Southern Tunisia belongs to the Sahara desert, one of the driest regions of the world, where groundwater research is crucial to satisfy the water demand. In this region, the Jurassic aquifer appears as a potential resource. Nevertheless, the related information is too limited to develop a suitable plan for exploitation. The present study aimed for a thorough understanding of the Jurassic series using borehole and seismic reflection data. Well logs from 40 petroleum boreholes were analyzed both qualitatively and quantitatively to define precisely the potential water reservoirs and determine their petrophysical characteristics. Comparison of the various recordings revealed the abundance of sandstone and dolomite deposits in the Sebaia Formation (Dogger–Malm) and the evaporitic composition of the Abreghs Formation (Lias). The Sebaia Formation is enriched in clays toward the south as indicated by well logs correlation and computed shale volumes (V_sh reaching 27.8%). The south-east part of Southern Tunisia contains mostly sandy Jurassic reservoirs, exhibiting the highest estimated porosities (22.8–31%). Lithostratigraphic correlations were established to firstly approach the geometry of the Jurassic aquifer. These correlations highlighted that the Jurassic series have variable depth and thickness along the Dahar structure, which thicken and deepen from the Dahar to the west and disappear in the Jeffara. These findings were further refined by the interpretation of 198 seismic profiles, which display several NW–SE-, E–W- and NE–SW-trending normal faults that influenced the Jurassic reservoirs depth, thickness, facies and petrophysical characteristics as well as groundwater circulation. The present study yielded interesting results that may enormously guide the investigation of the Jurassic aquifer in Southern Tunisia. Furthermore, it may be considered as an example for hydrogeophysical applications in the “Sahara” and other arid zones worldwide.

突尼斯南部属于撒哈拉沙漠，是世界上最干旱的地区之一，地下水研究对于满足用水需求至关重要。在该地区，侏罗纪含水层似乎是一种潜在资源。然而，相关信息过于有限，无法制定合适的开发计划。本研究旨在利用钻孔和地震反射数据全面了解侏罗纪系列。对 40 个石油钻孔的测井曲线进行了定性和定量分析，以精确确定潜在水藏并确定其岩石物理特征。各种记录的比较揭示了 Sebaia 组（Dogger-Malm）中丰富的砂岩和白云石矿床以及 Abreghs 组（Lias）中的蒸发岩成分。测井对比和计算的页岩体积表明，Sebaia 组向南富含粘土（V _sh 达到 27.8%）。突尼斯南部的东南部地区主要包含侏罗纪砂质储层，估计孔隙度最高（22.8-31%）。建立岩石地层对比首先探讨侏罗纪含水层的几何形状。这些相关性表明，侏罗系沿达哈尔构造具有不同的深度和厚度，从达哈尔向西增厚并加深，并在杰法拉消失。这些发现通过对 198 个地震剖面的解释进一步完善，这些地震剖面显示了影响侏罗纪储层深度、厚度、相和岩石物理特征以及地下水的若干 NW-SE-、E-W- 和 NE-SW- 走向的正断层循环。 本研究产生了有趣的结果，可能极大地指导突尼斯南部侏罗纪含水层的调查。此外，它可以被视为“撒哈拉”和世界其他干旱地区水文地球物理应用的一个例子。