高北隐蔽油气藏特征及勘探方法

CHARACTERISTICS OF GAOBEI SUBTLE HYDROCARBON RESERVOIR AND EXPLORATION METHOD

王旭东 卢桂香

Wang Xudong Lu Guixiang

高北隐蔽油气藏位于南堡凹陷高尚堡潜山北翼。过去一直认为该油藏为受断层控制的构造油气藏。但通过对骨架砂岩厚度和物源方向重新分析后发现,该油藏为“泥包砂”型,是典型构造背景下的岩性油气藏。油气藏具有初期产能高,后期递减快的特征。该油气藏的勘探过程表明在寻找隐蔽油气藏时,应从储层沉积微相研究入手,对储层进行地震反演,利用综合分析结果确定油气藏类型。

Gaobei subtle hydrocarbon reservoir is situated in northern flank of Gaoshangpu buried hill of Nanpu depression. The reservoir was formerly considered to be a structural hydrocarbon reservoir controlled by the fault.It is discovered by re-analyzing thickness of the skeletal sandstone and orientation of material sources that the reservoir is a type,composed of "sand wrapped by mud",of litho-reservoir against structural background with feature of high production of energy initially and degrading quickly late on.Exploration process for the reservoir indicates that a thorough study of micro-sedimentary phase of reservoir shall be emphasized in the first place when searching for subtle hydrocarbon reservoir,restoring the reservoir by means of seismic inversion,defining the type of hydrocarbon reservoir by studying on comprehensive analysis results.

10.11743/ogg20020216