Abstract
Abu Dhabi Oil Co., Ltd. (ADOC) is currently operating the following three oil fields; Mubarraz, Umm Al-Anbar (AR) and Neewat Al-Ghalan (GA) Field. A total of 73 wells have been drilled in our fields since MR-1 was drilled as a wild cat well in 1969. Furthermore, a total of 23 re-entry horizontal drilling operations from existing wells have been carried out, in order to increase the rate of oil production and oil recovery since 1996. Drilling operations have improved dramatically due to improvements in various aspects such as drilling technology, drilling mud technology and cementing technology which have contributed to more efficient and reliable drilling operations and subsequently better production history. This paper presents ADOC's drilling operation with an emphasis on re-entry horizontal drilling, including well trajectory, drilling assembly, drilling bit, drilling mud, re-entry method and running and cementing of the production liner.
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