表面活性剂降压增注技术现场应用效果分析

An Analysis on Field Application Effects of Surfactant Pressure Decreasing and Injection Increase Technique

为了改善江汉油田低渗透油藏的注水开发效果,2006—2007年进行了表面活性剂的单井降压增注试验。通过室内研究筛选,确定了现场试验用药剂为综合性能较好的JT202。现场应用后,配合酸增作业挤入表面活性剂段塞8口井,有效6口,措施有效率75%,日增注水量50m3,平均有效期235天,有两个井组对应油井明显见效。点滴注入3口井,其中1口井见效明显。

In order to improve the water injection development effects of low--permeability reservoirs in Jianghan Oil-field, the authors did the experiment of decreasing pressure and increasing injection by surfactant in a single well in the year 2006--2007. Through the indoor research and selection, they determine JT202 with better comprehensive performance as the agent for field experiments. After the field application, they pressed surfactant into eight wells along with acid increase operation. Six of them achieved effects, the measure efficiency reached seventy percent, the injected water was increased by fifty cubic meters daily, the average validity period was two hundred and thirty--five days, and the effects of corresponding wells of two well groups were obvious. Drops were injected into three wells, among which one had obvious effects.