1887

Abstract

The fracture gradient is the upper boundary for the annular mud pressure while drilling and is one important parameter for<br>wellbore integrity. Its calibration using reliable data such as Leak-off-Tests (LOT) and events such as mud losses is essential<br>and can save the operators large amounts of money. Mud losses are often encountered when the annular pressure exceeds the<br>fracture gradient. Such an event can thus be useful to re-calibrate the fracture gradient in real-time in order to circumvent<br>additional losses while continuing drilling. However, analysis of causes for losses and the resulting delivery of proper<br>calibration data have rarely been reported in the past. In most cases, losses were analyzed after drilling, and the information<br>gained from this analysis has been used to plan future wells.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609-pdb.151.iptc13831
2009-12-07
2020-09-26
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.151.iptc13831
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error