歧口凹陷港北多层系潜山内幕成藏条件分析

Analysis of reservoir forming conditions inside the multi-layer buried hill in Gangbei,Qikou sag

歧口凹陷北大港构造带经历区域勘探、区带勘探、兼探、低位潜山勘探、多层系内幕勘探五个阶段,由前期的低位潜山风化壳型碳酸盐岩为目的层,发现了千米桥潜山凝析气藏,但经济动用难度大,转变观念,优选近油源的港北多层系潜山内幕作为突破口,实施勘探,取得了突破,但成藏条件复杂,规律认识不清,拓展难度较大,因此对该地区开展成藏条件分析研究对下步勘探具有重要意义。

Beidagang structural belt,Qikou sag,it has gone through five stages of regional exploration, zone exploration,merger exploration,low buried hill exploration, multi-layer buried hill exploratiom from the previous low buried hill carbonate for the purpose of weathering crust type, discovered the Qianmiqiao buried hill condensate gas reservoir.But the economy difficult to use, therefore,in order to make breakthroughs, change the concept, optimization of oil source port north multi-layer system are similar as the breakthrough point, the implementation of exploration, have made a breakthrough. However, the reservoir-forming conditions are complex,unclear knowledge of the accumulation regularity, and it is difficult to expand,so in the region to carry out the accumulation conditions analysis and research of next exploration is of great significance.