横波地震基本理论的研究

The people have highly attached importance to the technipues of S-wave seismics. It is basic
premise of S一wave exploration or combining S-wave and P-wave study the basic theory for S-wave seismics. In the basic theory，especially，seismic-wave velocities(V_p,V_s) and its ratio(V_p,V_s) must be studied.
     

喀斯特流域岩性与枯水径流特征值的灰色关联度分析

喀斯特流域枯水径流特征值的影响因素很多,如气候、流域面积、岩性、土壤、地貌等等,而能够确知的信息不多。本文视喀斯特流域为灰色系统,对流域枯水径流特征值与岩性组成之间的灰色关联度及灰色相对关联矩阵进行分析,从而揭示枯水径流特征值与流域面积和岩性之间的关联规律。      

Influence of borehole quantity and distribution on lithology field simulation

This paper aims to study the influence of the number and distribution of drill samples on the simulation accuracy of the lithology field. This research mainly applies the variation function method in geo-statistics, and determines important indicators such as the variation, and then the lithology field is simulated by sequence index simulation. It is shown that(1) simulation error decreases with the increase of sampling density;(2) at the scale and complexity of this study, when the sampling density reaches 40/km^2, the average error of the lithology field simulation can be less than 2.0%;(3) in the study mode of examples, the simulation results of random sampling in the whole region are the most ideal, with an average error of 5.4%. The average error of the simulation results of the centralized sampling is about 10 times that of the random sampling method;(4) known from the influence analysis of the degree of study sample unevenness influence on the imitation results, under the same sample size, the simulation error decreases with the increase of the most adjacent index. When the nearest index reaches 1, the simulation error will be less than 6%, and the error variable range is within 3%.     

Distribution of Grain Size and Clay Minerals in Sediments from the INDEX Area, Central Indian Basin

The granulometry of 21 box core sediments from five selected sites in the Central Indian Basin (CIB) have been studied to understand the sediment size characteristics in the Pioneer area before the benthic disturbance experiment. The sediments are predominantly clayey silt. Statistical parameters were determined to understand the control and variations in the grain size. The mean grain size (M z φ) ranged from 7.0 to 8.6 for the surface and from 6.6 to 8.6 for the subsurface sediments, indicating deposition of very fine fractions during the Neogene period. The sediments were poorly sorted as revealed from the higher σI values (2.7 to 2.9). Higher and negative values of skewness (SK I ) indicated a winnowing action of prevailing currents in the area. Average kurtosis (K G ) values for the surface (0.4 to 0.8) and subsurface (0.5 to 1.2) showed that sediments were very platykurtic and leptokurtic. Clay mineralogical studies showed that smectite had a wider range (from 6% to 55%) and decreased southward because of its terrigenous origin. The terrigenous influence of the sediments could be documented as far as 12°S. Smectite and kaolinite increased eastward and chlorite decreased southward. This observation positively correlated with the mean current direction in the area. However, the influence of Antarctic Bottom Water (AABW) in the area could be predicted from the southward increase in chlorite content.     

山东黄金资源钻探井测井资料分析方法与应用

山东胶东地区为多期次岩浆活动与变质作用的产物,岩石以变质岩和岩浆岩为主。由于构造活动频繁,且处于断裂带上,岩石破碎带发育。本次科学钻探测井分析的主要任务是岩性识别与破碎带识别和划分。首先围绕岩性识别研究了多种测井交会图技术,实现了研究区钻遇的变辉长岩、片麻岩、二长花岗岩等的岩性识别,并总结了其测井响应特征。针对裂缝和破碎带分析,提出了应用主成分分析方法,并且识别结果与岩芯描述比较一致。上述岩性分析和裂缝、破碎带的测井解释结果对寻找黄铁矿石英脉起到较为重要的作用,也为综合地质信息的研究提供了可靠资料和依据。     

地层岩性对重庆渝东南渝东北地区岩溶地下水的富集影响分析

重庆市渝东南渝东北碳酸盐岩地区岩溶发育程度以灰岩类最发育,白云岩类次之,泥质灰岩类发育最弱;灰岩中的岩溶大泉、暗河数量多于白云岩类,白云岩中的岩溶大泉和暗河数量远远大于泥质、硅质岩类;而钻井成井率大小为白云岩类>灰岩类>泥质、硅质类。在岩溶找水工作中,不同地区应因地制宜,选择不同的找水方式。     

鄂尔多斯盆地西南缘岐山地区中奥陶统沉积特征及沉积环境研究

本文通过野外剖面实测、样品采集、薄片鉴定等手段,收集地球化学数据及前人研究材料,对岐山地区岩性组合、沉积构造进行了研究,分析其中奥陶统沉积环境演化过程。结果表明,岐山地区在中奥陶统下马家沟组早期沉积白云岩,为局限海台地环境;下马家沟组中、晚期沉积中厚层状灰岩,为开阔海台地环境;上马家沟组沉积厚层的纹层状灰岩夹碎屑流、浊流等深水沉积建造,水体逐渐加深,并进入台地前缘斜坡沉积环境;峰峰组发育厚层的纹层状灰岩,为台地前缘斜坡环境并向深水海盆靠近。由此判断岐山地区应为南缘凹陷上,除淳化-旬邑次级凹陷以外的另一个水体更深、坡度更大的次级凹陷。     

克拉玛依六区——九区石炭系火山岩油藏岩性识别与岩相划分

根据克拉玛依石炭系火山岩岩屑录井描述、岩心薄片鉴定、常规测井资料,通过分析不同类型的火山岩对测井参数的敏感性和响应特征,用统计学方法研究常规测井参数与不同类型火山岩之间的对应关系,建立了电阻率、自然伽马与岩性关系图版。进一步研究了六区—九区石炭系火山岩的岩性、岩相特征、分布规律及与含油性的关系,为今后此类油藏的岩性识别与岩相研究提供了可借鉴的方法。