油溶性暂堵剂OSR-1的研究

暂堵酸化工艺可解决油井酸化时地层非均质性所暴露出的问题,提高酸化效果。这就要求油溶性暂堵剂:(1)制粒性好,粒度分布宽;(2)配伍性好,在水、酸、表面活性剂中表现为惰性;(3)产品的耐温性要好,以适应井底高温。论述了OSR-1的理化性能、屏蔽式暂堵分流作用及其现场应用的部分情况。试验表明OSR-1是一种较好的油溶性暂堵剂,适用于常规酸化,尤其适用于多层非均质的储层,能起到多层均匀改善、增加出油层段、提高酸化效果的作用,并对油井出水具有一定的抑制作用。

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.