莺山断陷临江地区地震解释与构造特征研究

发布时间：2018-02-08 21:02

  本文关键词： 莺山断陷 地震解释 构造特征 有利区　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：本文利用三维地震资料,通过人工合成地震记录进行层位标定,建立层序地层格架,进而完成临江地区的地震资料精细解释工作。在完成解释工作后,进一步利用速度谱和VSP资料建立速度体,得到各反射层平均速度,将时间剖面与平均速度相乘,最终转化为深度剖面,由于深浅层的构造特征不尽相同,因此有必要根据深浅层的不同特征进行构造单元的划分,同时要对断裂的发育特征和分布特征进行概括总结,并在此基础之上最后完成构造样式和构造层的划分。在完成上述工作后,最后要总结工区的生储盖等有利条件,完成有利区预测。莺山断陷深层可以划分为四站古隆起、中部洼槽、东部斜坡和北部低隆四个构造单元,浅层则呈现出“西低东高”的主要形态特征。此外,盆地在早期拉张力的作用下主要构造样式为伸展构造,因此在纵向上依次可以划分为断陷构造层、断坳转化构造层、坳陷构造层及反转构造层四个构造层,其界面分别为营城组顶面、登娄库组顶面和嫩江组顶面。结合各反射层层位特点,最终确定伸展构造样式为主要构造样式,在地震剖面上主要表现为产状断层及滚动背斜。可以看到四个构造层的划分结果与拉张断陷期、断坳转化期、沉积稳定期和构造反转期四个盆地演化阶段相对应。最后会发现在早期拉张力的作用下,断层在断陷期比较活跃。通过对工区生储盖等有利条件的充分研究,并结合基底断裂的构造特征,确定工区南部应该具有控制油气藏形成的有利条件,同时具有良好的生储盖组合及完整的油气运移通道,所以最终确定有利区为工区南部凹陷区。
[Abstract]:In this paper, using 3D seismic data, the stratigraphic framework of sequence is established by using synthetic seismic records to calibrate the horizon, and the fine interpretation of seismic data in Linjiang area is completed. The velocity body is established by using velocity spectrum and VSP data, and the average velocity of each reflectance layer is obtained. The time profile is multiplied by the average velocity, and the depth profile is transformed into the depth profile, because the tectonic characteristics of the deep and shallow layers are different. Therefore, it is necessary to divide the tectonic units according to the different characteristics of the deep and shallow layers, and at the same time to sum up the development and distribution characteristics of the faults. On this basis, the structural style and the division of tectonic layers are finally completed. After the above work has been completed, it is necessary to summarize the favorable conditions, such as the generation, reservoir and cover, and to complete the prediction of the favorable areas. The deep layers of the Yingshan fault depression can be divided into four stations of paleouplift. The four tectonic units of the central depression, the eastern slope and the northern low uplift show the main morphological characteristics of "west low east high" in the shallow layer. In addition, the main structural style of the basin under the early tension is extensional structure. Therefore, vertically, it can be divided into four structural layers: fault-depression structural layer, fault-depression transformation structural layer, depression structural layer and reverse structural layer, whose interface is the top surface of Yingcheng formation, respectively. The top plane of Denglouku formation and the top surface of Nenjiang formation. According to the characteristics of each reflection layer, the extensional structural style is determined as the main structural style. In the seismic section, the main features are the occurrence fault and the rolling anticline. It can be seen that the division of the four tectonic layers and the extensional fault depression, the fault-depression transformation period, The sedimentary stable period corresponds to the four evolution stages of the tectonic inversion period. Finally, it will be found that the faults are active in the faulting period under the action of early tension. Combined with the structural characteristics of basement faults, it is determined that the southern part of the working area should have favorable conditions to control the formation of oil and gas reservoirs, and at the same time have good source, reservoir and cap assemblages and complete oil and gas migration channels, so it is determined that the favorable area is the south sag of the working area.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P631.4

【参考文献】

中国期刊全文数据库 前1条

1 张进铎;;地震解释技术现状及发展趋势[J];地球物理学进展;2006年02期

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本文编号：1496265