大港探区多层系潜山内幕油气成藏规律研究

Study on the regularity of hydrocarbon accumulation in the hidden buried hill of Dagang exploration area

大港探区潜山成藏条件复杂,历经五十余年勘探,一直以奥陶系深潜山为主要勘探对象,在千米桥、埕海等潜山取得突破,但受埋深及含硫化氢等因素制约,拓展勘探、效益增储难度大。积极转变观念,将埋藏浅、近油源、具多层系含油潜力的中高潜山作为勘探的重点,实现了突破,但成藏条件复杂,因此研究多层系潜山内幕油气成藏规律对指导下步勘探具有重要指导意义。

The conditions of formation of buried hill in Dagang exploration area are complex.After more than 50 years of exploration, ordovician buried hill has been taken as the main exploration object. Breakthroughs have been made in qianmiqiao, chenghai and other buried hill areas. However, due to factors such as buried depth and hydrogen sulfide, it is difficult to expand exploration and increase storage efficiency. By actively changing the concept and taking shallow buried, near-oil source and medium-high buried hill with multi-layer oil-bearing potential as the focal point of exploration, a breakthrough has been achieved, but the reservoir forming conditions are complex. Therefore, the study of the inner oil-gas accumulation rule of multi-layer buried hill has important guiding significance for the next step of exploration.