摘要
对于低矿化度地层水,浊流相沉积,岩性复杂,无统一油—水界面的砂泥岩地层,加上盐水泥浆钻井,虽然以岩心分析资料为基础,依岩石物理学的观点,应用统计方法确定岩性、物性、含油性与测井响应关系,进而求出孔隙度、渗透率、束缚水饱和度等地质参数,但是测井解释结论与试油结果比较,符合率仍低。本文除了采取以上方法外,主要求出完井测井时目的层的混合液电阻率,求得较合理的含油饱和度的数值,基本上解决了对盐水泥浆复杂砂岩储集层的评价问题。
This research deals with log interpretation of turbidite deposit shaly sand with low for-mation water salinities. continuing changin'g lithologies and multi-water-oil contacts drilledwith salt water mud. Although statistics were used from the view point of petrophysics to de-termine the relations between logging response and lithology, physical property and satura-tion, and porosity, permeability and irreducible water saturation were further derived, con-clusion of log interpretation didn't agree with test result. Thus a new method is proposed inthis paper. That is to derive a reasonable oil saturation through calculating primarily mixedfluid resistivity of the zone of interest incompletion log in addition to the prior method. Thisnew method basically solve the evaluation problem for complex sand with saltwater mud.
