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根据对海礁凸起地区的地质、地球物理和地球化学资料的分析 ,将海礁凸起划分为性质截然不同的南、北两个部分 ,推测南部海礁凸起尤其是东南翼具有较好的油气潜力。因为南部海礁凸起紧邻主要生油凹陷 (即西湖凹陷 ) ;储集性能较好的渐新统花港组可能在凸起的东南翼分布较厚 ;NWW向的深部断裂为南部海礁凸起区的断块圈闭、潜山和披覆构造的形成提供了条件 ,同时也起着油气运移通道的作用。从地化异常指标来看 ,该区油气运移的方向也是从 SE向到 NW向。因此 ,加大对南部海礁凸起的勘探力度 ,并重视南部凸起区可能具有的油气潜力 ,将有可能发现类似于流花 1 1 - 1、崖城 1 3- 1和绥中 36- 1的大型油气田。
Based on the analysis of the geologic, geophysical and geochemical data of the reef-raised areas, the reefs are divided into two parts of the south and the north with quite different characteristics. It is presumed that the reefs in southern China, especially the southeast The potential of oil and gas. Because the South China Sea Reef rises close to the main oil-producing depression (ie, the Xihu Sag), the Oligocene Huaxia Formation with better reservoir performance may be thickly distributed in the southeastern wing of the bulge, and the deep NWW-trending fault is the South China Sea Reef Fault block traps, burial hills and drape structures provide the conditions for the formation of the zone, but also play a role in the migration of oil and gas channels. From the geochemical anomaly indicators, the direction of hydrocarbon migration in this area is also from SE to NW. Therefore, it is probable that researches on Liuyang 11-1, Yacheng 1-3-1 and Suizhong 36-1 will be made more intensive on the exploration of the uplift of the southern reefs and on the possible hydrocarbon potential of the southern uplift areas Large oil and gas fields.