RESEARCH OF OIL SOLUBLE TEMPORARY PLUGGING AGENT OSR-1

The temporary plugging and acidizing technology can be used to solve the problems caused formation heterogeneity during acidizing of oil wells,and improve the effect of acidizing. This paper presents the requirements to the oil soluble temporary-plugging agent:1)Granulation should be good,the range of grain size should be wide. (2) Compatibility should be good,it should show as inert in water,acid and surfactant. (3) Temperature tolerance should be good,so as to be suitable for the high bottom hole temperature. This paper demonstrates the physical and chemical property,the shielded temporary plugging fractional flow action and the field application of OSR-1. The test indicates that OSR-1 is a good on soluble temporary plugging agent,suitable for conventional acidizing,especially suitable for multi-layer heterogeneous reservoir. It can improve evenly the property of several layers,increase the number of oil producing intervals,improve the effect of acidizing,and play a certain role in inhibiting water producing from oil well.