ABSTRACT
In Romania the emphasizing of oil-field structures in deep geological conditions is related usually to the overcrossing of thick salt deposits (500–3000 m) located over the oil potential structures. To overcross by drilling such salt deposits induce major risks, which can compromise their initial development (drilling and cementation) and also their further behavior — the stability of the drill hole. During the drilling process, it has been observed from a practical point of view, certain difficulties, such as: excavations, hole diameter diminishment and technical injuries, which lead in some cases to the abandonment of drilling operations.
The above mentioned considerations and others, not detailed here, have required an approach involving the research of salt behavior with respect to deformation. These studies are directed to establishing the interaction mechanism between the salt massif and the drilled hole. The main goal being to provide hole stability until their intubation (mainly directed to the drilling mud properties) and also after this operation (cementing materials employed, type and quality of ducts, their sizes, etc.) in fact everything being related to drilling hole stability.
