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首页> 外文期刊>Universal Journal of Geoscience >Interpreting Seismic Profiles in terms of Structure and Stratigraphy, an Example from Lower Indus Basin Pakistan
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Interpreting Seismic Profiles in terms of Structure and Stratigraphy, an Example from Lower Indus Basin Pakistan

机译：从结构和地层学角度解释地震剖面，以巴基斯坦下印度河流域为例

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Structural delineation and Stratigraphic evaluation of proven geological basins are of prime importance for hydrocarbon exploration and exploitation. The current study aims to map the subsurface geology in a part of Lower Indus basin of Pakistan in terms of structure and stratigraphy using seismic data with some borehole information. In this paper, conventional integrated geophysical technique has been used to analyze the seismic data to characterize reservoir formations. To pursue the interpretation, 2D seismic data in SEG-Y format was used along with velocity and well logs information. Visual interpretation of seismic profiles is transformed into 2D and 3D (Time and Depth domain) contour maps, which is the representation of true subsurface geology. Three promising closures at shallow time have been identified on structural contour maps which are indicative of possible prospects. A closure, covering approximately 1 Sq. Km area over Eocene aged Sui Main Limestone and further two over Cretaceous aged Lower Goru formation covering areas of 500 and 400 Sq. km along shot point 260 and 380-390, respectively. Conjugate normal fault system among the stratigraphic layers existing in the study area can smoothly provide the hydrocarbon trapping mechanism. In order to further confirm the probable future prospects and support the study, modeling of P and S wave Acoustic Impedance have also been done. The advance integrated study of AVO modeling and numerical rock physics analysis may be helpful in providing further insights into current research.
机译：已探明地质盆地的结构描述和地层评价对油气勘探和开发至关重要。目前的研究旨在利用地震数据和一些井眼信息，根据构造和地层图，绘制巴基斯坦下印度河盆地一部分地区的地下地质图。在本文中，常规的综合地球物理技术已被用于分析地震数据以表征储层构造。为了进行解释，将SEG-Y格式的2D地震数据与速度和测井信息一起使用。将地震剖面的可视化解释转换为2D和3D（时间和深度域）等高线图，这是真实地下地质的表示。在结构轮廓图上已经确定了浅层时间的三个有希望的闭合，这些闭合表明可能的前景。封闭，占地约1 Sq。始新世岁的隋主灰岩上的公里面积，白垩纪老下古鲁地层上的两个公里面积，面积分别为500和400 Sq。分别沿着射击点260和380-390公里。研究区域内地层之间的共轭正断层系统可以平稳地提供油气捕集机制。为了进一步确认可能的未来前景并支持该研究，还对P和S波声阻抗进行了建模。 AVO建模和数值岩石物理分析的高级集成研究可能有助于提供对当前研究的进一步见解。

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