共查询到20条相似文献，搜索用时 890 毫秒
1.
2.
松辽盆地油气无机成因与勘探方向 总被引：5，自引：1，他引：4
松辽盆地中浅层沉积层勘探已接近饱和,随着油气勘探向深层进军,油气无机成因研究在勘探实践中日益重要。徐家围子深层天然气为典型的无机成因天然气。松辽盆地三肇地区扶、杨油层原油“上生下储”模式的否定,为寻找深部油源提供了可靠的事实依据。古潜山油气藏“新生古储”和“侧向运移”模式的否定,为基岩油气藏无机成因提供了可靠的证据。松辽盆地无机成因油气藏研究需要得到有力的支持和保证,因为基岩油气藏勘探是松辽盆地今后首选勘探目标。 相似文献
3.
4.
5.
6.
勘探证实,松辽盆地北部西部斜坡区已发现的富拉尔基油田、江桥油田、二站-阿拉新油气田、白音诺勒油气田和平洋油气田超出有效烃源岩的展布范围,距离生油凹陷30～100km,成藏要素一直是制约该区油气勘探的核心问题。本文以构造地质学、沉积地质学和石油地质学等理论为指导,开展了松辽盆地北部西部斜坡区构造特征、沉积特征、典型油气藏解剖研究。深入剖析了研究区油气成藏的主控因素,表明已发现的油气主要富集在四个鼻状构造带和超覆带上,储集砂体为三角洲前缘的分流河道砂体、河口坝、远砂坝和席状砂,指出该区油气成藏和富集程度受构造和沉积砂体类型双重控制。典型油气藏解剖表明,该区油气藏类型丰富,主要发育微幅度构造油藏、岩性-构造油藏、构造-岩性及岩性上倾尖灭等油气藏类型。结合构造、断裂、沉积及油气运移等因素,建立了研究区油气成藏模式,指出不整合面、断层和砂体是油气输导通道,为今后该区油气勘探指明了方向。 相似文献
7.
松辽盆地西部斜坡带烃类微渗漏遥感信息提取 总被引：5，自引：1，他引：5
陈圣波 《吉林大学学报(地球科学版)》2002,32(2):155-157
松辽盆地西部斜坡带位于吉林省西部白城地区。20多口探井证实，油气显示主要集中在东北部套保地区，油气显示最井是洮13井，其次为洮5井和洮5井和洮6井。烃类微渗漏遥感直接探测技术是一种直接找油方法，是90年代以来发展的一种新方法，目前已被国内外石油勘探部门广泛应用。通过对液态、气态、固态石油物质光谱特性的分析，采用比值处理，加TM4／TM7、TM4／TM5、TM4／TM3来增强微弱的烃类微渗漏异常；并将波段的比值或原波段进行彩色合成提取了研究区烃类微渗漏异常，其结果与已知钻孔的含油气情况一一对应，同时在研究区西部角发现一些新的油气渗漏异常区，可作为研究区油气勘探进一步工作的优先靶区，对研究区的油气勘探有较好的指导意义。 相似文献
8.
松辽盆地西南隆起区发现晚白垩世嫩江组叶肢介化石 总被引：1，自引：0，他引：1
松辽盆地西南隆起区高力板镇西南首次发现晚白垩世叶肢介化石4属6种，包括：Estherites（Euestherites）cf.pulcherrimus Zhang et Chen、Estherites（Euestherites）sp.、Estherites sp.、Halysestheria biformis Zhang et Chen、Glyptostracus sp.、Dictyestheria sp.，确定这套地层为嫩江组.该地区嫩江组的发现，为建立松辽盆地西南隆起区地层系列奠定了基础，为下一步开展松辽盆地油气地质调查研究提供了有力支撑. 相似文献
9.
10.
经过研究发现，油气化探在松辽盆地东南隆起区具有较好的应用效果，烃类和蚀变碳酸盐法是该地区比较有效的方法。地球化学测量结果表明，十屋南地区烃类比较活跃和富集，这对在该地区利用地球化学技术寻找油气藏是个有利的前提条件。通过研究，在测区内发现了一些油气化探综合异常，这些综合异常的存在，客观地反映了研究区内具有成油气藏条件。 相似文献
11.
