努力提高三维地震勘探精度，为西部煤炭工业做出新贡献     

孙升林 《中国煤炭地质》2008,(6):1-5

以国家重大产业技术开发专项“西部煤炭资源高精度三维地震勘探技术”项目的由来、意义和总体研究目标为引,概括的介绍了项目依托工程中各个专项技术研究完成情况,并对非均匀介质成像技术、高精度三维地震静校正技术、高密度采集技术、特观技术、岩性反演技术、属性体解释技术等六项重大关键技术取得的突破性进展进行了重点说明。指出随着我国煤炭生产重点的逐步西移,应加强诸如叠前、叠后深度偏移技术的研究,以解决复杂山区三维地震面元内地震反射波散射问题,提高其三维地震勘探精度,为西部煤炭工业做出新贡献!  相似文献   

三维地震技术在煤层顶板稳定性研究中的应用     

孙立新  许崇宝  王真 《中国煤炭地质》2008,(11):55-57

龙固井田为全隐蔽的华北型煤田,位于巨野煤田中部,其首采扩大区主采煤层为3号煤层。考虑3煤层顶板稳定性主要受其顶板的构造信息和岩性信息影响,因此首先依据三维地震勘探综合解释成果及波阻抗反演解释成果对二者进行定量化,然后对波阻抗数据进行归一化处理,使得波阻抗数据和量化后的构造数据具有相同的变化范围及等量贡献。在此距离范围内构造和岩性的权值各为0．5,依此生成综合因素煤层顶板稳定性隶属度。分析3煤层顶板以上10m、20m处的综合因素煤层顶板稳定性隶属度图可以发现,该区3煤层顶板稳定性比较好。且其稳定性主要是受构造因素控制,岩性因素相对影响较小。  相似文献   

DS600和MAX6612在温度传感器中的试验应用     

孙海霞  李海亮 《地壳构造与地壳应力文集》2008,(0)

DS600和MAX6612是MAX(美国美信公司)新出的两款模拟温度传感器产品。这两款芯片在性能上各有其优越性,本文主要就其特征、参数、结构、功能等分别进行了研究,并结合实践情况进行了试验和应用。  相似文献   

SOMATOM AR.C型CT机复位故障检修     

孙璐  童双立 《CT理论与应用研究》1996,5(1):30-32

本文介绍了由电源故障引起的不可逆转故障,并讨论了维修和故障的排除。  相似文献   

Planetary boundary layer and surface layer sensitivity to land surface parameters   总被引：1，自引：1，他引：0  

Wen-Yih Sun  Michael G. Bosilovich 《Boundary-Layer Meteorology》1996,77(3-4):353-378

The sensitivity of the development of the convective planetary boundary layer (PBL) and the surface layer are examined using a coupled surface parameterization and detailed PBL model. First, the coupling is verified against observations from the First ISLSCP (International Satellite Land Surface Climatology Project) Field Experiment (FIFE). Results of the sensitivity experiments indicate that the PBL is most sensitive to the amount of soil water content, and the proximity of the soil water content to critical soil texture values (field capacity and wilting point). While vegetation cover is not the most sensitive parameter at the surface, its influence on the surface energy and hydrologic balance is crucial. Model sensitivity to minimum stomatal resistance, type of soil parameterization and canopy height (surface roughness and displacement depth) is also discussed.  相似文献   

普里兹湾邻近海域大磷虾的生殖特点研究          下载免费PDF全文

王荣  张云波  仲学锋  孙松  柳满然 《极地研究》1993,5(4):12-21

本文依据 1 989/1 990和 1 990 /1 991夏季 ,“极地”号考察船在普里兹湾邻近海域 (南大洋的印度洋区 )的拖网样品 ,对大磷虾的性腺发育和生殖群体的年龄结构等 ,进行了分析研究。大磷虾的生殖开始于 1月 ,一直持续到 3月。高峰期出现在 2月中旬 ,比大西洋区相比迟了一个月。生殖群体主要包括两个年龄组 ,即 3 + 龄和 4+ 龄。换句话说 ,绝大部分个体是三年性成熟 ,一生可生殖两次 ,不排除少数个体两年性成熟 ,或第三次性成熟的可能 ,但比例非常小。在 5 91 6尾能区分性别的个体中 ,雄性个体只占 3 4 .1 %。雄性比随体长的增加而降低。体长大于 5 0 mm的个体中雄性仅占 2 2 .9%。  相似文献   

