东营凹陷高青—平方王潜山带油气藏类型及其成藏控制因素

Reservoir types and its controlling factors of Gaoqing-Pingfangwang buried hill belt in Jiyang depression

针对东营凹陷高青一平方王潜山带勘探程度低、难度大的特点,依据研究区潜山油气藏形态及成因的不同,将其归纳为3类:地层不整合潜山坡油气藏、断裂一不整合潜山风化壳油气藏和断裂潜山内幕油气藏,其中后2类勘探潜力较大。研究区潜山油气藏的成藏控制因素主要有油源条件、储层条件和断裂作用,因其成藏控制因素的差异,各类油气藏在潜山带中的发育部位具有一定的规律。地层不整合潜山坡油气藏主要分布在平方王潜山带的北翼斜坡;断裂一不整合潜山风化壳油气藏在高青一平方王潜山带均有分布,且主要位于相对较高的断棱部位;断裂潜山内幕油气藏主要分布在平南潜山。

According to Gaoqing-Pingfangwang buried hill belt in Jiyang depression characteristics of the difficulty and low degree of exploration,and based on the different forms and causes,we classify buried hill reservoirs into 3 categories in this paper:stratigraphic unconformity buried hillside reservoir,fracture-unconformity peak of buried hill reservoir and fracture inner buried hill reservoir,among which,the last two types are of high exploration potential.The main controlling factors of the buried hill reservoir are lithologic character,faulting and volcanic activity.The oil and gas reservoirs in buried hill belt with different controlling factors and developing position has certain degree of regularity.The stratigraphic unconformity buried hillside reservoir is mainly distributed in the north flank of Pingfangwang buried hill slopes;fracture inner buried hill reservoir is mainly distributed in Pingnan buried hill;fracture-unconformity peak of buried hill reservoir is widely distributed in Gaoqing-Pingfangwang buried hill belt,and reservoirs are distributed in relatively high fracture edges.