埕岛地区潜山油气藏特征

FEATURES OF BURIED HILL HYDROCARBON RESERVOIRS IN CHENGDAO AREA, SHANDONG

近几年 ,埕岛地区潜山勘探获重大进展 ,发现了太古宇、下古生界、上古生界、中生界等多层系的潜山油气藏 ;油气藏类型有风化壳型、屋脊断块型、潜山内幕型及地层不整合层状油气藏。对该区潜山地质结构、成藏条件分析表明 ,被古近系 (下第三系 )覆盖的埕岛潜山是油气聚集的主要单元之一 ,不同构造单元具有不同的油气分布特征 ,而储集条件控制了油气富集高产。潜山油气藏多与第三系油气藏上下叠置 ,形成复式油气藏。

In recent years, the exploration of the buried hill in the Chengdao oilfield has made important progress . Several buried hill hydrocarbon reservoirs, including Lower Paleozoic, Upper Paleozoic and Mesozoic, have been discovered in this area. These hydrocarbon reservoirs consist of weathering crust, ridge fault block, buried hill and stratigraphic unconformity stratified reservoirs. After analysing the geologic structure and pool forming conditions of the buried hill, the authors come to the conclution that the Chengdao buried hill under Eogene System is a main area of oil and gas accumulation, that different structural units have different features of oil and gas distribution, and that accumulation conditions determine the oil and gas enrichment. Most of buried hill reservoirs are superposed to form multiple oil and gas pools.