Reactivating Horizontal Wells in Carbonate Reservoir through Integration of Pressure Bore Hole Image Success Case of Greater Burgan Field

Mauddud Reservoir is characterized as low permeability with moderate to good porosity and variable fracture density. The reservoir can be subdivided into 2 units, lower unit been very tight and lack any oil stains, and upper unit which ranges from 5 to 10 feet of good oil column based on diagenesis process. Ideally horizontal wells were best option to exploit this thin reservoir, but production in Mauddud wells results varied a lot due to tight rock and low-pressure support. This decline is associated with high GOR, wells that shut in for some time reveal later to flow back to production. A study been carried out to review opportunities in over 20 horizontal wells to revive these wells thru integration of dynamic data with static data and utilizing latest new technologies in the industry. A thorough geological study integrating all the available data was carried out initially. Wells were screened for stimulation by using various proven new technologies. Acid Frac, multi Stage Frac, near wellbore acid-jet and Matrix Acid techniques have been applied with varying results. Advanced placement technique like distributed temperature profiling was used in some of the jobs.

This paper presents the details of the application of the above mentioned technologies, to the candidate wells and discusses the results. The success of some of these technologies opened up new opportunities for a new beginning to revive the closed wells completed in Mauddud Formation.