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几年来的勘探实践证明,渤海湾油区的二级构造带,大都与古潜山有关。这些以古潜山为主体的二级构造带,都是复合型的油气藏,也是目前渤海湾油区含油最富、产量最多、产能最高的二级构造带。据统计,在渤海湾油区已发现的二级构造带中,与古潜山有关的达百分之四十。潜山背斜构造所获得的储量,占总储量的百分之七十以上。有百分之六十的高产井都在潜山背斜构造上。为了研究潜山背斜构造的油藏分布规律,我们重点解剖了任丘、北大港、兴隆台、平方王四个潜山背斜带。发现这些潜山背斜构造不仅都是多种油藏的复合体,且各类油藏的分布都具有固定的位置与展布规律。(见图)现分述如下:
Exploration practice over the past few years has proved that the secondary structural belt in the Bohai Bay oil zone is mostly related to the buried hill. These secondary structural belts, mainly composed of buried hills, are complex types of oil and gas reservoirs. They are also the secondary oil-rich reservoirs with the most oil yield and the highest productivity in the Bohai Bay oil region. According to statistics, of the secondary structural belts that have been discovered in the Bohai Bay oil zone, up to 40% are related to buried hills. The buried hill anticline structure reserves obtained, accounting for more than 70% of the total reserves. Sixty percent of high-yield wells are in buried hill anticline structures. In order to study the distribution of buried hill anticline reservoirs, we focus on the four buried hill anticlines of Renqiu, Beidagang, Xinglongtai and Fangfangwang. It is found that these buried hill anticlines are not only the complex of many kinds of reservoirs, but also have a fixed position and distribution rule. (See figure) are as follows: