基于测井系列校正的趋势面分析法标准化研究          下载免费PDF全文

李姊桐  张庆国  邢小林 《地质找矿论丛》2018,33(2):272-277

对测井资料进行标准化处理是地质精细解释的前提,不仅能提高测井资料的准确性,并且能保障测井解释精度。本文采用趋势面分析法对测井资料进行标准化。在进行第一次标准化处理时,由于研究区内新老井应用多种测井系列测量,出现了由测井系列差异引起的异常点。因此,将测井系列校正纳入标准化处理流程,即当工区开发历时较久、范围较大、测井系列较多时,在测井资料标准化之前必须先进行测井系列校正;提出了测井系列校正的方法,应用该方法对测井资料校正后,再进行第二次标准化处理。其结果检验表明,处理后的测井信息更加符合区域地质规律,证明该思路符合实际需求,能更加准确地完成区块测井资料的标准化,可以推广至全区及其它类似工区。  相似文献   

山东临沂地区古生代复合热储成矿模式研究   总被引：1，自引：0，他引：1  

曹艳玲 《地质与勘探》2021,57(5):1136-1148

山东临沂地区地热资源丰富,前人对于临沂地区沂沭断裂带成热模式存在诸多争议。通过对研究区地热地质条件、地球物理特征和地热井数据进行综合研究,从地热产生的源、通、储、盖四要素进行分析,研究结果表明研究区地热成矿模式为古生代层状和带状复合热储地热成矿模式,断裂带为带状热储,断裂带周边稳定区域为层状热储。研究区热储为古生代砂岩,同时张性、张扭性断裂发育,导致热储为层状和带状的复合热储,较单一成因热储要复杂。对地热井数据归一化处理分析表明,盖层岩性及厚度对深部地热水温度存在较大影响,并且热储厚度对水温也存在影响,表现为表层有第四系覆盖的地热水温度,较无第四系覆盖的要高;盖层厚度越大,水温越高,热储厚度越大,水温也越高。这为进一步地热勘查与开采提供了理论指导。  相似文献   

Decomposition of functions for elliptic orbits     

Carlos Osácar  Jesús Palacián 《Celestial Mechanics and Dynamical Astronomy》1994,60(2):207-223

In the algebraA of functions periodic in the mean anomaly we relate the problem of integrating over the mean anomaly with that of decomposing an element ofA as the direct sum of two functions, one in the kernel of the Lie derivative in the Keplerian flow and one in the image of this Lie derivative. We propose recursive rules amenable to general purpose symbolic processors for accomplishing such decomposition in a wide subclass ofA. We introduce the dilogarithmic function to express in exact terms quadratures involving the equation of the center.  相似文献   

Hyperboloidal precession of a dynamically symmetric satellite. Construction of normal forms of the Hamiltonian     

Ivan I. Shevchenko  Andrej G. Sokolsky 《Celestial Mechanics and Dynamical Astronomy》1995,62(4):289-304

The Norma specialized program package, intended for normalization of autonomous Hamiltonian systems by means of computer algebra, is used in studies of small-amplitude periodic motions in the neighbourhood of regular precessions of a dynamically symmetric satellite on a circular orbit. The case of hyperboloidal precession is considered. Analytical expressions for normal forms and generating functions depending on frequencies of the system as on parameters are derived. Possible resonances are considered in particular. The 6th order of normalization is achieved. Though the intermediate analytical expressions occupy megabytes of computer's main memory, final ones are quite compact. Obtained analytical expressions are applied to the analysis of stability of small-amplitude periodic motions in the neighbourhood of hyperboloidal precession.  相似文献   

Contrasting origin of post-collisional high-K calc-alkaline and shoshonitic versus alkaline and peralkaline granitoids. The use of sliding normalization   总被引：41，自引：0，他引：41  

Jean-Paul Ligeois  Jacques Navez  Jan Hertogen  Russell Black 《Lithos》1998,45(1-4):1-28

