标志层

在无岩性标志层的层段，则根据岩性组合及粒度变化选择标志层。

At the section with non lithology key bed , the key bed could be selected according to the lithology combination and the particle variation .

由于冰期通常具有全球性，同一期含冰山坠石层可作为地层对比的标志层；

The stratum including same period iceberg dropstone can be the key bed for stratigraphic correlation .

嫩二标志层是一套化石层组合，2.5m视电阻率曲线的6个特征尖峰与地层化石含量密切相关。

The N_2 marker bed is a set of fossil assembly . The six peaks of 2.5 meters apparent resistivity is closely related to fossil quantity .

其中最严重的套损剪切面位于标志层所对应的2.5m视电阻率曲线的6个特征峰值中最高的第3个峰值上。

The most serious casing damage sheared at the bedding plane which corresponds to the highest peak of six peaks of 2.5 meters apparent resistivity in N_2 marker bed .

本文以陆地卫星MSS的第五波段图象为基本图象，研究了湖南涟源煤田的构造变形，进而建立了该区12个遥感地层单位的影象特征和三个影象标志层。

The fifth band of MSS is an important image for analyzing structural deformation . Three image marker beds and twelve image features of stratigraphic units of remote sensing are established for interpretation of geological structrue in Lianyuan coal field .

并识别出6个地层对比标志层。

Also , six horizon markers for strata correlation have been identified .

标志层在区域地层研究中的作用

The inessential function of the marker beds at stratigraphy

其中：第二和第九电性层为本区低阻标志层；

The second and ninth electric horizons are low resistivity marker beds in this area .

在两个定义中，岩石时间标志层是关键的，因为它代表着同时沉积。

In both definitions the lithologic-time marker is critical because it represents contemporaneity of deposition .

为了租地和钻井的需求，他们对比了一个或更多的关键标志层。

One or more key marker beds were identified for the purpose of leasing and drilling .

审慎地应用岩性――时间标志层，可以鉴定沙岩体的类型。

Judicial use of the lithologic time marker makes it possible to identify the type of sandstone body .

根据其与时间标志层的关系极易对这两类圈闭进行地下的鉴定与分析。

Both types of traps are identified and analyzed best in the subsurface by relating them to time marker .

该方法首先利用已知井的标志层信息，提取该标志层的小波尺度信息，在该小波尺度信息的基础上得到一个小波尺度序列；

The method first extracts wavelet scale information from known marked beds in wells and forms a wavelet scale sequence .

另外通过对变质岩中条带状磁异常&磁性标志层的分析，还能确定构造性质。

Besides , the characteristics of the structures can be ascertained by analysing the banded magnetic anomaly-the magnetic marker beds-in the metamorphic rocks .

在标志层方面，选择厚度较稳定的泥质灰岩、铝质泥岩作为标志层；

As for the key bed , the muddy limestone and the aluminum mudstone with stable thickness were selected as the key beds .

未钻井前在野外剖面上寻找可能的特征标志层，与钻井剖面进行细致的地层对比，确定标志层后再进行层组划分及小段对比的地层对比方法。

Before drilling , we must find out the characteristic key bed in the field section , correlated in detail with the strata of drilling section .

但其面积（体积）、地层厚度、各标志层的长度在变形前后保持相等，即变形前后的剖面是平衡的。

But the area , bed thickness and marker bed length remain unchanged ; that is to say , the geological section keeps balanced before and after deformation .

应用表明，该技术可以及时监测井眼轨迹在导向标志层和目的层中的钻遇情况，有助于现场实施地质导向钻井。

The application shows that this method can monitor the drilling meet condition in the guide marker and target zone , it is helpful to the field geosteering drilling .

某些砂组内部存在全区稳定分布的标志层，可以作为划分流动单元的一级控制标志。

Some sand group store the whole marker bed that district distribute steadily in , that can regard as the flow first class control sign of unit to divide .

在这种活动型沉积中，组级岩石地层单位岩石组合特征的对比是可行的；同时火山岩（火山事件）的标志层作用亦具有独特作用。

It is feasible to make the rock combination comparison of group level , and the maker beds of volcanic rocks or volcanic events have distinctive effect in researching the active sedimentary .

通过对地质标志层的特征描述并结合测井资料所做的地层对比，进而深入了解了该区煤系地层的横向展布格局。

To provide the description work of the geological markers that can be combined with well-logging correlation to understand and gain insights into the geometry and lateral continuity of the coal seams .

基本层序、标志层在1∶50000区调中的应用及意义&以赣西北三都、修水幅古生界及三叠系地层为例

Application and significance of basic sequences and marker beds to 1 ∶ 50000 regional geological surveying ∶ examples from the Palaeozoic and Triassic strata in the Sandu and Xiushui sheets Northwestern Jiangxi

然后，结合传统的标志层法、煤岩学及古生物学方法，对该区主要煤层进行对比。

Later in the paper , a correlation between the main coal-seams in this province is made , in combination with the traditional method of the key bed , coal petrography and palaeontology .

需用平和与实事求是的态度对待，关键是解决问题。为了租地和钻井的需求，他们对比了一个或更多的关键标志层。

They need to be treated in a stable , factual way with a focus on solving the problem . One or more key marker beds were identified for the purpose of leasing and drilling .

韦州矿区太原组标志层特征及其对比意义辽南、吉南及鲜北早元古界层控铅锌矿床矿石铅同位素特征对比

Weizhou Mine Area Taiyuan Formation Coal-bearing Strata Marker Bed Characteristics and Their Correlation Significance LEAD ISOTOPIC CORRELATION OF PROTEROZOIC STRATA-BOUND LEAD-ZINC DEPOSITS IN SOUTHERN PART OF JILIN AND LIAONING PROVINCES , AND THE NORTHERN PART OF KOREA

取得成果如下：1、根据杜家台油层沉积演化特点及测井响应特征，在曙四区识别了3个标志层和4个辅助标志层，对全区427口井进行进一步统层对比。

According to the sedimentary evolvement of du jia tai reservoir and response of logging , it can be identified 3 main index beds and 4 assistant index beds at Shu 4th section , with 427 wells contrasted .

这些辅助标志层的发现为孤岛油田地层、构造、沉积与油气分布规律等研究奠定了重要基础。研究成果可作为油田开发中后期河流相小层划分对比研究工作的借鉴。

The work lays an important foundation for the study on the stratigraphy , structure , sedimentation and oil distribution and will be used for the substratum division and correlation in the later period of the oil field .

首次利用热释光技术标定了杂色砾岩层为区域同期沉积的标志层，其上部出现的多层凝灰岩具有相似的热释光参数；

For the first time , we make use of thermoluminescence technique to demarcate variegation boulder bed which is the district corresponding period sediment guiding bed , the top appear multilayer ash tuff which have similar thermoluminescence parameter ;

铝土矿与其围岩有较大的电性差异，特别是铝土矿与其标志层奥陶系灰岩侵蚀面的电阻率值相差较大，达数千欧姆米乃至数万欧姆米。

Bauxite ore has rather obvious electric differences with its surrounding rocks , especially between the resistivity value of bauxite and its key bed-Ordovician limestone erosion surface , it can be thousands Ω· m , even to ten of thousands Ω· m.

测井解释的煤层深度、厚度、结构，地质采用率在94.4%以上，测井对划分钻孔岩性，确定物性标志层、断层（点），提供了可靠的基础资料。

Coal seam depth , thickness and structure results from well logging have over 94.4 % rate of utilization by geologists . It provides reliable basic data for borehole lithological division , determination of geophysical property marker horizons and fault ( points ) .