注入水中乳化油滴对储层伤害的实验研究

对于油田注水或污水回注系统,注入水中含油量是注入水水质指标中重要的控制指标之一,也是引起注水地层吸水能力下降的主要因素,如何结合具体储层确定出相适应的含油量指标,一直是注水开发油田水质标准制定工作的难点。利用正交实验原理,首次较为系统地评价了注入水水中乳化油滴对中低渗砂岩储层的伤害特征,获得了大量有益的结论,对于充分认识注入水水中乳化油滴对储层的堵塞规律、制定合理的水质指标以及如何减少乳化油滴的伤害具有重要指导意义。

EXPERIMENTAL STUDY ON FORMATION DAMAGE CAUSED BY EMULSIFIED OIL DROPLETS DURING WATER INJECTION

The oil content is one of the primary specifications of water quality control in produced water re-injection and conventional oilfield water treatments. It also mainly contributes to the decline of water receptivity of the injected formation especially in water re-injection system. It is very difficult that how to determine reasonable oil content corresponding to specified formation whenever constituting water quality standard in water flooding oilfield. In this paper,the damage characteristics of emulsified oil droplets on core flowing efficiency were effectively assessed in the first time by involving orthogonal experiment design method, and lots of useful conclusions were also obtained. It has important guidable significance in understanding reasonable water quality standard and coming up with good ideas to cease this kind of formation damage in oilfield.