Abstract

3D structural modeling is an effective technique for the 3D structural analysis of anticlines. The 3D interpretation of structures is most of the matter in the oil development of subsurface reservoirs. In this study, the 3D structural modeling was used for the analysis of Lab-e-Safid and Qale Nar subsurface anticlinal oilfields in the northern Dezful Embayment. The main objectives are determining the structural style in the different parts and the kinematic evolution modeling of these anticlines. 2D cross-sections, extracted from 3D models, were compared to 2D interpreted seismic profiles. Anticlines are formed above the intermediate décollement horizon in the northern Dezful Embayment. Structural style varies horizontally and vertically. Lab-e-Safid anticline shows an early step in the evolution path. In contrast, Qale Nar anticline indicates the final step of the evolution path. The Qale Nar anticline is a box fold in the western part and concentric fold in the central and eastern parts. The fold shape of Lab-e-Safid is stationary along the axial plane. Late-stage folding evolution is associated with the complexity structural style of folding. Progressive deformation of early detachment anticlines caused the development of folding followed by faulting in the forelimb.

中文翻译：

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应用 3D 结构建模来分析结构几何形状和运动学演化：来自伊朗德兹富尔湾北部 Lab-e-Safid 和 Qale Nar 地下背斜的案例研究

摘要

3D 构造建模是背斜 3D 构造分析的有效技术。结构的 3D 解释是地下储层石油开发中的大部分内容。在本研究中，3D 结构建模用于分析 Dezful Embayment 北部的 Lab-e-Safid 和 Qale Nar 地下背斜油田。主要目标是确定不同部位的构造样式和这些背斜的运动演化模型。从 3D 模型中提取的 2D 横截面与 2D 解释的地震剖面进行了比较。背斜形成于 Dezful Embayment 北部的中间 décollement 地平线上方。结构风格水平和垂直变化。Lab-e-Safid 背斜显示了演化路径的早期步骤。相比之下，Qale Nar 背斜表明演化路径的最后一步。Qale Nar背斜西部呈箱形褶皱，中部和东部呈同心褶皱。Lab-e-Safid 的折叠形状沿轴向平面是固定的。后期折叠演化与折叠的复杂结构样式有关。早期脱离背斜的渐进变形导致褶皱的发展，然后是前肢的断层。