Paleogene sediment complex - Geological factors impacting on its reservoir quality and hydrocarbon potential

  • Ngo Thuong San
  • Cu Minh Hoang
  • Phung Khac Hoan
Keywords: -

Abstract

The Paleogene reservoir complex has diverse facies which change rapidly in lateral and vertical direction. Its depositional environment is determined as alluvial, deltaic and tidally affected lacustrine, and rarely with shoreline facies. The variety in sedimentary facies and lithological heterogeneity are the main causes for the anisotropy in porosity and permeability of the Paleogene reservoirs, reducing field exploration and development efficiency as well as the application of secondary exploitation in order to increase the oil recovery.
Reservoir quality is resulted from the combined effects of primary diagenetic elements and secondary alteration. The secondary deformation has bidirectional influence on the reservoir quality, reducing the primary porosity and forming the secondary porosity as well. The dual porosity is one of the important properties of the Paleogene reservoir that should be considered in production management.
Secondary fractures could potentially increase the flow in the tight Paleogene reservoirs.
The production from Paleogene reservoir is still small, not corresponding to the potential of Paleogene formation as rich source rock. The Late Eocene-Oligocene reservoir, therefore, needs to be investigated and sufficiently evaluated as a potential hydrocarbon bearing play in order to enhance production and reserves.

References

Ngô Xuân Vinh. Những yếu tố chính ảnh hưởng đến tính chất thấm chứa của đá vụn lục nguyên Miocen - Oligocen bể Cửu Long. Hội nghị Khoa học - Công nghệ Tổng công ty Dầu khí Việt Nam. 2000.

Ngô Thường San, Cù Minh Hoàng. Chất lượng tầng chứa Paleogen bể Cửu Long. Tuyển tập Báo cáo Hội nghị Khoa học - Công nghệ 30 năm thành lập Viện Dầu khí Việt Nam. Nhà xuất bản Khoa học - Kỹ thuật. 2008.

Tập đoàn Dầu khí Việt Nam. Địa chất và Tài nguyên Dầu khí Việt Nam. 2007.

Published
2013-08-30
How to Cite
San, N. T., Hoang, C. M., & Hoan, P. K. (2013). Paleogene sediment complex - Geological factors impacting on its reservoir quality and hydrocarbon potential. Petrovietnam Journal, 8, 10-18. Retrieved from http://pvj.vn/index.php/TCDK/article/view/693
Section
Articles