铁对酸化效果的影响探讨及控制铁酸液配方研究
发布时间：2018-11-08 07:01
【摘要】：针对高温碳酸岩储层酸化后返排液中铁离子含量较高的问题,建立了铁对酸化效果影响模拟评价方法,探索了铁离子对酸化效果的影响关系,注入铁离子质量浓度为1 500~5 000mg/L的酸液后,岩心渗透率降至初始渗透率的60%~67%。根据多基团桥接铁离子成为稳定物质的机理,研发了控制铁沉淀酸液体系,150℃、ρ(Fe)为5 000 mg/L时,酸反应至残酸(pH值3)后稳定铁4 650mg/L,残酸对岩心的伤害20%。
[Abstract]:In order to solve the problem of high iron ion content in acidified solution after acidification of carbonate reservoir at high temperature, a method of simulating and evaluating the effect of iron on acidizing effect was established, and the relationship between iron ion and acidizing effect was explored. The core permeability is reduced to 60% of the initial permeability after the implantation of acid solution with a mass concentration of 1 500 ~ 5 000mg/L. Based on the mechanism that iron ions are bridged by multi-groups to become stable substances, a ferric precipitated acid system was developed. At 150 鈩，
本文编号：2317731
[Abstract]:In order to solve the problem of high iron ion content in acidified solution after acidification of carbonate reservoir at high temperature, a method of simulating and evaluating the effect of iron on acidizing effect was established, and the relationship between iron ion and acidizing effect was explored. The core permeability is reduced to 60% of the initial permeability after the implantation of acid solution with a mass concentration of 1 500 ~ 5 000mg/L. Based on the mechanism that iron ions are bridged by multi-groups to become stable substances, a ferric precipitated acid system was developed. At 150 鈩，
本文编号：2317731
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