Abundant high-K calc-alkaline (HKCA) magmatism appears to be post-collisional and often shifts to shoshonitic or alkaline–peralkaline compositions in the final stages of orogeny. The nature and the causes of this transition are studied on the basis of 308 major element and of 86 unpublished trace element (including REE) analyses of the Pan-African granitoids from the Tuareg shield (Adrar des Iforas, Mali and Aïr, Niger). This database covers a wide variety of magmas from subduction-related to intraplate-type including abundant HKCA batholiths. Literature data from geodynamically well-constrained cases are also included. In addition to a conventional geochemical approach of the studied magmatism, the sliding normalization method is proposed. This tool aims at comparing magmatic series: each studied rock is normalized to the interpolated composition of the reference series that has the same SiO₂ content as the sample. This method amplifies differences in sources and in fractionation processes and allows comparison of rocks from basic to acid composition. Two distinct juvenile sources are proposed: a previously enriched phlogopite-K richterite bearing lithospheric mantle or a lower juvenile crustal equivalent for HKCA-shoshonitic magmas, and a lowest lithospheric-upper asthenospheric OIB-type mantle for alkaline-peralkaline magmatism. The first source is melted only shortly after its generation when the lithosphere was still hot, which restricts HKCA magmatism mainly to post-collisional settings. The second asthenospheric/lowest lithosphere source is by definition close to its melting temperature and can generate magma ubiquitously both in space and time. The main melting triggers are lithospheric major structures which are not only operative in a post-collisional setting but also in other environments such as intraplate setting. Geochemistry thus gives indications about the nature of the source and on geotectonic settings. However, the latter is a second rank information, which is partly model-dependant. The post-collisional period differs from other settings by a propensity to generate large amounts of magma of various kinds, among which HKCA magmatism is volumetrically the most prominent.  相似文献   

塔克拉玛干沙漠砂归一化性状研究及工程应用     

水伟厚  高广运  韩晓雷  姚仰平 《上海国土资源》2002,(4):37-40,46

该文在对不同始干密度的塔克拉玛干沙漠砂压缩试验结果进行分析的基础上，引入了一条归一化压缩曲线并定义了与这相对应的坚一化因子。利用该归一化压缩曲线可计算不同初始干密度、不同应力范围下浙江省砂的压缩模量，并将其结果应用于沙漠地基的沉降计算。  相似文献   

瞬变电磁法在断裂构造上的异常反映   总被引：1，自引：0，他引：1  

龚惠民  查文相等 《中国煤田地质》2002,14(3):68-69

在水文地质及工程地质勘探工作中,寻找和查明断裂构造意义重大。众所周知,瞬变电磁法作为一种物探手法,已被广泛应用于地球物理勘探的各个领域。在断裂构造位置,瞬变电磁法表现为归一化二次电位衰减快,呈现双峰异常。根据瞬变电磁法的基础理论,解释瞬变电磁法在断裂构造上呈现双峰异常原因。  相似文献   

Normalization of seismic quantities and units     

冯义钧 《地震学报(英文版)》2002,15(2):234-238

In the seismological field, attention paid to the problem concerning the normalization of seismic quantities and their units has not been enough all along.  相似文献   

应用模糊数学方法提取水体面积信息          下载免费PDF全文

杨忠恩  骆剑承  徐鹏炜 《气象》1995,21(4):46-49

讨论了应用ＮＯＡＡ－ＡＶＨＲＲ资料提取水体信息的方法。采用１．２通道反射率数据构成的归一化植指数（ＮＤＶＩ）来识别水体，并初步提出了应用模糊数学方法提取混合像元中的水体面积信息。  相似文献   

基于小波变换的2D形状分析     

姬光荣  吕洪涛  陈霞 《中国海洋大学学报(自然科学版)》1997,(1)

提出一种以小波变换为基础，可以对２Ｄ形状进行旋转对称性检测、边缘轮廓的角点位置确定，并使方向规则化的分析方法。该方法的特点是：方便、准确、适合于多分辨率分析和噪声图象分析  相似文献