In the southwest and west parts of the Nansha Waters, the Paleogene sediments have suffered from strike-slipping extension and compression, and are comprised of the main oil source rocks in numerous large traps over the area.
In the southwest and west parts of the Nansha Waters, the Paleogene sediments have suffered from strike-slipping extension and compression, and are comprised of the main oil source rocks in numerous large traps over the area.
南沙西南及西部的下第三系受到走滑、拉张和挤压的影响，构造复杂，圈闭多，规模大，是主要的生油和储集岩层。