lithostratigraphic boundary

In view of the division of lithology, biostratigraphy and optimal partition of geochemical elements of the Permian-Triassic boundary strata, it is testified that the conodont Hindeodus parvus can be regarded as a biostratigraphic criterion of the lowest part of the Triassic and the Permian-Triassic boundary strata of this area is successiv.

本文以选部益哇沟剖面为例，对该区界线地层进行研究，从岩石地层划分、生物地层划分以及地球化学元素最优分割研究出发，确定了二叠、三叠系界线点，证明牙形石Ｈｉｎｄｅｏｄｕｓｐａｒｖｕｓ可作为三叠系开始的标志，并且二叠、三叠系是连续的。

The cementation quality experiments testing cement with different formation lithology were examined in the simulated high pressure deep well in sandstone or shale with different porosity and permeability.

为此,采用自行研制开发的JHT-02高温高压固井质量评价仪(物理模型按10∶1缩小,并制作了相应的缩小换能器),模拟高压深层井段不同孔隙度与渗透率的砂岩与泥岩,进行了水泥与不同岩性地层胶结性能的试验,对比试验结果及现场测井曲线,发现:对于深井中存在异常高压的井段,地层岩性和孔渗性能影响水泥与地层的胶结强度,随着孔渗性能的变化,水泥与泥岩和砂岩地层的胶结强度变化规律一致,随孔隙度与渗透率的增加胶结强度下降;在高压常温环境下,水泥与砂岩地层的胶结强度要低于水泥与泥岩地层的胶结强度;对于相同渗透率的泥岩地层,高压带较低压带胶结更理想;建议在高压常温井段选择合适的钻井液体系,防止水泥浆在高渗地带过多失水,以提高固井质量。

Based on the downhole complicated conditions analysis of deep wells and ultra-deep wells in Kuche region,and comprehensively considering the influence factors,such as formation lithology and formation pressure,the probability density function of downhole complicated conditions was determined using the existing data by the probable theory method.

在对库车地区深井超深井井下复杂情况分析的基础上,综合考虑地层岩性和地层压力等影响因素,根据已有资料,用随机理论方法确定发生井下复杂情况的概率密度函数,得出井下复杂情况发生的位置及可能性,提出新的井身结构必封点确定方法。

Based on the data obtained in the engineering geologic investigation,this paper makes analysis and evaluation on the landforms and formation lithology of Xiashijiazhuang Reservoir.

在工程地质勘测所获得资料的基础上,对下石家庄水库地貌与地层岩性进行了分析与评价。

A conclusion is drawn that,topography,stratum lithology,geological structures and river erosion are the primary causes of landslides,but rainfall and human engineering activities are main factors to draw forth landslides.

分析表明地形地貌、地层岩性、地质构造以及河流侵蚀是滑坡形成的基础,而降雨和人类工程活动是其形成的诱发因素。

Based on the Zoeppritz′s equation seismic multiwave AVA inversion of stratum lithology parameter has been discussed in this paper.

以 Zoeppritz方程为基础 ,对多波 AVA地层岩性参数反演进行探讨。

35 km2),and analyzed the relationships between site type groups and stratum lithology.

35 km2,并分析了各地层岩性在各类立地类型组的分布关系;然后利用敏感性系数SC,分析了研究区内崩塌滑坡对地层岩性的敏感性,根据区域实际情况将敏感性系数划分为4个等级,其中极敏感区占研究区的29。

DEFINING AND COMPARISING FOR MID-LATE PROTEROZOIC ERA STRATA IN EAST YUNNAN

云南东部中—新元古代地层界线的厘定与对比

RESEARCH OF PERMIAN-TRIASSIC BOUNDARY STRATA,IN WEST QINLING AREA

西秦岭地区二叠—三叠系界线地层研究

The Balcones Fault is the geological dividing line.

鲍尔肯断层是地理分界线。

Observation On The Devonian-Carboniferaus Boundary Beds in Belgium and Western Germany

比利时、西德泥盆—石炭系界线地层考察

Jurassic-Cretaceous Boundary Strata in Southern Tibet;

西藏南部海相侏罗纪—白垩纪界线地层

Effect of Landform and ABL Convergence Line on Local Precipitation in Beijing Areas

北京局地降水中地形和边界层辐合线的作用

Application of Logging Curves to the Mesozoic Stratum Zonation in Jiyang Depression

测井曲线在济阳坳陷中生界地层划分中的应用

A new algorithm for digital mapping of stratum based on control and searching method of vertical and horizontal dividing line

地层数字制图中纵、横分界线控制搜索新算法

ANALYSIS OF METEOROLOGICAL ELEMENT PROFILE IN ATMOSPHERE BOUNDARY LAYER IN SOUTH XINJIANG DESERT HINTERLAND

南疆沙漠腹地大气边界层气象要素廓线分析

Application of Boundary Convergence Line in Nowcasting Warning of Severe Convective Storm

边界层辐合线在局地强风暴临近预警中的应用

CONODONT BIOSTRATIGRAPHY NEAR THE LADINIAN-CARNIAN BOUNDARY INTERVAL IN GUANLING OF GUIZHOU

贵州三叠系拉丁阶-卡尼阶界线层牙形石生物地层

Geochemical Characteristics of Trace Element of Permian-Triassic Boundary Strata in Western Margin of Yangtze Block;

扬子地台西缘二叠—三叠系界线地层微量元素地球化学特征研究

Integrated log response function can be derived from the change rate of logs over boundary.

在地层界面处的曲线变化中提取出测井曲线的综合纵向响应函数。

a line of demarcation between two rock strata.

两个岩层间的分界线

STUDIES ON GRAPTOLITE-BEARING STRATA OF THE CAMBRIAN-ORDOVICIAN BOUNDARY FROM TAOYUAN-CILI,HUNAN PROVINCE

湖南桃源、慈利地区寒武系与奥陶系界线附近含笔石地层研究

THE APPLICATION OF MULTIVARIATE ANALYSIS TO THE STUDY OF LITHOFACIES-PALEOGEOGRAPHY NEAR THE SINIAN-CAMBRIAN BOUNDARY IN THE EASTERN YUNNAN

多元分析在滇东震旦系——寒武系界线地层岩相古地理研究中的应用

FACIES CHANGES AND TRANSVERSE CORRELATION OF THE SINIAN-CAMBRIAN BOUNDARY STRATA IN EASTERN YUNNAN

云南东部震旦系—寒武系界线地层的相变与横向对比

THE BIOSTRATIGRAPHY AND BOUNDARY BETWEEN THE CARBONIFEROUS AND PERMIAN IN SOUTHERN GUIZHOU AND NORTHWESTERN GUANGXI

黔南、桂西北石炭、二叠纪之交的生物地层及其界线