The Paleozoic reservoir at Kashagan field is characterized by a relatively porous carbonate platform interior surrounded by a highly-cemented margin called the rim. Most of the faults and fractures are concentrated near the rim. Despite low matrix porosity and permeability, rim wells experience lost circulation, bit drops, and high Kh, suggesting a well-developed secondary porosity system. Understanding the role of fractures in this secondary porosity system will be key to reservoir quality prediction. At the seismic scale, faults commonly strike parallel to the rim boundary. At the borehole-scale, image logs also show a fracture set striking parallel to the rim, with secondary sets at high angles to the rim. Rim parallel features are consistent with their formation during early syndepositional margin collapse and differential compaction of the platform and rim.


Article metrics loading...

Loading full text...

Full text 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