Methods of assessing oil field saturation through use of reactive partitioning tracers
申请人:RESTRACK AS
公开号:US10351759B2
公开(公告)日:2019-07-16
A family of organic tracers is proposed for single well chemical tracer tests, for example for the measurement of residual oil in petroleum reservoirs. The tracers consist of at least one ester of (hydroxyalkyl) benzoic acid of formula (I), wherein at least one of R1 to R5 is a hydroxy alkyl group —R7—OH and each of the remaining R1 to R5 groups is independently selected from H, F, Cl, Br, I, CF3CF2Cl, CFCl2, CCl3 and at least one of these remaining R1 to R5 groups is not H, R6 is selected from CH3, C2H5, C3H7, C4H9, CF3, CH2CF3, CCl3, CH2CCl3, CH2CHCl2, CH2CH2Cl, CH2CF3, CH2CHF2, CH2CH2F, CH2CH2CH2F, CH2CH2CHF2, CH2CH2CF3, CH2CH2CH2Cl, CH2CH2CH—Cl2, CH2CH2CCl3, C3H6F, C3H5F2, C3H4F3, C3H6Cl, C3H5Cl2, C3H5Cl3 or a halogenated (hydroxymethyl)phenol and R7 is selected from CH2, C2H4, C3H6, C4H8.
提出了一系列有机示踪剂,用于单井化学示踪试验,例如用于测量石油储层中的残余油。示踪剂由至少一种式(I)的(羟基烷基)苯甲酸酯组成,其中 R1 至 R5 中至少有一个是羟基烷基-R7-OH,其余 R1 至 R5 基团中的每一个都独立地选自 H、F、Cl、Br、I、CF3CF2Cl、CFCl2、CCl3,且这些其余 R1 至 R5 基团中至少有一个不是 H、R6 选自 CH3、C2H5、C3H7、C4H9、CF3、CH2CF3、CCl3、CH2CCl3、CH2CHCl2、CH2CH2Cl、CH2CF3、CH2CHF2、CH2CH2F、CH2CH2CH2F、CH2CH2CHF2、CH2CH2CF3、CH2CH2CH2Cl、CH2CH2CH-Cl2、CH2CH2CCl3、C3H6F、C3H5F2、C3H4F3、C3H6Cl、C3H5Cl2、C3H5Cl3 或卤代(羟甲基)苯酚,R7 选自 CH2、C2H4、C3H6、C4H8。