In the study of sequence stratigraphy in continental rift basins, the use of seismic data to track different levels of sequence stratigraphic boundaries laterally is the key to the division of sequence stratigraphic units at all levels and the establishment of an isochronous sequence stratigraphic framework. Traditional seismic interpretation and the establishment of a 3D sequence stratigraphic structure model are a difficult research work. This paper introduces the concept of cost function minimization and performs global stratigraphic scanning on 3D seismic data to interpret horizons and faults in a large grid. Constrained by the results, human-computer interactive intelligent interpretation, by adding iterative interpretation of geological knowledge, established a global stratigraphic model with a relative geological age. The application in the Lower Cretaceous Shahezi Formation of Xujiaweizi fault depression shows that this technology has improved the accuracy and efficiency of sequence stratigraphic interpretation, and the application of this technology has achieved the interpretation of each event horizon under the current seismic data resolution conditions. In this way, a continuous sequence stratigraphic model is established. From this stratigraphic model, any high-frequency sequence-interpreted seismic horizon can be extracted, which provides a basis for the combination of lateral resolution and longitudinal resolution of subsequent reservoir prediction.

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全局优化层序地层地震解释技术研究与应用——以徐家围子断陷下白垩统沙河子组为例

在大陆裂谷盆地层序地层研究中，利用地震资料横向追踪不同层次层序地层边界，是划分各级层序地层单元、建立等时层序地层格架的关键。传统的地震解释和 3D 层序地层结构模型的建立是一项艰巨的研究工作。本文介绍了成本函数最小化的概念，并对 3D 地震数据进行全局地层扫描，以解释大网格中的层位和断层。受结果约束，人机交互智能解释，通过加入地质知识的迭代解释，建立了具有相对地质年代的全球地层模型。在徐家围子断陷下白垩统沙河子组的应用表明，该技术提高了层序地层解释的准确性和效率，该技术的应用实现了当前地震资料分辨率条件下各事件层的解释。这样就建立了连续层序地层模型。从这个地层模型中，可以提取任何高频序列解释的地震层位，为后续储层预测的横向分辨率和纵向分辨率相结合提供依据。该技术的应用，实现了当前地震资料分辨率条件下各事件层的解释。这样就建立了连续层序地层模型。从这个地层模型中，可以提取任何高频序列解释的地震层位，为后续储层预测的横向分辨率和纵向分辨率相结合提供依据。该技术的应用实现了在当前地震资料分辨率条件下对每个事件层的解释。这样就建立了连续层序地层模型。从这个地层模型中，可以提取任何高频序列解释的地震层位，为后续储层预测的横向分辨率和纵向分辨率相结合提供依据。