南阳凹陷油气成藏主控因素及勘探潜力分析

南阳凹陷油气资源丰富,断裂发育,构造复杂,油气藏隐蔽,难以寻找,勘探开发难度越来越大。从构造运动、断裂、弯折带等方面入手,分析主控因素在油气成藏方面的作用,研究主要沉积体系的空间配置特征,指出凹陷南部控凹铲型正断层在非平面上滑动形成了北部弯折带,弯折带控制了北部体系域和沉积体系的时空展布,在廖庄组沉积之后,成藏期构造具有明显的控藏作用。在油气成藏主控因素分析基础上,认为北部弯折带和南部断超带具有较大勘探潜力。

Analysis on main control factors of oil-gas accumulation and exploration potential in Nanyang Sag

Nanyang sag has abundant hydrocarbon resources.Because of fault growing and complex structures,it is difficult to seek subtle reservoirs and exploration difficulty becomes bigger.According to tectonic movement,fault and bucking belt,it was carried out to study and analyze the function of main control factors of oil accumulation and dimensional allocation characteristics of the main depression system.It was the southern sag,which controlled share-shape centripetal fault,to slide in non-plane to form the northern bucking belt.The bucking belt controlled time-space distribution of northern system domain and depression system.After Liaozhuang unit deposited,the structure sharply controlled the reservoir.According to the analysis on main factors of oil accumulation,it is confirmed that the northern bucking belt and southern over-faulted belt have better exploration potential.