渤海湾盆地胜海古2潜山古生界储层特征

胜海古2潜山是渤海湾盆地埕岛油田北部一个断块型潜山。为分析潜山油藏储层特征、实现潜山高效勘探开发,对胜海古2潜山地层特征、储集空间类型、储集空间特征、储层发育规律和控制因素进行了系统的研究。胜海古2潜山古生界储层主要为次生储集空间,包括晶间孔隙、溶蚀孔洞和裂缝等类型,其中裂缝是储层最重要的储集和渗流空间;胜海古2潜山储层主要发育在冶里一亮甲山组和风山组;潜山顶部地层和断层附近地层是良好的储层。以上研究结果表明:风化淋滤作用(风化壳)、岩性特征和断裂作用是控制储层发育程度的3个主要因素。这一结论对埕岛油田以及渤海湾盆地潜山勘探开发有借鉴作用。

RESERVOIR CHARACTERISTICS AND DEVELOPMENT OF SHENGHAI G2 BURIED HILL, BOHAI BAY BASIN

Shenghai G2 buried hill, a block buried hill, lies in the north of the Chengdao Oilfield, Bohai Bay basin. In order to analyze the reservoir characteristics and reshape the exploration and development of the buried hill, the authors studied systematically the stratum characteristics, storage space, reservoir development rules and controlling factors. The Paleozoic reservoir of Shenghai G2 mainly has secondary storage space, including intercrystal pore, dissolution aperture and fracture. Fracture is the main storage interspace among them. The main reservoir develops in the O1y-O1l and ∈3 f. Layers on the top of buried hill and near the fault are advantaged reservoirs. The research results show that the weathering process, lithological characteristics, and faulting are mainly factors controlling the development extent of reservoirs. The conclusion has reference function to the exploration and development of buried hill in Chengdao Oilfield and Bohai Bay basin.