惠州凹陷断裂特征及其对油气成藏的控制

The Faults in Huizhou Sag and Their Controls on the Petroleum Accumulation

对惠州凹陷断层的断距、延伸长度、断开层位、倾角和空间发育及分布特征进行了研究,将断层分为3个级别。分析了油气藏分布与断裂的关系后指出,二级断层对油气藏的控制作用最强,沿北西向断裂油气富集程度高,断距太大的断层不利于油气富集,晚期活动的断裂对油气成藏控制作用强。

The research on the development and distribution of the faults in Huizhou sag is conducted by changes of the slips, extensional length, horizons, dip angles of the faults, based on which three grades of the faults are given. The study shows that Grade-II faults have biggest controls on the petroleum accumulation, in which higher enrichment of it could be found along NW faults, but those with too big slips of faults couldn＇t help the accumulation. The late active faults have bigger controls on the petroleum accumulation in this area.