查询词典 geologic time

Introduced the geologic background of the Coal-Ge, and the distribution of Germanium in the coal seam.

介绍了胜利煤－锗矿床的地质背景，以及锗在矿层的分布情况。

These five sources comfit for different the surface and geologic task, and have good effect.

这五种震源可适用于不同的地表条件和地质任务，应用效果较好。

And the optimize of underbalance drilling fluid is gone on in view of stratum and reservoir geologic characteristic in DaQing oil field, finally a suit of reverse emulsion drilling fluid system fitting DaQing oil field underbalance drilling is established, and it is successfully used and verified in erbalance drilling construction work, the effect is very ideal. Additional the well control technique and commensurable auxiliary technique of underbalance drilling are also systematically analysed, a suit of auxiliary technique and well control scheme of underbalance drilling fitting DaQing oil field zone of negative pressure is established.

本文重点对欠平衡钻井负压值的影响因素及确定方法进行了研究；并针对大庆油田地层及油藏地质特征进行了欠平衡钻井钻井液体系的优选，最终确定了一套适合大庆油田欠平衡钻井的水包油钻井液体系，并成功地在欠平衡钻井施工中得到应用和验证，效果十分理想；另外，本文对欠平衡钻井的井控技术及相应的配套技术也作了系统的分析，确立了一套适合大庆油田地层特点的欠平衡钻井工艺技术配套措施及适合大庆油田地层负压特点的钻井井控技术方案。

Using the method of convolution model and wave equation numerical simulation, This paper systematically studied several kinds of typical geologic bodies.

4利用褶积模型和波动方程数值模拟方法对几种典型的地质体进行了系统的模拟研究。

Which created a collected core length record with the gravity piston corer in Chinese offshore geologic surveys.

创造了我国海洋地质调查用重力活塞取样器获取岩心的最长记录。

Of or relating to the Cretaceous geologic era.

属于或关于地质上白垩纪的。

Cretaceous period of geologic structure, and creating a unique side of the characteristics of rare stone resources.

白垩纪时期的地质结构，造就了独具一方的特色稀有石材资源。

The paper has studied the strata distributive character and engineering geologic property of bed rock zone of weathering in cryptical coal field, based on large of data form testing and real-field materials, taking importance on the laws of overlying destruction and underground pressure behavior and the mechanism of decreasing protective coal columns while extracting proximity zone of weathering .

以大量实验数据和现场测试资料为依据，研究了隐伏煤田基岩风化带岩体的分布特点及工程地质特性，重点论述了邻近风化带开采的覆岩破坏和矿山压力显现规律以及缩小防护煤柱的机理，为类似矿井的资源回收与安全开采提供了依据。

Through the analyses of condition, the geologic background and the hydrochemistry and the isotope of the carbon and helium of the typical hot springs in the southwest of China, the general rules of the CO2 degasification points in the southwest of china are explored and the CO2 degasification is calculated on the whole.According to the results of wa...

通过对中国西南地区典型温泉的地质背景、环境条件、水化学及碳、氮稳定同位素的分析，探讨了中国西南地区深大断裂出露温泉CO2释放的一般规律，并进行了初步的释放量计算。

Delineation of channels is the first step of geologic evaluation.

勾划河道的轮廓是地质解译的第一步。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。