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首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >Data-Driven Sequence Stratigraphy of the Cretaceous Depositional System, Punjab Platform, Pakistan
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Data-Driven Sequence Stratigraphy of the Cretaceous Depositional System, Punjab Platform, Pakistan

机译：巴基斯坦旁遮普平台白垩纪沉积体系的数据驱动层序地层学

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摘要

The Punjab Platform is a gently dipping monocline that has been drilled since the 1960s with a low success ratio. Most of the drilling targets in the past were based on the structural interpretation. Furthermore, the exploration focus remained in Paleozoic sequences, and little attention has been paid to the Cretaceous systems. In this paper, a prograding Cretaceous (Sembar-Goru) mega-sequence is subdivided into three sequences using a semi-automated and integrated workflow. A data-driven chronostratigraphic chart is prepared, which revealed several regressive stages in the study area. The sands developed during these stages are laterally sealed by shales and claystones that form a stratigraphic play. The stratigraphic play area lies in a shoreface environment where shoreface sands are expected to be charged by underlying Lower Cretaceous black shales. A prominent gas cap above the proposed stratigraphic play further increases the confidence on the presence of a reservoir. This paper is the first attempt to study the Cretaceous deltaic sequences in the study area, which has remained unexplored for the last six decades.
机译：旁遮普平台是自1960年代以来钻出的缓倾斜的单斜线，成功率较低。过去，大多数钻探目标都是基于构造解释。此外，勘探重点仍然在古生代，而对白垩纪系统的关注却很少。在本文中，使用半自动化和集成的工作流，将一个逐步升级的白垩纪（Sembar-Goru）巨型序列细分为三个序列。准备了一个数据驱动的年代地层图，该图揭示了研究区的几个回归阶段。在这些阶段中发育的沙子被形成地层的页岩和粘土岩横向密封。地层活动区位于海岸环境中，预计下白垩统黑色页岩会充填海岸砂。提议的地层间隙上方明显的气顶进一步增加了对储层存在的信心。本文是研究区域内白垩纪三角洲层序的首次尝试，该区域在过去的六十年中一直未被开发。

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