【摘要】：針對高溫碳酸巖儲層酸化后返排液中鐵離子含量較高的問題,建立了鐵對酸化效果影響模擬評價方法,探索了鐵離子對酸化效果的影響關(guān)系,注入鐵離子質(zhì)量濃度為1 500~5 000mg/L的酸液后,巖心滲透率降至初始滲透率的60%~67%。根據(jù)多基團(tuán)橋接鐵離子成為穩(wěn)定物質(zhì)的機(jī)理,研發(fā)了控制鐵沉淀酸液體系,150℃、ρ(Fe)為5 000 mg/L時,酸反應(yīng)至殘酸(pH值3)后穩(wěn)定鐵4 650mg/L,殘酸對巖心的傷害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，

本文編號：2317731