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区内古近系构造运动活跃,断裂发育,其中燕南断裂为本区的主干断层,具有控凹控带的作用。油气的分布与断层的期次、强度密切相关,整个构造单元的含油气高度受构造类型和构造高点控制,油气聚集程度依赖于断层两侧岩性不同和断层活动强弱的控制。本区油气成藏的有利区块被燕南断裂早期、中期发育的近东西向断层所控制,其构造高点是最为有利的聚集场所。
The Paleogene tectonic movement in the area is active and the faults developed. The Yannan fault is the main fault in this area, which has the function of controlling the concave zone. The distribution of oil and gas is closely related to the period and intensity of faults. The hydrocarbon-bearing height of the whole tectonic unit is controlled by the tectonic type and structural height. The degree of hydrocarbon accumulation depends on the control of lithology and fault activity on both sides of the fault. The favorable blocks of oil and gas accumulation in this area are controlled by the near-east-west fault developed in the early and mid-term of the Yannan fault, and the structural high point is the most favorable gathering place.