珠一坳陷断层特征及对油气成藏的作用

The Effect of Fault Zone Characteristics of Zhu 1 Depression on Hydrocarbon Accumulation

通过综合分析,明确了珠一坳陷存在3种类型断层:早期断层、长期活动断层和晚期断层,提出了断层演化的3个阶段:断陷期、宁静期和活化期,论证了长期活动断层及大部分晚期断层是新近系油气成藏的油源断层,进而建议在新近系寻找油气藏应重视长期活动断层和晚期断层发育区,而在古近系寻找油气藏应重视早期断层发育区。

Three types of fault zones including early fault zone,long term growth fault zone and late fault zone were identified in Zhu 1 Depression of Pearl-river Mouth Basin through comprehensive study.It is proposed that there exist three evolutional stages including fault depression period,quiet period and active period in fault evolutionary history.It is demon strated that long term growth faults and the most of late faults are Neogene oil source fault for reservoirs,where I long term growth faults and late faults should be emphasized for Neogene oil exploration of and I early faults should be emphasized for Paleogene oil exploration.