Drilling technology of huge salt bed in well SLK3 in Kazakhstan

Petroleum exploration and development are severely restricted by huge salt bed in Kerzhan area of Kazakhstan. Consid- ering the salt bed drilling technology both at home and abroad, the overhead drilling technology and amphion sulfonate saturated salt drilling luid system are used in salt bed of well SLK3. The problems caused by the development of huge salt-gypsum bed, salt plastic creep, formation heterogeneity, high pressure and high temperature, circulation loss and wellbore instability are all solved by optimizing drilling schemes, which ensures the easy drilling of Well SLK3. Most geologic information about huge salt bed and oil gas resources under salt bed in Kerzhan area are completely obtained with accuracy for the irst time. The synthetical drilling technology at huge salt bed in this area is developed, which is of great signiicance for future oil gas resources exploration under salt bed in Kerzhan area.