The in-situ stress fields are of great importance in the interpretation of tectonic features and the analysis of hydrocarbon systems. In this work, we determine the in-situ stress field, pore pressure, stress regime, and fracture gradient in the Hilal oil field at the southern Gulf of Suez, Egypt. Wireline logs of four wells and direct borehole measurements were used to analyze the pore-pressure and fracture gradients. Drilling-induced fractures and borehole breakouts, which were observed on fullbore microimages, were used to determine the orientations horizontal stress axes. The study revealed: 1) A maximum horizontal stress axis, S_HMAX, with mean orientation of 150°; 2) This stress orientation in Hilal oil field differs from the stress orientation in neighboring oil fields, and thus indicate stress rotations in the southern Gulf of Suez; 3) The determined stress orientations confirm the structural complexity of the southern sub-basin; and 4) The documented rotation of the present-day stress state in the southern sub-basin contributes to our understanding of the paleo-stress field interpretations in the Suez rift basin. The presneted analysis assists in drawing an updated stress field map of the tectonically active Rift Basin, and leads to better understanding of the neotectonics in an extensional rift basin.

地应力场在构造特征解释和油气系统分析中具有重要意义。在这项工作中，我们确定了埃及苏伊士湾南部希拉勒油田的地应力场，孔隙压力，应力状态和裂缝梯度。使用四口井的电缆测井和直接的井眼测量来分析孔隙压力和裂缝梯度。在全孔显微图像上观察到的由钻井引起的裂缝和井眼破裂被用来确定水平应力轴的方向。研究显示：1）最大水平应力轴S _HMAX，平均方位角为150°；2）希拉尔油田的应力方向与邻近油田的应力方向不同，因此表明苏伊士湾南部的应力旋转。3）确定的应力方向证实了南部次盆地的结构复杂性；（4）记录在案的南亚流域现今应力状态的旋转有助于我们理解苏伊士裂谷盆地的古应力场解释。预先分析的分析有助于绘制构造活跃的裂谷盆地的最新应力场图，并有助于更好地理解伸展裂谷盆地中的新构造。