Central Algerian Sahara hosts many prolific hydrocarbon accumulations in the Paleozoic successions. In this work a contemporary stress field of the Saharan platform has been evaluated using the dataset from recently drilled wells in El Agreb, El Gassi and Hassi Messaoud fields. A pore fluid pressure gradient of 0.56 PSI/feet is interpreted from the in-situ measurements in the Paleozoic reservoir units. Vertical stress (S_v) modeled from the bulk-density data indicates an average of 1.02 PSI/feet gradient. Rock elastic property-based approach is employed to model the magnitudes of minimum (S_hmin) and maximum horizontal stress (S_Hmax) components, which were calibrated with leak off test/minifrac and breakout widths, respectively. Paleozoic stress profiles reveal S_hmin/S_v range of 0.74–0.84, while S_Hmax/S_v varies between 1.1 and 1.33. Subsurface stress distribution indicates that the present-day stress field in the Saharan platform is principally strike-slip faulting (S_Hmax > S_v > S_hmin). A cumulative 1490 m of B-D quality wellbore breakouts, inferred from the acoustic image logs, suggest a NW-SE/WNW-ESE S_Hmax orientation, which is parallel to the absolute African plate motion and Africa-Eurasia plate convergence direction, implying ridge push force to be the dominant contributor to the tectonic stress field. Mean S_Hmax orientation shows slightly anticlockwise rotation (126°N to 144°N) from south (El Agreb) to north (Hassi Messaoud field). Inferences are discussed regarding the fault slip potential and hydrocarbon reservoir development.

阿尔及利亚中部撒哈拉地区在古生代有许多油气藏。在这项工作中，使用来自最近在El Agreb，El Gassi和Hassi Messaoud井中钻井的数据集评估了Saharan平台的当代应力场。孔隙流体压力梯度为0.56 PSI /英尺，这是根据古生界储层单元的现场测量得出的。根据堆密度数据建模的垂直应力（S _v）表示平均值为1.02 PSI /英尺梯度。采用基于岩石弹性特性的方法对最小（S _hmin）和最大水平应力（S _Hmax）的大小进行建模）组件，分别通过泄漏测试/最小分数和击穿宽度进行校准。古生界应力分布揭示小号_HMIN / S _v的0.74-0.84范围内，而小号_ħ米斧/ S _v 1.1和1.33之间变化。地下应力分布表明，撒哈拉平台当前的应力场主要为走滑断层（S _Hmax  > S _v  > S _hmin）。从声波图像测井推断，BD质量井眼累计破裂1490 m，表明NW-SE / WNW-ESE S _{H m ax}方向平行于绝对的非洲板块运动和非洲-欧亚大陆板块的收敛方向，这意味着山脊推力是构造应力场的主要贡献者。平均S _Hmax方向显示从南（El Agreb）到北（Hassi Messaoud场）略有逆时针旋转（126°N至144°N）。讨论了有关断层滑动潜力和油气藏开发的推论。