The Rakhine Basin, Myanmar offshore has remained unproductive for a long time. The discovery of biogenic gas in 2004 and the followed dry wells in 2007 have made the exploration in this area more complicated. 2D/3D seismic data newly acquired after 2007 has been interpreted, distributions of anticline structures and turbidite channels have been mapped. Combined with the newly drilled well data and the regional geological setting analysis, a model for hydrocarbon accumulation has been established. We show that under deep-water environment and due to the thick sedimentary volume, neither the turbidite channels, nor the anticline structures can accumulate hydrocarbon alone. Only if turbidite channels pass across the anticline structures, hydrocarbons from the deep sour rocks will migrate upward through conduits to the anticline traps and fill into the turbidite sands overhead to form hydrocarbon reservoirs. The intersections of the turbidite channels and the anticline structures should be the main targets for future gas exploration in the deep-water Rahkine Basin, offshore Myanmar.

缅甸近海的若开邦盆地长期以来一直处于低产状态。2004年生物气的发现和2007年随后的干井使该区勘探更加复杂。解释了2007年以后新采集的二维/三维地震资料，绘制了背斜构造和浊积水道的分布图。结合新钻井资料和区域地质背景分析，建立了油气成藏模型。我们表明，在深水环境下，由于沉积体积较厚，无论是浊流通道还是背斜构造都不能单独聚集油气。只有当浊流通道穿过背斜构造时，来自深层酸性岩石的碳氢化合物将通过管道向上运移至背斜圈闭，并填充到上方的浊积砂岩中，形成油气藏。浊积水道与背斜构造的交汇处应是未来缅甸近海若开盆地深水天然气勘探的主要目标。