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南襄盆地南阳凹陷受南部边界断裂控制,形成了南深北浅的箕状断陷,其构造演化划分为裂陷和坳陷两个时期,裂陷期构造活动形成了凹陷主要的构造面貌,自南而北可分为南部断超带、中部凹陷带和北部斜坡带。根据圈闭形态特征和成因,可分为4大类12小类。继承性构造运动形成了中部凹陷带鼻状构造群;断裂对圈闭和油气藏形成具有重要控制作用;北部坡折带控制了岩性油藏的形成与分布;差异沉降和后期不均衡抬升是南部断超带形成大套砂岩上倾尖灭圈闭(油藏)的主要因素。指出南部断超带、北部斜坡带隐蔽圈闭以及中部凹陷带构造-岩性复合圈闭是下步油气勘探值得重视的目标。
The Nanyang Sag in the Nanxiang Basin was controlled by the southern boundary faults and formed a shallow south-north and north-scale subsidence pattern. The tectonic evolution of the Nanyang Sag was divided into two periods: rifting and depression. During the rifting period, tectonic activities formed the main tectonic features of the depression, From south to north, it can be divided into southern fault zone, central depression zone and northern slope zone. According to traits and causes of traits, can be divided into four major categories 12 sub-categories. The successional tectonic movement formed a nose-shaped tectonic group in the central depression; the fault controlled traps and the formation of oil and gas reservoirs; the formation and distribution of lithologic reservoirs were controlled by the northern slope break; the differential settlement and the late imbalanced uplift were The southern fault zone formed a large set of sandstone updip trap (reservoir) of the main factors. It is pointed out that the next step is to pay more attention to the exploration of oil and gas in the south, the concealed trap in the northern slope and the tectonic-lithologic composite trap in the central depression.