New Approach of Reservoir Mapping-While-Drilling Technology To Avoid Pilot Hole in Horizontal Drilling Application
- G. Gouda (Eni Egypt) | M. Kaja (Eni Egypt) | S. Abdel Fattah (Petrobel) | E. Shaker (Petrobel) | W. Abd ElHakim (Petrobel) | M. Korany (Petrobel) | E. Samir (Schlumberger) | A. Metwally (Schlumberger)
- Document ID
- Offshore Mediterranean Conference
- Offshore Mediterranean Conference and Exhibition, 29-31 March, Ravenna, Italy
- Publication Date
- Document Type
- Conference Paper
- 2017. Offshore Mediterranean Conference
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Abu Rudeis Field is considered one of the oldest oil fields in the Gulf of Suez, Egypt, producing since 1957. Most of the oil production comes from the Nukhul sand, which resulted in the depletion of this zone. The depletion of the Nukhul sand creates a challenge for the drilling engineering in terms of the optimum well design and the drilling methodology to implement, which would help reduce the drilling costs and ensures smooth drilling operation for early production. The focus of this paper will be on the ARM block in the Abu Rudeis Field where recent field studies has shown that better production rates can be achieved from drilling horizontal wells as compared to drilling deviated wells. Four horizontal wells were drilled in the ARM block and for all four wells; a pilot hole was drilled in order to determine the unconformable top of Nukhul Sand Formation. The pilot holes that were used to determine the sand top was then plugged and abandoned and side-tracks were drilled for a build-up section whose casing point selection was made based on the pilot hole data. Failure to set casing at the top of the reservoir sand would result in complete mud circulation losses due to the difference in pore pressure between the depleted sand and the pressurized shale above it. The analysis of the nonproductive time including the pilot hole cost, the sticking pipe risk and the possible oil based mud losses ranged +/- 1.8 M$.
This paper highlights the engineering solution and the technology usage of the first reservoir mapping while drilling service in Egypt to land a horizontal well with proactive detection of the casing point in order to eliminate the nonproductive time associated with drilling pilot holes. The main objective is to continue drilling more horizontal wells in order to increase the oil production from the field.
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