Hydrocarbon fields that are located offshore Abu Dhabi, United Arab Emirates (UAE), are known to be associated with undulating thick sedimentary sequences. These undulations are mostly influenced by variations in the depth of Infracambrian Hormuz salts that generate negative gravity anomalies. Nonetheless, a few known oil fields are uncorrelated with the airborne gravity observations. This is attributed to the interference from large positive gravity anomalies from basement highs. To filter out the effect of basement, we calculate the pseudogravity effect of the airborne magnetic anomalies and subtract it from the gravity anomalies. The resultant gravity anomalies mainly represent the effect of the salt domes. The results uncover deep salt structures and introduce potential traps for hydrocarbons that have proved difficult to map accurately with current seismic techniques. A nonlinear 3D inversion modeling of corrected magnetic and decreased gravity data is also used to determine the depth to basement and the Infracambrian Hormuz salts over two regions. Our findings demonstrate that the depth to basement in these regions changes from 7100 to 9700 m, and the depth to Infracambrian Hormuz salt changes from 5800 to 9400 m, with a variable thickness with a maximum of 2700 m.

众所周知，位于阿拉伯联合酋长国阿布扎比近海的油气田与起伏的厚层沉积序列有关。这些波动主要受产生负重力异常的下寒武纪霍尔木兹盐深度的变化影响。然而，一些已知的油田与空中重力观测无关。这归因于来自地下室高位的大正重力异常的干扰。为了滤除地下室的影响，我们计算了机载磁异常的拟重力效应，并将其从重力异常中减去。由此产生的重力异常主要代表盐穹顶的影响。结果揭示了深层盐结构，并引入了潜在的碳氢化合物陷阱，事实证明，这些碳氢化合物很难用当前的地震技术准确测绘。校正后的磁场数据和减小的重力数据的非线性3D反演模型也用于确定到两个地下区域的基底深度和下寒武纪霍尔木兹盐。我们的发现表明，这些区域的基底深度从7100变为9700 m，而下寒武纪霍尔木兹盐的深度从5800变为9400 m，厚度可变，最大为2700 m。