汞元素的石油地质意义     

李广之  袁子艳  庄原  江浩 《物探与化探》2008,32(2):143-146,185

油气中都含有汞元素组分,汞的物理化学性质决定其可以从油气藏中向上垂向运移,根据采样介质类型及样品预处理的手段不同,地表中汞的分析方法可分为壤气、热释汞及土壤总汞分析方法。壤气汞、热释汞及土壤总汞指标都有着很好的示油气意义,同时也有着示断裂带的地质意义。  相似文献   

Chebyshev逼近滤波器在位场分离中的应用   总被引：1，自引：0，他引：1  

蒋甫玉  孟令顺  张凤旭  高丽坤 《物探与化探》2008,32(3):311-315

在对经典FIR数字滤波器的设计方法进行研究的基础上,提出了一种可以用于位场分离的基于Chebyshev最佳一致逼近原理的FIR滤波器的设计方法。在理论模型实验中,采用基于Hanning窗的低通滤波器计算出的区域异常最大误差为6.266×10^-6 m/s² ,均方差为2.115×10^-6 m/s² ,最大百分比误差为22.2%,而且计算点在±9 km以外的误差均大于10.1%。而利用最佳一致逼近原理分离出的区域场和局部场与理论异常值拟合得较好,曲线基本重合。分离出的区域异常最大误差为3.101×10^-6 m/s² ,均方差为0.989×10^-6 m/s² ,最大百分比误差仅在边部的几个数据上,为7.76%,其余各点的误差均小于4.1%。实例检验中将该方法用于孙吴—嘉荫剖面布格重力异常场的分离,分离出的区域场中局部场残留少,分离彻底,效果较为理想。  相似文献   

东濮凹陷桥口构造沙三段储层成岩作用与孔隙演化     

蒋庆平  李德敏  罗洋  王刚 《新疆地质》2008,26(4)

通过薄片观察、鉴定可知,桥口地区沙河街三段储集层砂岩成岩作用主要有压实作用、胶结作用、交代作用和溶蚀作用．孔隙以粒间溶孔、粒内溶孔和胶结物溶孔等次生溶孔为主．经粘土矿物X衍射分析,将成岩阶段划分为早成岩A、B期和晚成岩A1、A2、B期,早成岩A、B期的机械压实和胶结作用使原生孔隙大量丧失,晚成岩A1溶蚀作用对储层孔隙起重要改善作用,增加大量次生孔隙,晚成岩A2、B期方解石胶结物的胶结作用使砂岩次生孔隙大量减少．因此早期原牛孔隙的大量散失、晚期胶结作用使次生孔隙大量减少是造成本区砂岩低孔、低渗的主要原因．  相似文献   

Origin of Oils in “Subtle pools” in the Dongying Depression, Bohai Bay Basin, China     

Li Sumei  Jiang Zhengxue  Liu Keyu  Qiu Guiqiang  Gao Yongjin 《《地质学报》英文版》2008,82(1):184-196

Subtle traps or oil pools have become an important exploration play in the Dongying Depression, Bohai Bay Basin, east China. Despite recent successes in exploration, the formation mechanisms of subtle traps are still not well understood. The majority of subtle oil pools in the Dongying Depression are developed in the middle interval of the Es3 Member of the Paleogene Shahejie Formation with the subtle traps being primarily of lenticular basin-floor turbidite sands encompassed in mudstones. Oil in the subtle traps was previously thought to have migrated directly from the surrounding source rocks of the same formation （Es3）. Detailed geochemical investigation of 41 oils and 41 rock samples from the depression now indicates that the oils from the subtle traps cannot be correlated well with the surrounding Es3 source rocks, which are characterized by high Pr/ Ph （〉1）, low Gammacerane/C30hopane, representing a freshwater lacustrine setting. In contrast the oils features low Pr/Ph （〈1） and relatively high Gammacerane content, showing a genetic affinity with the underlying Es4 source rocks, which also have the same qualities, indicating a brackish lacustrine setting. Oils in the Es3 subtle traps are probably derived from mixed sources with the contribution from the upper Es4 source rocks predominating. Therefore unconventional oil migration and accumulation mechanisms need to be invoked to explain the pooling of oils from the ES4 source rocks, which probably came through a thick low interval of the Es3 source rocks with no apparent structural or stratigraphic pathways. We suggest that the subtle oil migration pathway probably plays an important role here. This finding may have significant implications for future exploration and the remaining resource evaluation in the Dongying Depression.  相似文献   

