Salt domes are quite hard to drill through, drill pipes or strings can be stuck, drilling fluids must be composed differently, for instance drilling muds and cement slurries need to be saturated, additional chemicals may be used for slurry stability, which compositions can then be tricky to design and simulate based on in situ temperature, pressure and rocks mineralogy. Hope this helps.
Salt structures can be both beneficial and problematic for oil exploration and production. Their impact depends on various factors, including the specific geology of the area, the type of salt structure, and the presence of other essential elements for a hydrocarbon system.
It's important to note that modern exploration techniques, such as advanced seismic imaging and drilling technologies, are continuously improving the ability to overcome challenges associated with salt structures, making them valuable exploration targets despite the complexities involved.
There are two main conditions for a rock to be a good hydrocarbon reservoir: porosity to collect fluids and permeability to allow the fluid flows through it. So the salt doesn't met these properties together fulfilled. Additionally, salt is very dangerous during the drilling process, because contaminate the drilling mud and can lead to the well getting out of control.