Kevin Burke 《Tectonophysics》1976,36(1-3)
Well over one hundred separate graben formed in association with ocean opening can be recognized around the shores of the Atlantic Ocean. The graben are linked forming an elaborate network of triple-rift systems. Some rifts developed to form ocean but many failed. The stratigraphie and structural history of these rift structures is varied and helps to illuminate the processes that operate at continental rupture. Rifting has been commonly accompanied by basaltic vulcanism and rapid accumulation of several kilometers of sediment. Horsts within the graben strongly influence early sediment distribution. Generally, rift faulting ceases about the time of onset of normal marine sedimentation but there are a few exceptions and some graben formed at ocean opening have influenced sediment distribution more than 100 m.y. later. Although tensional structures predominate strike-slip and compressional structures have developed locally in the graben. The rivers bringing the largest amounts of sediment into the Atlantic during the last 150 m.y. have prograded along failed rift arms formed at continental rupture. In some cases their deltas have come to lie on oceanic crust. 相似文献
12.
13.
14.
Many continental basins were formed when the most of the South Mongolian territoty is modulated to continents from Late Carboniferous (Tectonic map of Mongolia, 1978). One of these basins is Noyon-Gurvantes continental sedimentary basin (NGCB). (Fig. 1)
NGCB comprises on the territory Gurvantes and Noyon sums of Umnugovi aimag (province), which are Noyon mountain range, its mountain side, foot of the mountain, Nariinsukhait and Argun hills geographically. The purpose of our study was to determine the geological age of coal bearing sediments of the coal mines near or at Nariin Sukhait, and to study their structure and moreover enhance the chance to discover new deposits. 相似文献
15.
西藏许如错地区在国内鲜有学者研究,仅在少有的区域地质报告中出现。研究区内发育一套古近系碎屑岩沉积——日贡拉组,该地层在研究区局部具有一套火山岩夹层。文章通过对许如错地区古近系日贡拉组碎屑锆石的LA-ICP-MS U-Pb测年分析,结合周边盆地年龄结构及研究区沉积现象,进而追寻盆地沉积物物源和盆地充填记录。研究表明,日贡拉组为一套由粗变细最终又变粗的碎屑岩沉积夹少量火山岩,根据沉积原生构造和宏观剖面判断其主要是扇三角洲-浅湖相-扇三角洲的沉积环境;岩浆成因的碎屑锆石年龄峰值集中在127～134 Ma年龄段内,结合周缘年龄推断日贡拉组物源来自北—北西中部拉萨地块的早白垩世花岗岩。通过对研究区日贡拉组岩石组合、岩石地层序列、物源分析、沉积演化过程以及年代证据等方面的研究,发现日贡拉组的发育处于青藏高原俯冲碰撞隆升阶段和汇聚挤压隆升阶段。 相似文献
16.
Acta Geochimica - Surface radioactive survey has been carried with portable gamma ray spectrometer (PGRS) about the 45 km2 around the Srisailam sub basin, the surface radioactive anomalies... 相似文献
17.
以松辽盆地和桦甸盆地为例,对盆地中富有机质泥岩进行系统测试。分析表明,富有机质泥岩中含油率和TOC、气体损失率呈明显的正相关; 而与半焦、密度呈负相关; 与全水的相关性不明显。结合相关研究表明,松辽盆地富有机质泥岩中有机质主要来自湖泊自身生产物,沉积速率较慢,且成岩作用相对较强,此盆地油页岩适合低温干馏炼油,因干馏后半焦中残留有机质较少,适合烧砖、制作水泥等。桦甸盆地油页岩有机质为湖泊生物和陆源有机质共同来源,沉积速率相对较快,成岩作用较弱,此盆地油页岩适合低温干馏炼油,干馏后半焦中残留有机质较多,适合发电和烧砖等,损失气体可以回收进行瓦斯发电。 相似文献
18.
