Applications of the seismic attributes cube in the Cuu Long basin, offshore Vietnam

  • Nguyen Thu Huyen
  • Nguyen Trung Hieu
  • Tran Ngoc Minh
Keywords: -

Abstract

Seismic attributes are a powerful aid to seismic interpretation. They allow us to interprete faults and channels, recognise the depositional environment and unravel the structural deformation history more rapidly. This paper discusses several examples of seismic attributes as CTC and ESP from the Cuu Long basin offshore Vietnam.
Seismic coherency (CTC) is a measure of the similarity between seismic traces. Coherency data play an important role in the delineation of structural and stratigraphic features by enhancing the images seen on the conventional 3D seismic data. A coherency cube was utilised to enable a quick interpretation of the structural framework of an area of a block in the Cuu Long basin. In particular CTC attribute slices near the surface of basement, together with fault interpretation of seismic data, could indicate the presence of possible smaller localised faults the basement surface of C and VT structures.
Event Similarity Prediction (ESP) is a seismic discontinuity volume attribute. Seismic discontinuity attributes quantify the degree to which neighboring seismic traces vary from each other. They detect abrupt lateral changes in seismic data character caused by faults, diapirs and stratigraphy. ESP data were used to assist prediction of the distribution of faults/fractures zone inside the CNV basement area. These examples illustrate how CTC and ESP data can be used in exploration to improve the imaging of geological features.

References

M.S. Bahorich and S.L. Farmer. 3-D Seismic discontinuity: the coherency cube for faults and stratigraphic features. 64th annual international meeting, Society exploration geophysics, expanded abstract. 1994.

M.S. Bahorich and P. Van Bemmel. Stratigraphic interpretation of seismic data on the workstation. 64th annual international meeting, Society exploration geophysics, expanded abstract.

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Nguyen Quyet Thang. Cuu Long basin: key issues in petroleum exploration. Science - Technology Conference “30 years petroleum industry: new challenges and opportunities”. 2005; p. 388 - 407.

Nguyen Huy Ngoc. Application of seismic attributes to study reservoir distribution in block 01&02 Northesat Cuu Long basin. Science - Technology Conference “30 years petroleum industry: new challenges and opportunities”. 2005; p. 452 - 457.

Published
2013-10-31
How to Cite
Huyen, N. T., Hieu, N. T., & Minh, T. N. (2013). Applications of the seismic attributes cube in the Cuu Long basin, offshore Vietnam. Petrovietnam Journal, 10, 32-35. Retrieved from http://tapchidaukhi.vn/index.php/TCDK/article/view/709
Section
Articles

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