大。造成观测值大幅改变，跳动，无规律可循。严重时，甚至台站报废，被迫搬迁。通过一些突发事件的启发，结合现场实验，并引证了一些理论计算，笔者摸索出了只须对金属管道作局部微小的改造，就能基本克服其对观测的干扰的方法。该方法在红格台试验半年多来，取得了明显的效果。观测值恢复到安装的水管以前的水平，再无大幅度的跳动。该方法节约经费，简单易行，大大提高了台站在复杂环境中的生存能力。  相似文献   

储层岩石电性特征的逾渗网络模型研究(英文)     

王克文  孙建孟  关继腾  苏远大 《应用地球物理》2005,2(4):223-229

建立能够反映储层孔隙结构、流体特征的逾 渗网络模型,通过数值模拟研究了储层孔隙尺寸、 孔隙形状、连通性、微孔隙的发育状况等对I-Sw曲 线影响的定性规律,研究了地层水矿化度对岩石电 阻率的影响。分析讨论了不同因素对电阻率影响的 相对强度。最后,通过曲线拟合定量地研究了不同 因素对I-Sw曲线的影响规律。研究表明,在上述影 响因素中连通性和微孔隙对I-Sw曲线的影响很大, 其它因素的影响强度较小。地层水矿化度对岩石电 阻率绝对值的影响很大。“非阿尔奇”现象普遍存在, 在低渗透(低连通性)储层岩石中更为明显。  相似文献   

嘉山地震台地电阻率数字化改造     

赵桂宝 《地震地磁观测与研究》2005,(Z1)

地球科学是一门观测科学,地震观测是研究与应用的基础。地电阻率作为地震前兆观测手段之一,发挥着日益重要的作用,而良好的观测系统是产出连续、可靠、高质量数据的前提。因此,对观测系统的数字化改造工作必须予以高度重视。本文对嘉山台地电阻率数字化改造工作进行了简要介绍,并就一些技术问题进行了论述。  相似文献   

Wavelet analysis and interpretation of gravity data in Sichuan-Yunnan region, China   总被引：4，自引：0，他引：4  

楼海  王椿镛 《地震学报(英文版)》2005,18(5):552-561

Introduction Sichuan-Yunnan region, located in the east margin of Qinghai-Xizang (Tibetean) Plateau, is a transitional zone between the rapidly upheaving Tibetean Plateau and relatively steady Yangtze Platform. Under the pressure exerted by the northward movement of Indian Plate, Sichuan-Yunnan region has been undergone strong deformation and regmagenesis, becoming one of the regions with the most intensive seismicity in the world. The research on the tectonics and seismicity there is alw…  相似文献   

A review of paired catchment studies for determining changes in water yield resulting from alterations in vegetation   总被引：21，自引：0，他引：21  

Alice E. Brown  Lu Zhang  Thomas A. McMahon  Andrew W. Western  Robert A. Vertessy   《Journal of Hydrology》2005,310(1-4):28-61

Paired catchment studies have been widely used as a means of determining the magnitude of water yield changes resulting from changes in vegetation. This review focuses on the use of paired catchment studies for determining the changes in water yield at various time scales resulting from permanent changes in vegetation. The review considers long term annual changes, adjustment time scales, the seasonal pattern of flows and changes in both annual and seasonal flow duration curves. The paired catchment studies reported in the literature have been divided into four broad categories: afforestation experiments, deforestation experiments, regrowth experiments and forest conversion experiments. Comparisons between paired catchment results and a mean annual water balance model are presented and show good agreement between the two methodologies. The results highlight the potential underestimation of water yield changes if regrowth experiments are used to predict the likely impact of permanent alterations to a catchment's vegetation. An analysis of annual water yield changes from afforestation, deforestation and regrowth experiments demonstrates that the time taken to reach a new equilibrium under permanent land use change varies considerably. Deforestation experiments reach a new equilibrium more quickly than afforestation experiments. The review of papers reporting seasonal changes in water yield highlights the proportionally larger impact on low flows. Flow duration curve comparison provides a potential means of gaining a greater understanding of the impact of vegetation on the distribution of daily flows.  相似文献   

Establishment of apparent quantum yield and maximum ecosystem assimilation on Tibetan Plateau alpine meadow ecosystem     

XU Lingling  ZHANG Xianzhou  SHI Peili  YU Guirui 《中国科学D辑(英文版)》2005,48(Z1)

The alpine meadow is widely distributed on the Tibetan Plateau with an area of about 1.2×106kn2. Damxung County, located in the hinterland of the Tibetan Plateau, is the place covered with this typical vegetation. An open-path eddy covariance system was set up in Damxung rangeland station to measure the carbon flux of alpine meadow from July to October,2003. The continuous carbon flux data were used to analyze the relationship between net ecosystem carbon dioxide exchange (NEE) and photosynthetically active radiation (PAR), as well as the seasonal patterns of apparent quantum yield (α) and maximum ecosystem assimilation (Pmax).Results showed that the daytime NEE fitted fairly well with the PAR in a rectangular hyperbola function, with α declining in the order of peak growth period (0.0244 μmolCO2 · μmol-1pAR) ＞early growth period ＞ seed maturing period ＞ withering period (0.0098 μmolCO2 · μmol-1pAR).The Pmax did not change greatly during the first three periods, with an average of 0.433mgCO2· m-2· s-1, i.e. 9.829 μmolCO2· m-2· s-1. However, during the withering period, Pmax was only 0.35 mgCO2 · m-2 · s-1, i.e. 7.945 μmolCO2 · m-2 · s-1. Compared with other grassland ecosystems, the α of the Tibetan Plateau alpine meadow ecosystem was much lower.  相似文献