通过楚雄盆地与四川盆地中西部区域地质条件和油气地质条件的对比研究,探讨了楚雄盆地与四川盆地中西部地区盆地性质、沉积序列、油气地质条件等方面的异同点,从而给楚雄盆地的油气勘探一些启示：它们间的基本地质特征、油气地质特征类似,且上三叠统地层为主要的烃源岩和自生自储组合,侏罗系储层也具有低孔、低渗、高含水饱和度、非均质性强的特征,裂缝对油气的富集、高产起到了重要作用。认为：加强砂体的展布、连通性研究,裂缝、断层性质、形态、沟通性、规模等研究,在有白垩系、第三系覆盖区完全有可能进行油气勘探。 相似文献
19.
The Ruhr coal basin is part of the external fold and thrust belt of the Variscan orogen in Central Europe. Information from extensive coal mining, outcrops in the south of the Ruhr district, reflection seismic surveys and about 800 exploration boreholes in the north, support the interpretation of a mostly molasse-type sequence, more than 6000 m thick, of Namurian and Westphalian age. Both the southwest-northeast trending sedimentary basin structures and the fold structures of the Ruhr Carboniferous were caused by the compressive regime of the Variscan folding in its hinterland, but there is no direct relationship between sedimentary basin structures and the later folding structures. Coal formation started in the Namurian C, reached its maximum during the Westphalian A and B and ended during the Westphalian D. In total, about 250 coal seams were formed, but only 50 of them are of economic importance at present.Strata thicknesses and coal content are generally greater in the southeast of the Ruhr coalfield than in the northwest. An important exception can be observed in the lower part of the Westphalian A, where, in contrast, strata thicknesses are greatest in the northwest (in the Münsterland region), although the coal content remains the greatest in the southeast.Detailed isopach maps covering 100–200 m thick stratigraphic intervals reveal the existence of a southwest-northeast trending zone of reduced subsidence in the Ruhr coalfield that moved from southwest-northeast during the Westphalian. This structure can be interpreted as a peripheral bulge. Coal seems are purer and thicker in the area of this structure, which therefore must have been a paleogeographic element within the Ruhr basin.The general effect of a general decrease in the coal content of the Upper Carboniferous towards the northwest is superimposed on the migration of the coal content maxima of individual formations towards the northwest. During the Namurian C and Westphalian A the coal content maxima were situated in the area of the River Ruhr and during the Westphalian B and C in the area of the River Lippe.The deformation of the Ruhr coal basin is of post-Westphalian age, as demonstrated by the concordant folding of the Devonian and Carboniferous strata. The tectonic structure is mainly characterised by the following elements: stockwerk tectonics, axial elevations and a succession of compressional and extensional tectonics.Due to the general dip of the Ruhr coal basin towards the north, different structural levels (“stockwerks”) can be observed. The southern area displays the lowermost stockwerk, with many minor folds of about constant wavelength and low amplitudes. Thrusts are mainly small and some of them show increasing displacement upwards. The central part of the mining area displays the intermediate stockwerk with large, tight anticlinoria with minor folds separated by open synclines. These are accompanied by folded northwest- and southeast-vergent thrusts. In the northern Ruhr district, high anticlines and broad, trough-shaped synclinoria with only few thrusts represent the uppermost stockwerk. Large fold controlled thrusts die out at this level. Axial culminations and depressions have strongly influenced the structural style of the folding as well.According to this model of stockwerk tectonics, excess volume created by disharmonic folding is redistributed by thrusts. Thrusts dying out downwards at different stratigraphic and structural levels give evidence that there is no regional basal detachment below the Ruhr coal basin. This interpretation fits very well to new results achieved by the deep seismic reflection profile DEKORP 2-N. The section clearly shows thick-skinned tectonics in the Rhenish massif, with a shortening of the whole thickness of crust. The Ruhr coal basin can, therefore, be interpreted in terms of an autochthonous foreland basin in front of a buried thrust front to the south.Investigations on the post-Carboniferous strata of the Ruhr basin indicate different periods of active faulting. Cross and diagonal faults were formed partly at the end of the Variscan folding and partly before and during deposition of the Zechstein strata. A further important period of tectonic movements occurred during the early Kimmerian phase in the Late Triassic. Furthermore, earlier extensional faults in the Ruhr basin have been affected by Late Cretaceous transpression. 相似文献