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摘要和引言加利福尼亚进行二次和强化采油(EOR)作业的储集层是典型的中到高孔隙度地层,其地层水由淡至微咸分布。在这些条件下,脉冲中子测井(如连续碳/氧比测井)是监视扫油和洗油效率、确定液体和气体穿透情况、评价残余油饱和度(ROS)的有效手段。在西得克萨斯,碳/氧(C/O)比测井有助于重新评价区域枯竭层储量和探测那些盛产油区老井中的死油。这里给出了现场测井实例,其中包括对耶茨(Yates)组、七河(Seven Rivers)组、奎因(Queen)组、格雷勃哥(Grayburg)组、圣安德烈斯(San Andres)组、格洛瑞特(Glorieta)组和克莱尔福克(Clearfork)组地层的相继试油结果。
Abstract and Introduction The reservoirs for secondary and enhanced oil recovery (EOR) operations in California are typical medium- to high-porosity formations whose distribution of water varies from light to slightly salty. Under these conditions, pulsed neutron logging, such as continuous carbon / oxygen ratio logging, is an effective means of monitoring residual oil saturation (ROS) by monitoring sweep and wash efficiencies, determining fluid and gas breakthrough. In West Texas, a C / O log helps reassess regional depleted bed reserves and detect dead oil in older wells that are rich in oil. Here are examples of in-situ logging, including the Yates, Seven Rivers, Queen, Grayburg, San Andres ) Group, the Glorieta group and the Clearfork formation.