Analyses of Thermal Disturbance in Drilling Deep and High Temperature Formations

作者：Khurshid I; Lee K J; Choe J^*

来源：Energy Sources, Part A: Recovery, Utilization, and Environmental Effects , 2013, 35(16): 1487-1497.

DOI：10.1080/15567036.2010.529562

• geothermal temperature model
• high pressure high temperature
• temperature profile
• thermal disturbance
• wellbore stability

Wellbore stability is one of critical issues in drilling operations in all types of environments. The wellbore stability in heat sensitive formations, such as through gas hydrates bearing formations, is largely dependent upon the flow of heated mud into these formations and their dissociation. The objective of this study is to analyze the thermal disturbance due to the flow of heated mud. A wellbore temperature simulator is developed and sensitivity analyses of drilling parameters are made to monitor the factors affecting thermal disturbance. It is found that due to an increase in well depth, the mud becomes hot enough and greatly disturbs the in-situ formations temperature of shallow formations. This formation thermal disturbance is critical, particularly in gas hydrate bearing formations and in the permafrost regions where formation heating can cause severe wellbore stability problems.

• 出版日期2013-8-18