Selection and application of new bit for Oligocene sequence with high density drilling fluid for development wells, Northeast area of the Bach Ho field

  • Dang Cua Vietsovpetro Joint Venture
  • Bui Le Trong Hoa Vietsovpetro Joint Venture
  • Ta Ngoc Anh Vietsovpetro Joint Venture
  • Ta Van Thinh Vietsovpetro Joint Venture
  • Nguyen Van Cuong Vietsovpetro Joint Venture
DOI: https://doi.org/10.47800/PVSI.2024.03-07
Keywords: Drill bit, casing structure, geology, Oligocene, plastic shale, Northeast Bach Ho

Abstract

In the Northeast area of the Bach Ho Field, when drilling through the Oligocene sequence of the Ф215.9 mm drilling section of several wells in the area, polycrystalline diamond compact (PDC) drill bits typically achieve drilling speeds of 2 - 5 m/h, resulting in relatively low productivity and efficiency due to increased drilling time and cost.

The use of the new PDC Hyperblade Y519 bit for the Ф215.9 mm drilling section through the Oligocene formation, which is characterized mainly by plastic shale tending to swell upon contact with water, has optimized the drilling rate, reaching an average of 16 meters per hour for a total drilled depth of 1967 m across wells 2202 and 2207 BK-22.

The article introduces a study on the use of a new PDC bit to drill through the Oligocene layer with high-density drilling fluid in the northeastern area of the Bach Ho field. Based on this, the method can be applied to similar formations in the Bach Ho, Rong fields, and surrounding areas to enhance drilling efficiency and optimize well costs.

References

Đặng Của và Nguyễn Thành Trường, “Liên doanh dầu khí “Vietsovpetro” sử dụng choòng khoan kim cương đa tinh thể (PDC) ở xí nghiệp liên doanh dầu khí “Vietsovpetro””, Địa lý địa chất môi trường, 1996.

Vietsovpetro, "Thiết kế giếng khoan, báo cáo kết thúc giếng khoan, báo cáo khoan hằng ngày của tất cả các giếng đã khoan ở khu vực Đông Bắc mỏ Bạch Hổ VSP".

Schlumberger, “Tài liệu giới thiệu liên quan đến choòng PDC HyperBlade”.

Published
2024-09-17
How to Cite
Dang, C., Le Trong Hoa, Ngoc Anh, Ta Ngoc Anh, V. T., & Van Cuong. (2024). Selection and application of new bit for Oligocene sequence with high density drilling fluid for development wells, Northeast area of the Bach Ho field. Petrovietnam Journal, (3), 66-72. https://doi.org/10.47800/PVSI.2024.03-07
Issue
No 3 (2024): Petrovietnam Special Issue - Science, technology & Innovation
Section
Articles

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