低渗油田注水过程中储层保护技术研究

Study on reservoir protection technology during water injection of low permeability oilfield

朱德武 刘文臣 朱正刚

1.中国石油化工股份有限公司石油勘探开发研究院德州石油钻井研究所，山东 德州253005;2.中国矿业大学资源与安全工程学院，北京 100083

Dezhou PetroleumDrilling Research Institute, Research Institute of Petroleumexploration and development,
SINOPEC, Dezhou 253005, China

低渗油田注水过程中储层保护的关键是保护孔喉。以张天渠低渗油田为例，对储层敏感性和注入水水质进行评价，对储层伤害的内部潜在因素和外部诱发因素进行分析，诊断出储层损害的主要因素有水敏、速敏，注入水中固相颗粒堵塞及结垢堵塞，同时存在细菌堵塞、腐蚀物堵塞的可能。根据储层堵塞伤害原因，选择综合保护技术措施。

The key of reservoir protection is the protection of the pore throats during water injection in low permeability oilfields.The
reservoir sensitivity and the injected water quality are assessed, taking the low permeability oilfield in Zhangtianqu as example.
Meanwhile, the interior latent factors and exterior inducing factors of formation damage are analyzed. The main factors of formation
damage include the water sensitivity, velocity sensitivity, solid particles blocking in injected-water and scale blocking. At the same
time, the bacteria or corrosions object blocking are probable too. The integrated protection technology and measures are selected in
terms of the reasons of formation damage.