Distribution Characteristics of Sulfur and the Main Harmful Trace Elements in China’s Coal     

TANG Shuheng  SUN Shenglin  QIN Yong  JIANG Yaof  WANG Wenfeng 《《地质学报》英文版》2008,82(3):722-730

To promote the rational development and use of clean coal resources in China, data on the regional and age distribution of sulfur, arsenic and other harmful elements in Chinese coal was broadly collected, tested for content, and analyzed. Coal in northwestern China is characterized by low to extremely low levels of sulfur; the coal of the Taiyuan Formation in northern China mainly has high-sulfur content; that of the Shanxi Formation is mainly characterized by low sulfur coal; and the Late Permian coal in southern China has overall higher sulfur content; other regions have low sulfur coal. The average content of harmful trace elements in the bulk of China＇s coal is similar to the corresponding content in the coal of the North America and the rest of the world, whereas the content of various elements （Hg, Sb and Se） is different in magnitude to the corresponding percentage in the crust. The average content of the elements Cr, Se, Co, Be, U, Br in Late Permian coal in S China ranks first in the country whereas the average content of Hg and CI in the coals of Late Carboniferous to Early Permian age in N China are the highest. The average content of Mn in Early and Middle Jurassic coal is higher in NW China. The high content of harmful elements in some coal should cause particular concern both in the development and utilization of coal.  相似文献   

基于AHP和BP神经网络的深部地热水可持续开发能力评价   总被引：1，自引：0，他引：1  

张娟娟  林建旺  林黎  田光辉 《地下水》2008,30(6):46-48

采用资料完整性、开采潜力、回灌量、平均水压下降速率、地面沉降速率、水温、水质、地热井布局8项指标构建天津地热可持续开发能力评价指标体系;运用层次分析法确定了各项指标的权重,建立起评价因素集和评语集,给出了归一化数值;建立了天津地热可持续开发能力的BP神经网络模型,以层次分析法得出的结果作为样本,对BP网络进行了训练和测试,实例评价结果表明了AHP和BP神经网络方法的可行性,为地热资源的可持续开发能力评价提供了一种新的评价方法。  相似文献   

多源遥感数据综合解译鄂尔多斯盆地杭锦旗地区地质构造   总被引：1，自引：0，他引：1  

颜蕊  张景发  姜文亮  焦孟梅 《国土资源遥感》2008,(2):88-92

利用多源遥感数据假彩色合成、融合及纹理分析等增强处理方法提取研究区构造信息,进而对研究区进行综合解译;通过分析水系、色调、纹理、地貌及岩性等特征,判断出杭锦旗地区存在一小一大、内外相套的2个环形构造,发育的北西向、北东向2组共轭断层和一组北北西向断层,与环形构造相互构架,构成研究区特殊的构造体系。经分析预测,这些构造是受周边南北向构造应力共同挤压而形成。  相似文献   

海底基岩高程测量中浅地层剖面仪数据处理方法研究   总被引：1，自引：0，他引：1  

姜小俊  胡建炯  史永忠 《测绘科学》2008,33(5)

本文从浅地层剖面仪在海洋地球物理探测中的应用为出发点,介绍了浅地层剖面仪采集数据的构成后,提出了一种基于ESRI公司ArcGIS平台数据处理方法,并结合某跨海大桥工程桥墩附近基岩高程测量的实例,证明了该方法的快速、有效性,最后提出了对于浅地层剖面数据处理方法的结论与展望。  相似文献   

丽江市地质灾害易发性遥感影像判译   总被引：2，自引：0，他引：2  

JIANG Qin  杨世瑜 《云南地质》2008,27(1):114-119

丽江市地质灾害多发,在滇西北旅游城市中较典型。应用遥感技术对丽江市地质灾害易发性的遥感研究,可突破传统方法,发挥宏观、综合、直观、快速特点,取得较好效果。  相似文献   

Simple Analysis on Some Dynamic Characteristics of Exploitation and Utilization of the Terrestrial Resources     

TIAN Guang-hui  ZENG Mei-xiang  RUAN Chuan-xia 《地下水》2008,30(5)

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