Casing Collapse and Wellbore Stability Based on Experimental and Numerical Analysis Studies

Casing collapse phenomenon is a cause of a large amount of expense in the oil and gas companies. Maintaining well integrity is highly important in oil/gas wells and casing collapse maybe the cause of well loss. Consequently, determination of main causes of wellbore instability and casing failure and the ways to prevent them is an essential issue to avoid wellbore instability problems. There are lots of reasons lead to casing collapse such as pore pressure and geological aspects like tectonic stresses and compaction of the reservoir/formation, poor cementation due to disbanding of cement from formation or casing or mechanical failure of the cement, and pipe corrosion such as local pits and metal loss. This present paper deals with discussion about the main causes of casing collapse and wellbore instability and solutions. Moreover, the new method called Neural Network is introduced and its application stated as a valuable option to predict and study well problems

کلیدواژه ها:

Casing Collapse ، Well Integrity ، Pore Pressure ، Neural Network ، Corrosion ، Cementation