Application of seismic attributes to delineate the geological features of the Malay Basin


Author : Abd AlSalam Almasgari et al.Publication : Bulletin of the Geological Society of MalaysiaNumber : 69Page : 97 - 110Year : May 2020DOI : doi.org/10.7186/bgsm69202009


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Bulletin of the Geological Society of Malaysia, Volume 69, May 2020, pp. 97 - 110

Application of seismic attributes to delineate the geological features of the Malay Basin

Abd AlSalam Almasgari1,2,*, Mohamed Elsaadany1, Abdul Halim Abdul Latiff1, Maman Hermana1, Abdul Hadi Bin Abd Rahman1, Ismailalwali Babikir1, Qazi Sohail Imran1, Nicholas Fogne Appiah1, Teslim Oyediran Adeleke1

1 Center of Excellence in Subsurface Seismic Imaging and Hydrocarbon Prediction,
Department of Geosciences, Universiti Teknologi Petronas, 32610 Bandar Seri Iskandar, Perak, Malaysia
2 Department of Environment and Geology, Thamar University, Yemen
* Corresponding author email address: abd_16005741@utp.edu.my

Abstract: The Melor-field of the Malay basin has been investigated using several seismic attributes to present the geological elements accurately. This study used a new seismic attribute to represent the geological features of the study interval. Besides, the application of some seismic attributes was applied to reveal the structural and geomorphological features of the Melor-field. The limited available wells (Melor-Well-1 & Melor-well-2) in the study area resulted in high uncertainty regarding petrophysical parameters, particularly in net sand distribution, while the western and eastern parts did not have any well control. Considerable heterogeneity was evidenced in the reservoir quality between the reservoir encountered in Melor-1 and Melor-2 Wells. Three-dimensional geological modeling was utilized in this study to integrate the geological and 3D seismic results with the well logs and seismic attributes to address the above uncertainties. This helps to estimate the reservoir properties for the distances away from the wellbore. The results showed that the fields of the Malay basin are dominated by semi-flattened depositional sequences with heterolithic interbedding associated with a high degree of vertical heterogeneity. The systems tract has been evaluated, although the study area was very complicated. A new method consisting of multi-seismic attributes, thoroughly picked horizons, well logs, and seismic data, which has been used in this research to establish a reliable sequence stratigraphy and system tract framework. Seismic sequence stratigraphy spectral analysis is a new attribute used to represent a 3D visualization of the studied interval. The original amplitude, coherence, and spectral decomposition have been utilized to display the geological features hidden in the seismic data. These attributes are based on the properties of the seismic data, which itself is the result of relevant geological phenomena. The results of this research can be a wide-based reference for further studies in this area.

Keywords: Seismic attribute, geological features, sequence stratigraphy, systems tract, Malay Basin

DOI: https://doi.org/10.7186/bgsm69202009