Alaskan North Slope Oils and Source Rocks

1985 ◽  
pp. 85-94
Keyword(s):  
Source Rocks ◽  
North Slope ◽  
Alaskan North Slope

Underbalanced Drilling with Coiled Tubing: A Case Study on the Alaskan North Slope, Which Proves the Benefits of Drilling a Straight Hole

2021 ◽  
Author(s):  
Antoni Miszewski ◽  
Adam Miszewski ◽  
Richard Stevens ◽  
Matteo Gemignani
Keyword(s):  
Relative Effectiveness ◽  
Shallow Depth ◽  
North Slope ◽  
Coiled Tubing ◽  
The North ◽  
North Slope Of Alaska ◽  
Minimum Requirements ◽  
Bottom Hole Assembly ◽  
Alaskan North Slope ◽  
Future Work

Abstract A set of 5 wells were to be drilled with directional Coiled Tubing Drilling (CTD) on the North Slope of Alaska. The particular challenges of these wells were the fact that the desired laterals were targeted to be at least 6000ft long, at a shallow depth. Almost twice the length of laterals that are regularly drilled at deeper depths. The shallow depth meant that 2 of the 5 wells involved a casing exit through 3 casings which had never been attempted before. After drilling, the wells were completed with a slotted liner, run on coiled tubing. This required a very smooth and straight wellbore so that the liner could be run as far as the lateral had been drilled. Various methods were considered to increase lateral reach, including, running an extended reach tool, using friction reducer, increasing the coiled tubing size and using a drilling Bottom Hole Assembly (BHA) that could drill a very straight well path. All of these options were modelled with tubing forces software, and their relative effectiveness was evaluated. The drilling field results easily exceeded the minimum requirements for success. This project demonstrated record breaking lateral lengths, a record length of liner run on coiled tubing in a single run, and a triple casing exit. The data gained from this project can be used to fine-tune the modelling for future work of a similar nature.

Response Plans for Arctic Oil and Ice Encounters

1999 ◽  
Vol 1999 (1) ◽  
pp. 639-646 ◽  
Author(s):  
Nick W. Glover ◽  
David F. Dickins
Keyword(s):  
Open Water ◽  
North Slope ◽  
Action Plans ◽  
Response Strategies ◽  
Arctic Conditions ◽  
Oil Spill Response ◽  
Ice Conditions ◽  
Ground Truthing ◽  
And Behavior ◽  
Alaskan North Slope

ABSTRACT Ice conditions, in dynamic stages of development and degradation, are present for over 280 days out of every calendar year in the Beaufort Sea adjacent to the operating oilfields on the Alaskan North Slope. Additionally, wind driven ice invasions during the open water season, July through September typically, may also occur for short periods throughout the season. This presence combined with extreme arctic conditions routinely presents a challenge to mounting a safe and effective oil spill response action. In order to overcome this challenge responders must develop response action plans not only with an understanding of the physical environment but also with a basic understanding of the effect this environment will have on the fate and behavior of the spilled oil. Arctic spill response strategies, worldwide, have been developed through years of experience with both offshore and onshore drilling and production operations in all types of sea and ice conditions. North Slope response action plans are based on this experience, intense field training, and ground truthing of related research and development projects.

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