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通过对衰减方程进行求导,然后再积分的方法,推导得到了衰减方程参数之间的关系:6=dc。由此提出了一种求解方程参数的新方法。该方法克服了传统采用近似法确定衰减方程参数的不足,具有简单、方便、快速、精确的特点。经实际算例验证表明,方法是有效、可靠的,易于被油气藏工作者掌握和使用。 相似文献
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利用酯化反应和聚合反应合成各种不同化学结构的PMA降凝剂小样,考察了在各种基础油中的降凝效果,重点探讨了PMA降凝剂的分子量和酯基侧链碳数分布等化学结构对降凝效果的影响,对提高我国PMA降凝剂的技术水平具有一定现实意义。 相似文献
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南京地区金子运动与黄马青群底部石灰岩质角砾岩的成因 总被引:3,自引:0,他引:3
1935年朱森[1]等研究宁镇山脉地质时,首先提出中三叠世末期这里发生过重要的地壳运动,称金子运动,上三叠统黄马青群底部有石灰岩质角砾岩不整合在下中三叠统青龙群之上。1945年喻德渊[2]研究了安庆地区的同一地壳运动,黄马青群底部角砾岩同样不整合在青龙群之上,称淮阳运动,并强调淮阳运动结束了古生代以来下扬子地区长期海侵的历史,在地质发展中具有重要的变革作用。李四光[3]从区域的角度肯定了金子运动(淮阳运动)在华南和东南亚地区的地质意义。1962年以来,不少单位和个人[4,5,6]对此期运动作了研究,并肯定了它的存在。 相似文献
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THE CONFIGURATION OF THE BASEMENT BENEATH THE ZAGROS BASIN 总被引:4,自引:0,他引:4
It has long been recognised that the deposition and deformation of the Phanerozoic cover in the Zagros Basin (mountains plus foreland) was strongly influenced by the reactivation of old tectonic fabrics in its basement. Facies boundaries and structures trending north-south and NW-SE can be attributed to the reactivation of Pan-African sutures and Najd faults which are exposed in the Nubian-Arabian Shield. However, to the east of a projection of the Oman line SWwards into the Rhub Al Khali Basin, cover structures have a NE-SW trend which is not seen in Arabia. This boundary may overlie a Pan-African suture between Arabia and India (Somalia or Pakistan).
Data including magnetic intensities, geothermal gradients and isopach maps are used here to distinguish old faults which were reactivated in the basement from more recent faults formed in the cover by Zagros shortening. Old faults trending NW-SE are interpreted as having reactivated episodically since the Permo-Triassic opening of Neo-Tethys; perhaps more significantly, the basement faults that reactivated in the East Arabian Block since then trend north-south. The basement configuration is clarified by extending a modified East Arabian Block across the Zagros to an "East Arabian-Zagros block" in which the NW trend of the Zagros lies between two syntaxes. This suggests a new tectonic framework for the region. The repeated reactivation of basement faults throughout the East Arabian-Zagros Block controlled source rocks, traps and seals for the supergiant and giant oil and gas reserves which are present at various stratigraphic levels in different areas. 相似文献
Data including magnetic intensities, geothermal gradients and isopach maps are used here to distinguish old faults which were reactivated in the basement from more recent faults formed in the cover by Zagros shortening. Old faults trending NW-SE are interpreted as having reactivated episodically since the Permo-Triassic opening of Neo-Tethys; perhaps more significantly, the basement faults that reactivated in the East Arabian Block since then trend north-south. The basement configuration is clarified by extending a modified East Arabian Block across the Zagros to an "East Arabian-Zagros block" in which the NW trend of the Zagros lies between two syntaxes. This suggests a new tectonic framework for the region. The repeated reactivation of basement faults throughout the East Arabian-Zagros Block controlled source rocks, traps and seals for the supergiant and giant oil and gas reserves which are present at various stratigraphic levels in different areas. 相似文献
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微构造对油水运动规律的影响 总被引:2,自引:0,他引:2
对微构造的成因和分类进行了论述,并以张天渠油田为例,就各种微构造组合方式对油水运动规律的影响进行了说明,得出结论:正向微构造为油气富集区,负向微构造为低含油气或严重水淹区。在确定加密井井别时,应尽可能地把生产井钻在正向微构造区,把注水井钻在负向微构造区。 相似文献
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本文阐明了最大熵反褶积(MEDEC)的理论根据,并证明:仅当地层脉冲响应为白噪序列和子波为最小相位时,MEDEC预测滤波器的逆为子波的最小相型,地震序列预测滤波输出的误差序列等于地层脉冲响应的估值;同时还分析了它的误差来源;模拟实例证实了以上分析.阐明克莱鲍特(Claerbout)将伯格(Burg)递推中的偏相关系数看成层反射系数的解释,只适应于Goupilau型地层中深部震源子波为白噪的模型,而不能把他的解释误解为MEDEC的理论根据.作者提出一种使褶积序列中子波最小相位化的滤波器G(z)的求法:将G(z)=S(z~(-1))/Sm(z~(-1))用升幂长除展开,即提G(z)的时间响应g(n),这是一种精确算法而非统计估计.这里定义S(n)为子波,S_m(n)为它的最小相型,S(z)=(s(n)),S_m(z)=z(S_m(n)).作者还导出一个多项式长除的快速递推公式,它不仅可以求解上述最小相位化滤波器,还可以以求有理分式型系统或信号z变换的反变换. 相似文献
