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层析静校正技术在山地复杂地区三维地震勘探中的应用 总被引：1，自引：0，他引：1
勘探区位于鄂尔多斯聚煤盆地东缘,河东煤田南部,工区内地形起伏较大,黄土冲沟发育,多成“U”字形深切冲沟,部分沟壁可达85°,高差20～60m。地形西低东高,最大高差205m,第四系覆盖层厚度0～120m,低速带速度横向变化较大,存在严重的长、短波长剩余静校正问题。如在该区钻孔CB77至CB73,其2~#煤层底板为同样标高,但在折射静校正后的速度分布图上,钻孔CB73处却存在一明显异常区,通过使用层析静校正方法,很好地解决了这一问题。另外,在该区陷落柱判识方面,利用层析静校正方法取得的时间剖面,其陷落柱边界、高度、形态,比采用常规静校正更清晰。 相似文献
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Tectonic and Hydrocarbon Accumulation Elements Characteristics of the Tethyan Realm in South China 总被引：1，自引：0，他引：1
Abstract: The evolution of the global Tethys Sea can be classified into three stages, Proto-Tethys, Paleo-Tethys and Neo-Tethys. The Tethyan realm has distinctive features of zonations and segmentations along north-south and east-west, respectively, and has variable richness in oil and gas. The petroleum geological conditions of Tethys are complicated, partly represented by multi-layer of source and seal rocks, and reservoirs. The hydrocarbon accumulation elements and periods of the Tethyan realm show gradually younger from west to east and north to south. South China is located in the north belt and Yangtze segment of the Tethyan realm, and its polycyclic tectonic movements were governed by the Tethyan and Pacific realms. The blocks in South China rotated clockwise and counter-clockwise during their drift northward from Gondwana. The belts and segmentations of Tethys in South China are also clear, with six tectonic belts including: Chuxiong-Sichuan; middle Guizhou-Hunan-Hubei; lower Yangtze; Xuefeng-Jiangnan; Guangxi-Hunan-Jiangxi; and Cathaysia. Numerous faults, including compressional, compressional-shear, extensional, extensional-shear and shear are well developed in South China. The fault strikes are mainly NE, NW and NS, in which the NE is the dominant direction. Lower, middle and upper hydrocarbon assemblages, respectively corresponding to Proto-, Paleo- and Neo-Tethys, formed in the Tethyan realm of South China with the lower and middle having excellent hydrocarbon accumulation conditions. An integrated analysis of tectonic evolution, superimposed deformation and later hydrocarbon preservation shows that during the Neo-Tethyan stage in South China, continental sediments were deposited and experienced intense tectonic deformation, which had resulted in different hydrocarbon pool-forming features from those of the Neo-Tethyan realm. 相似文献
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川西龙门山褶皱冲断带分带性变形特征 总被引：41，自引：5，他引：36
通过野外地质考察和地震资料解释,将龙门山褶皱冲断带划分为5个构造带,即青川-茂汶断裂以西为松潘-甘孜构造带,青川-茂汶断裂与北川-映秀断裂之间为韧性变形带,北川-映秀断裂与马角坝-通济场-双石断裂之间为基底卷入冲断带,马角坝-通济场-双石断裂与广元-关口-大邑断裂之间为前缘-褶皱冲断带,广元-关口-大邑断裂以东为前陆坳陷带,在构造变形特征上,各条断裂在演化上具有前展式特征,在松潘-甘孜构造带和韧性变形带构造变形强烈,形成推覆构造带等构造变形样式,在前缘-褶皱冲断带和前陆坳陷带,变形强度较弱,形成背冲断块或断层相关褶皱等构造,西北部区域的变形表现为塑性变形特征,向南东方向渐变为塑-脆性变形和脆性变形,在剖面上各条断裂所形成的深度向盆地方向逐渐递减。龙门山褶皱冲断带的分带性变形特征是由多种因素共同影响的结果,这些因素主要有板块构造背景的决定作用、多套滑脱层的控制作用和岩性因素的制约作用。 相似文献
