| 摘要 |
A method is proposed for inter-well measurement of pH in petroleum reservoirs, as is the use of certain pH-dependent partitioning tracers in such methods. The tracers consist of a substituted phenol of formula (i), wherein each of R1 to R5 is independently selected from H, F, CI, Br, I, CF3 CF2CI, CFCI2, CCI3, OCH3, OC2H5, CHO, CN and NO2 and wherein at least one of R1 to R5 is not H |
