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文章系统分析了陆相生油理论和大庆油田的勘探实践,总结了大庆油田的勘探历程并划分为三大阶段：构造油藏勘探阶段,岩性油藏勘探的探索阶段,岩性油藏勘探大发展阶段。详细阐述了“十五”以来,大庆油田依靠创新理论与技术,丰富完善了大型陆相坳陷盆地岩性油藏勘探理论与配套技术,深层火山岩气藏勘探理论与配套技术,复杂断陷盆地油气勘探理论与配套技术,从而带来了松辽盆地北部中一浅层、深层和海拉尔盆地油气勘探的大发展,大庆油田再次进入油气储量增长高峰期。在详细分析大庆探区的勘探实际和资源潜力的基础上,提出了“百年油田”勘探的工作思路,通过扎实推进科学勘探,努力为油田可持续发展提供有力资源保障的勘探战略。 相似文献
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元谋干热河谷区蒸发量减少原因的灰色关联分析 总被引：7，自引：0，他引：7
张建平 《云南地理环境研究》1994,6(2):68-75
元谋干热河谷区气候炎热干燥、植被稀疏、生态系统脆弱。近２０年来蒸发量明显减少，本文采用灰色系统关联度理论，对各有关因素影响的大小进行了计算和排序。 相似文献
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瞬变电磁法虽然广泛应用于资源勘探和工程勘察中,但仍存在一些亟待解决问题.迫切需要引进一些新的技术与方法,以进一步提高解释精度.由于瞬变电磁资料可以通过数学公式转换成虚拟波;多孔径瞬变电磁物理模拟证明TEM多孔径具有相干性;相邻位置上同一地质体的反射回波具有较好的相关性.所以,对于瞬变电磁资料可以进行多孔径合成成像.本文借助于合成孔径雷达的基本思想,提出一套新的数据处理方法,即采用相关叠加技术,实现多孔径数据合成.在完成瞬变电磁虚拟波提取后,将传统的以剖面为主的处理方式发展成为以测点为中心的多孔径合成,将传统的以单点处理方式发展成为逐点推移多次覆盖的处理方法.采用相关叠加的方法来进行合成孔径,由此大大提高瞬变电磁法的分辨率.从波场的角度拓展和丰富了瞬变电磁场的内涵,使得从实测资料中提取到常规瞬变电磁法提取不到的信息,对地下目标体成像更为有利.通过对所设计模型和实测资料处理,结果表明合成孔径成像效果较好.研究成果为发展瞬变电磁成像技术,提高分辨率提供了一条新途径. 相似文献
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乌泊尔断裂带位于帕米尔构造结东北缘,作为揭示青藏高原形成与演化历史的关键地区之一,为碰撞造山作用提供了详细信息,因此厘清乌泊尔断裂带关键构造的形成演化具有重要意义。为研究该断裂带的几何学与运动学特征,本文利用钻测井资料、二维地震反射资料、DEM 高程资料以及喀什地区1∶100 000地质图,以断层相关褶皱理论为指导,对乌泊尔断裂带进行精细构造解析。研究认为,乌泊尔断裂沿走向至少可分为东、西两段,西段构造变形强烈,而东段较弱,构造样式沿断裂走向上有较大差异;垂直于构造走向上可划分出两个等倾角区;乌泊尔地区的变形最早于中新世早期开始,自上新世以来构造变形强烈,乌泊尔断裂在该区域的活动起始于第四纪,具有幕式活动的特点;通过断层相关褶皱分析得到,自中新世至上新世,断裂东段的构造缩短量至少为9.47 km,第四纪以来的构造缩短量至少为11.65 km。第四系生长地层的内部结构受控于基底叠瓦构造和乌泊尔断裂,明确深浅构造的关系能较好得限定研究区关键构造的形成演化过程,可作为复杂构造解析的有效方法。 相似文献
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矿床受地层及断层双重控制,走向长大于3千米,共圈出V1、V2、V3三条矿体。含矿岩石以透辉石矽卡岩为主,矿石工业类型为硫化铅矿石和氧化铅矿石。矿床成因类型为与花岗岩有关的含矿热液沿破碎带充填-交代形成的矽卡岩型铅矿床。 相似文献
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The hydrogeomorphological method for delimiting flood risk zones in France was developed some twenty years ago. It is based on a simple principle: the outer limits of a stream's flood plain constitute the outer envelope of past floods. These limits are determined with the use of aerial photographs and field surveys of micro-topography as well as analyses of deposit granulometry and colour. Indications of present or past land use (fields, location and distribution of archaeological sites, houses and farm buildings, roads) are also useful. This field-based method long remained ignored, but being reliable, easy to use and inexpensive, it has now been incorporated into the package of methods recommended by French risk-prevention plans (PPRI). The many recent catastrophes that have occurred over the past fifteen years in the Mediterranean regions of southern France demonstrated both the inadequacy of the hydrological–hydraulic method and the reliability of the hydrogeomorphological method, which can, however, be improved by setting observations for the present period against information on the more ancient Holocene evolution of flood plains. To cite this article: J.-L. Ballais et al., C. R. Geoscience 337 (2005). 相似文献
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Hiroyuki MAEDA 《Resource Geology》1998,48(2):105-116
Abstract: Characterization of Neogene magmatism in the Ryuo mine area in the Kitami metallogenic province was carried out on the basis of K-Ar data for felsic–to–mafic terrestrial extrusive and intrusive volcanism from Late Miocene to Early Pliocene. The Ryuo epithermal gold-silver deposit occurs primarily in the felsic volcaniclastic rocks of the Ikutahara Formation and in Ryuo Rhyolite. The Ryuo mineralization age of 7. 7 – 8. 1 Ma coincides well with the hydrothermal alteration age (7. 7 Ma) of Ryuo Rhyolite hosting ore veins. It is concluded that the Ryuo mineralization was essentially accompanied by felsic volcanic activity during the sedimentation of the Ikutahara Formation, and was closely related both temporally and spatially to the intrusive activity of Ryuo Rhyolite. Hydrothermal alteration related to the epithermal gold-silver mineralization of the Ryuo deposit is primarily characterized by early regional and vein-related alterations, and late steam-heated alteration. Early regional alteration consists of a smectite halo (smectite+pyrite±quartz±opal–CT±mordenite°Clinoptilolite–heulandite series mineral). Early vein-related alteration is primarily marked by potassic alteration. This alteration halo can be subdivided into a K-feldspar halo (quartz+adular–ia+pyrite±illite±interstratified illite/smectite±smectite), an illite halo (quartz+illite + chlorite + pyrite ± interstratified illite/smec–tite±smectite) and an interstratified illite/smectite halo (quartz + interstratified illite/smectite+pyrite±smectite). Late steam-heated alteration characterized by kaolinite or alunite locally overprints the early K-feldspar halo. The style of the Ryuo gold-silver deposit is a low-sulfidation epithermal type. The gold–silver–bearing quartz vein precipitates during boiling of ore fluid. The origin of the ore fluid might be meteoric water. The temperature and sulfur fugacity conditions during precipitation of electrum and acanthite are estimated to be 206°– 238°C and 10-13.5 – 10-11.6 atm, respectively. 相似文献
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基于物元分析的登陆台风次数预报 总被引：1，自引：0，他引：1
利用前期的预后因子进行计算，使物元分析具有了预报功能，通过反复调整各因子的等级分界值（经典域和节域）， 可以使登陆台风次数计算等级和实际等级的历史拟合率达到最大，其结果是比较好的，这对沿海地区的防台减灾具有重要的现实意义。 相似文献