超高压注水井解堵增注技术的研究与应用

The Research and Applica tion of Block Removing by Strong Oxidizer

 封永利

Feng Yongli

 胜利油田有限公司现河采油厂

Xianhe Oil Production Plant, Shengli Oilfield Co1L td1, S INOPEC, Dongying 257068, China

 　 超高压注水井由于压力条件的变化引起渗流介质的变化,机杂及菌类混合堵塞严重,解堵工作难度增大。针对常规酸化不能有效解除有机类堵塞,并结合现河油区高压低渗透油藏井深,地层温度高,存在水敏、酸敏的特点,开展了广泛调研,在二氧化氯强氧化解堵技术室内实验的基础上,研究出适宜现河油区高压低渗透油藏特点和储层伤害特点的强氧化解堵技术,用于超高压注水井的增注工作,取得了十分显著的效果。

In superhigh p ressure injection well, it becomes more
difficult to break down block resulting from the changing of
flow through porousmedia caused by the changing of p ressure
condition, and heavily accumulating mechanical impurities
and bacterial p lugging as well. In terms of the following
characters, low permeability, deep-buried formation, high
formation temperature, water sensitivity and acid sensitivity,
widely research has been imp lemented on ineffectively organic
p lug removing by conventional acidizing. On the base of
technology block removing by ClO2 , the technology of block
removing by strong oxidizer is developed to app ly in low
permeable reservoir in Xianhe oil p lant, which has been
p roved to be more effective.