山东省德州市“中华碘泉”矿泉水的发现与开发     

曹钦臣  赵广涛 《高校地质学报》1995,1(1):97-100

在山东省德州市首次探明国内稀有含碘饮用用天然矿泉水－－“中华碘泉”,研究表明,矿泉水是在新生代断陷盆地的构造背景和弱碱氧化的水文地球化学环境条件下,地下水与含水介南长期水－岩反应中经溶滤形成的,矿泉水水量丰富,水质优良,为含碘水苏打型矿泉水,但氟含量偏讥;为合理开发这一富足资源,可选用电渗析,倾析方法降低氟含量,并将其作为规模化含碘矿泉水生产的技术工艺。  相似文献   

矿物标型六性及其在胶东金矿中的应用   总被引：2，自引：0，他引：2  

陈光远  孙岱生 《吉林地质》1990,9(3):1-8

目前矿物标型研究和应用已进入一个新的阶段。作者从哲学的高度,把国内外矿物标型特征的分散研究加以集中概括和总结,提出了“矿物标型六性”的普遍规律,即普遍性、特殊性、变化性、相应性、继承性和分带性,对矿物标型特征研究具重要的指导意义。这些规律在胶东金矿中得到广泛应用,并已取得良好效果。  相似文献   

Are the South and North Liaohe Groups of North China Craton different exotic terranes? Nd isotope constraints   总被引：29，自引：1，他引：29  

Sanzhong Li  Guochun Zhao  Min Sun  Zongzhu Han  Guangtao Zhao  Defeng Hao 《Gondwana Research》2006,9(1-2):198

The Liaohe Group is an important Paleoproterozoic stratigraphic unit in the northeastern part of the North China Craton and is traditionally subdivided into the North and South Liaohe Groups. Associated with both the North and South Liaohe Groups are voluminous Paleoproterozoic granitoid rocks, named the Liaoji granitoids. Different tectonic models, including terrane amalgamation, continent–arc collision and rift closure, have been proposed to interpret the tectonic setting and evolution of the North and South Liaohe Groups and associated Liaoji granitoids. At the centre of the controversy between these models is whether or not the North and South Liaohe Groups developed on the same Archean basement. Nd isotopic geochemistry of the Liaoji granitoids provides important constraints on this controversial issue. The Liaoji granitoids associated with the North and South Liaohe Groups display similar ε_Nd values, restricted to a narrow range from 0 to 2, implying that these granitoid rocks were derived from the same or a similar magma source. Moreover, the Liaoji granitoids associated with the North and South Liaohe Groups have similar Nd model ages (T_DM), ranging from 2.4 to 2.6 Ga, suggesting that the protoliths of the Liaoji granitoids associated with both groups may have formed simultaneously, and that the basement rocks underneath the Liaoji granitoids and associated North and South Liaohe Groups belong to the same continental block rather than two different blocks. Combining lithological, structural and geochronological considerations, we interpret the North and South Liaohe Groups as having developed on a single late Archean basement that underwent Paleoproterozoic rifting associated with the intrusion of the Liaoji granitoids and the formation of the Liaohe Group, and closed upon itself in the Paleoproterozoic.  相似文献   

Water–rock interaction during the process of steam stimulation exploitation of viscous crude oil in Liaohe Shuguang Oil Field, Liaoning, China     

Qian Hui  Yang Zhenghua  Li Yunfeng  Xu Wancai  Sun Yaqiao 《Environmental Geology》2006,50(2):229-236

In the process of steam stimulation exploitation of viscous crude oil, the injected water, at high temperature and under high pressure, reacts intensively with the host rock. This kind of water–rock interaction in Liaohe Shuguang Oil Field was studied on the basis of analysis of water composition changes, laboratory experiments, mineral saturation indices analysis, and mass balance calculation. Compared with the injected water, the changes of the composition of discharged water are mainly the distinct decrease of pH, Na⁺, SiO₂ and Cl⁻, as well as the increase of K⁺, Ca²⁺, Mg²⁺, SO ₄ ²⁻ and HCO ₃ ⁻ . Laboratory experiments under field conditions showed: the dissolution sequence of minerals quantitatively is quartz>potassium feldspar>albite, and the main change of clay minerals is the conversion of kaolinite to analcime. Mass balance calculation indicated during the process of steam stimulation, large quantities of analcime are precipitated with the dissolution of large amounts of quartz, kaolinite, potassium feldspar, and CO₂. These results correlated very well with the experimental results. The calculated results of Liaohe Shuguang Oil Field showed that during the steam stimulation for viscous crude oil, the amounts of minerals dissolved (precipitated) are huge. To control the clogging of pore spaces of oil reservoirs, increased study of water–rock interaction is needed.  相似文献