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大别山东南缘前陆盆地经历了由海相—海陆过渡相—陆相的演化历程,具有复合叠合盆地特征。从盆地层序上看,早中生代陆相前陆沉积体系下伏晚古生代海相被动陆缘沉积体系;从烃源岩系和含油气系统特征上看,具有陆相和海相两大套烃源岩系和成油气体系。其中,前陆盆地下伏海相被动陆缘烃源岩的优劣和保存条件是能否形成油气藏的关键。研究证明,晚古生代海相被动陆缘沉积发育优质烃源层系,热演化中等偏高,油气兼生;海相和陆相碎屑岩具有良好储集条件;海相和陆相蒸发相含膏岩系为优质盖层,生储盖配置关系良好,具有形成油气赋存的基本石油地质条件。 相似文献
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扬子地区古生代盆地基底普遍具有双层结构,下层中深变质基底由太古-下元古界麻粒岩相-角闪岩相、角闪岩相-高绿片岩相变质岩组成,同位素地质年龄为25~31亿年、20~25亿年,反映了陆核、陆块两个不同的发展阶段;上层浅变质基底由中元古界低绿片岩相变质岩组成,同位素地质年龄为10~20亿年,中元古代末的内硅铝造山作用及A型俯冲作用使全区连成不成熟的泛大陆,其西部、北部则发展为低稳定性的克拉通。 相似文献
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采用研制的4-J氧甲酰氨基甲苯2-异氰酸酯(BCATI)或4-丙烯酰氧乙氧甲酰氨基甲苯2-异氰酸酯(AECATI)中的异氰酸基与环氧树脂或丙烯酸环氧酯树脂中的部分羟基反应,得到改性环氧树脂。经优选试验,得到了合成的适宜条件。通过化学测试与IR图解析,确定了有关合成反应的终点与产物结构,并以改性树脂为原料制成了性能优良的情漆。 相似文献
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介绍了引进的缩聚装置后缩圆盘反应器轴封结构工作原理, 分析了该轴封结构的优缺点,并提出了改进措施。 相似文献
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桅杆的竖立 ,是使用桅杆式起重机吊装大型设备的重要前提和准备。针对使用旋转法竖立桅杆时 ,对其封底滑轮组的放松速度作了理论推导 ,并结合工程实际 ,对推导结果进行了简要分析。 相似文献
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本文从基底时代、基底结构、沉积盖层、构造格局和水系分布等特征,论述了洞庭湖盆地北部与南部的差异性及与江汉盆地的相似性,从遥感图象上提取大量信息,经处理、解译认为,可把洞庭湖盆地北部和江汉盆地看作为一个整体,这对石油天然气勘探将是有益的。 相似文献
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K. W. Glennie 《Journal of Petroleum Geology》1996,19(1):125-125
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天然气合成润滑油基础油技术发展前瞻 总被引:2,自引:1,他引:1
GTL(天然气合成液态烃)技术已有70多年的历史,由于投资费用的原因一直停留在理论上。但近年来,世界各大石油公司在考虑了原油价格、世界对环保要求和使用清洁燃料等诸多方面的关系后,投资了一系列GTL项目。文章从GTL的技术本身及其产品质量以及带来的经济价值与规模效应进行了GTL技术发展前瞻,认为GTL的时代最终会到来。 相似文献
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The Triassic-Liassic contact in the Levant is a distinct sedimentary break expressed by lateritic palaeosols (Mishhor) or volcanics (Asher). A marine platform carbonate regime began in the Pliensbachian (Ardon-Nirim) and continued in the Toarcian (Qeren-Nirim). It was interrupted by Toarcian-Aalenian clastics in the Negev, adjacent Sinai and along a belt crossing Central Israel into South Anti-Lebanon (Inmar-Rosh Pinna). In Northern Israel, Lebanon and North Anti-Lebanon it persisted without interruption through the Oxfordian (Haifa or Kesroaune). Bajocian lithofacies vary from being mixed in the Negev (Daya), to largely marly in Sinai (Maghara), and to monotonous Bajocian-Oxfordian platform-carbonates (Haifa) in the north. Bajocian-Bathonian lithofacies in the Coastal Plain consist of Haifa carbonates, interwedged by oolitic shoals (Sederot) and spiculites (Barnea). Paralic clastics dominate the early Bathonian in the south (Safa-Sherif), followed by middle-late Bathonian micrites and marls (Kehailia/Karmon). The latter characteristic body of shales continues to the Callovian, and in the Coastal Plain separates the Bathonian carbonates from the early Callovian calcarenites (Brur). Callovian-Oxfordian platform micrites are interwedged by marls and biostromes in the Negev (Zohar-Beersheba) but may consist of bioherms (Nir'Am) in the Coastal Plain. A complete or partial hiatus of the middle-late Callovian coincides with the extension of the transgressive onlap of early Oxfordian shales (Kidod) from North Sinai to South Anti-Lebanon, crossing the Coastal Plain and Central Israel. Kimmeridgian oolites, shales and occasionally sands (Halutza) terminate the Jurassic cycle, ending in a regional uplift followed by subaerial denudation or submarine canyons (Gevar-Am). The palaeotectonic setting of the Jurassic in Israel and adjacent Sinai, prior to Infra-Cretaceous truncation, consists of the Negev High which extends to the coastal plain area (Beersheba nose), separating the North Sinai Maghara Basin from the Central Israel-Hermon trough, the latter being disturbed by Lartet's (1869) Neogene-Quaternary wrench movement of over 100 km sinistral displacement. A rather shallow platform in the north includes Galilee, Lebanon and North Anti-Lebanon. The clastics of the Liassic-Bathonian part of the sequence are connected with the wearing-down of the Arabian Massif in the south and SE. Yet the thickening of the early Oxfordian shales in the offshore wells points to derivation from some landmass in the west, now hidden beneath the Mediterranean. 相似文献