| Author's Name: Tang Pengcheng，Shao Dali, Wang Haiqiang, Wang Hongping, Sun Hui, Zhang Yonggang, Ma Hongxia, Ding Liangbo |
| Institution: PetroChina Hangzhou Institute of Geology |
| Abstract: |
| Based on recent drilling and 2D/3D seismic data, the late Cenozoic deformation of Arakan fold belt and its control on hydrocarbon accumulation was investigated in offshore Rahkine, Bay of Bengal. The analysis result shows that only a basal detachment fault (10km of burial depth) develops in the southern part of the study area while a basal detachment fault (12km deep buried) and a middle detachment fault (4km deep) develop in the northern part. Under the control of these detachment faults, one set of tectonic layers develops in the southern part and two sets of layers (the upper and the lower one) in the northern part, respectively. The lateral extended distance, the wave length and the interval distance between anticlines are longer obviously in the southern part than those in the northern part. In addition, both the NS-trending anticline and the secondary NE-trending transtensional dextral strike-slip fault formed in the upper tectonic layer in northern part. According to growth strata records, these deformations formed in late Quaternary and at the end of late Quaternary respectively. Trap formation, hydrocarbon migration and accumulation conditions are greatly controlled by the late Cenozoic deformation. It is suggested that the structural-lithologic composite traps have the condition to form large gas fields in the gentle fold belt and the southern part of the study area is the favorable exploration targets in the future. |
| Keywords: Late Cenozoic; Structural characteristics; Hydrocarbon accumulation; Arakan fold belt; Bay of Bengal |
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投稿时间：
2015-01-12 |
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