Seismic Interpretation of the Nam Con Son Basin and its Implication for the Tectonic Evolution

Abstract

-The Nam Con Son Basin covering an area of circa 110,000 km 2 is characterized by complex tectonic settings of the basin which has not fully been understood. Multiple faults allowed favourable migration passageways for hydrocarbons to go in and out of traps. Despite a large amount of newly acquired seismic and well data there is no significant update on the tectonic evolution and history of the basin development. In this study, the vast amount of seismic and well data were integrated and reinterpreted to define the key structural events in the Nam Con Son Basin. The results show that the basin has undergone two extentional phases. The first N -S extensional phase terminated at around 30 M.a. forming E -W trending grabens which are complicated by multiple half grabens filled by Lower Oligocene sediments. These grabens were reactivated during the second NW -SE extension (Middle Miocene), that resulted from the progressive propagation of NE-SW listric fault from the middle part of the grabens to the margins, and the large scale building up of roll-over structure. Further to the SW, the faults of the second extentional phase turn to NNE-SSW and ultimately N -S in the SW edge of the basin. Most of the fault systems were inactive by Upper Miocene except for the N -S fault system which is still active until recent time.

An Innovative Seismo-Petrophysical Characterization of a Turbidite Sand in the Nam Con Son Basin, Using Permeability-Linked Adapted Rock Physics Template (K-Arpt) with Reference to Gas Exploration and Carbon Storage

“…The development of NCSB is closely linked to the regional crustal extension that began in the Early Tertiary across Southeast Asia due to the sea floor spreading in the East Vietnam Sea (EVS), also known as the South China Sea (SCS). The rifting evolution of the Nam Con Son Basin has been described in various publications, e.g., Briais et al (1993); Matthews et al (1997); Franke et al (2014); Tuan and Tri (2016); PetroVietnam (2017); Dung et al (2018); Phong et al (2018);and VPI (2019). The rifting stages of NCSB are shown in Fig.…”

Hydraulic Flow Unit Classification and Prediction Using Machine Learning Techniques: A Case Study from the Nam Con Son Basin, Offshore Vietnam

“…The post rift section during the late Miocene is marked by thermal sag and the deposition of the Mekong Delta sediments into the NCSB. This resulted in thermal maturation of the deeper section [26,27].…”

Application of Seismuc Attribute Analysis to Reserch the Distribution of Middle Miocene Coral Reef Carbonate in Block 04-3, Nam Con Son Basin

“…Địa chỉ email: phuongthao298@gmail.com https://doi.org/10.25073/2588-1094/vnuees.4647 trọng của Tập đoàn Dầu khí Việt Nam [1][2][3][4]. Bể Nam Côn Sơn được hình thành theo cơ chế tách giãn, trải qua lịch sử hình thành và phát triển địa chất khá phức tạp, thể hiện qua các đặc trưng cấu trúc địa chất cũng như đặc điểm thạch học của bể [4][5][6].…”