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对比研究了台湾海峡西岸福建沿海北东向龙海角美 -白云山断裂、台湾海峡北东向平潭牛山岛 -东山兄弟屿断裂和台湾海峡东岸台湾岛北东向中央山脉等断裂晚更新世以来的活动性及其与地震的关系。结果表明 ,作为欧亚大陆板块与太平洋菲律宾海板块的边界断裂之一的中央山脉断裂第四纪以来乃至现今仍具有强烈的活动 ,因而发生了 4次M≥ 7地震 ;作为台湾海峡沉降带与福建武夷 -戴云复式隆起的边界断裂的平潭牛山岛 -东山兄弟屿断裂全新世晚期 (2 5 0 0a以来 )仍具有强烈的活动 ,从而发生了 3次M≥ 7地震 ;作为北东向长乐 -诏安断裂带西界断裂组成部分的龙海角美 -白云山断裂晚更新世期间具有强烈的活动 ,因而发生了 5次M =5～ 6 地震 相似文献
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营口—宽甸地区重力场自北而南有逐渐增高的总趋势。中部区重力低与重力高呈带状相间出现。结合该区已知的地质构造特征综合分析,重力负值带是早元古宙拗拉槽边界深断裂和构造—岩浆岩带的反映。隐伏、半隐伏花岗岩体的解释和推断,为逃一步寻找金、硼、铅锌等矿产提供了信息。 相似文献
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Petroleum exploration potential of Tamtsag Basin 总被引：1，自引：0，他引：1
SUNGuo-qing GUOQing-xia ZHANGYa-jin ZHAOHong-wen 《东北亚地学研究》2004,7(1):36-45
The Tamtsag Basin is located in the extreme eastern portion of the Mongolia. The Basin and its counterpart in China (the Hailar Basin) are united a whole basin on the structural setting. In recent years,the Tamtsag Basin attracts more and more attention with the important exploration discovered in the 19^th block by SOCO and in Hailar Basin of China. This paper discusses the exploration potential of Tamtsag Basin from the viewpoint of petroleum geology. 相似文献
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SUN Haitao ZHONG Dakang ZHANG Simeng WANG Xingming.State Key Lab of Petroleum Resource Prospecting Faculty of Natural Resource Information Technology China University of Petroleum Beijing China.Exploration Development Research Institute of Dagang Oilfield Company PetroChina Tianjin China 《东北亚地学研究》2010,(1)
There are eighty sedimentary basins in five different types in African continent,i.e.craton sag basin,foreland basin,intermountain basin,passive margin basin and rift basin,which underwent the stress environment of stable depression-compression-extension.The first three types of basins had been intensely influenced by Hercynian and Alpine tectonic movement,while the later two types of basins always exist in a stable extension environment.Different basin evolution caused the obviously hydrocarbon distributio... 相似文献
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Differential Tectonic Deformation of the Longmen Mountain Thrust Belt,Western Sichuan Basin,China 总被引：1，自引：1，他引：0
TANG Liangjie YANG Keming JIN Wenzheng WAN Guimei L Zhizhou YU Yixin State Key Laboratory of Petroleum Resource Prospecting Beijing China Key Laboratory for Hydrocarbon Accumulation Mechanism China University of Petroleum Ministry of Education China Basin Reservoir Research Center. China University of Petroleum China Southwest Branch Company SINOPEC Chengdu Sichuan China 《《地质学报》英文版》2009,83(1)
Field investigation and seismic section explanation showed that the Longmen Mountain Thrust Belt has obvious differential deformation:zonation,segmentation and stratification.Zonation means that,from NW to NE,the Longmen Mountain Thrust Belt can be divided into the Songpan- Garz(?) Tectonic Belt,ductile deformation belt,base involved thrust belt,frontal fold-thrust belt,and foreland depression.Segmentation means that it can be divided into five segments from north to south: the northern segment,the Anxia... 相似文献