ABSTRACT Land subsidence is one of the most hazardous phenomena. Rapid rate subsidence corresponds to human activities such as subsurface withdrawal. Therefore, local changes in surface elevation and its associated response has the potential to damage the industrial structures. In this research, the small baseline subset (SBAS) algorithm is applied to perform an Interferometric Synthetic Aperture Radar (InSAR) time series analysis within 2003 and 2010 over a giant oilfield located in the Zagros fold-thrust belt in southwest of Iran. Thirty-one interferograms are generated using 18 Envisat ASAR images. The mean velocity map obtained in the Line-Of-Sight (LOS) direction of satellite to the ground reveals the maximum subsidence on order of 17.3 mm per year over the field due to both tectonic and non-tectonic features. In order to assess the effect of non-tectonic features such as petroleum exploitation on surface displacement, the results of InSAR have been compared with the oil production rate. Also, a physical model of reservoir pattern has been developed using 2D seismic profiles as the way to estimate tectonic deformation which indicates the influence of depth variations of the Gachsaran salt decollement on structural style.

中文翻译：

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使用 InSAR 和物理建模研究伊朗西南部油田的地表变形（2003-2010）

摘要 地面沉降是最危险的现象之一。快速沉降对应于人类活动，例如地下撤退。因此，地表高程的局部变化及其相关响应有可能破坏工业结构。本研究应用小基线子集（SBAS）算法对位于伊朗西南部扎格罗斯褶皱冲断带的大型油田进行了2003年和2010年的干涉合成孔径雷达（InSAR）时间序列分析。使用 18 个 Envisat ASAR 图像生成 31 个干涉图。在卫星到地面的视线 (LOS) 方向上获得的平均速度图显示，由于构造和非构造特征，该领域每年的最大沉降量为 17.3 毫米。为了评估石油开采等非构造特征对地表位移的影响，将InSAR的结果与产油率进行了比较。此外，还使用二维地震剖面开发了储层模式的物理模型，作为估计构造变形的方法，表明 Gachsaran 盐析层的深度变化对构造样式的影响。