Case Histories of Successful Conformance Control Treatments in the Gulf of Suez, Egypt

By

Arshad Waheed¹, Naz Gazi²

(1) Halliburton, Egypt, Cairo, Egypt (2) Halliburton, Dubai, Dubai, United Arab Emirates

 Every field is unique in its response to conformance control treatments. In the Gulf Of Suez (GOS) a couple of conformance jobs were successfully completed. This paper presents two case histories involving a water shut-off treatment in an oil producing well and an injection profile modification treatment on a water injection well.

A new, organically cross-linked polymer system was used to obtain deep penetration that could sustain long term results in these GOS wells. The job design phase included modeling of reservoir cool-down to optimize polymer gel times and gel strengths. Appropriate placement techniques and key modifications in the traditional conformance control program were implemented to achieve very successful results following the treatments.

In the oil producing well, water production of over 3000 bpd was shut off and an incremental oil production of over 680 bpd is being realized from the treated zones. The incremental oil reserve from this production is 1.5 million barrels.

The results from the treatment of the injection well showed a remarkable improvement in the water injection profile of the subject well. Prior to the treatment 10% of the perforations took about 47% of the injected fluid, and the rest of the fluid was distributed over 90% of the perforations. After the treatment the same 10% of the over-swept perforations took only 5% of the total injected fluid and 95% of the fluid went to 90% of the perforations.

Several lessons were learnt from these treatments. This paper details the key factors that allowed these jobs to be successful.