渤中34-9油田定向井完井液优选研究

渤中34某区块主要储层为东营组和沙河街组,属中孔中高渗特高渗砂岩油藏。根据其储层速敏、水敏、岩敏、碱敏和酸敏伤害特点,推荐定向井使用隐形酸完井液,并优化隐形酸螯合剂、黏土稳定剂及缓蚀剂加量,确定完井液配方。室内研究结果和现场应用效果表明,隐形酸完井液能有效溶解油层的堵塞物,提高油层渗透率和油井产量,对渤海油田增储上产具有重要指导意义。

Optimization of completion fluid system for Bozhong 34-9 oilfield directional well

The main producing position of Bozhong 34-9 oilfield is Dongying and Shahejie groups.It belongs to middle porosity,and middle-high&extra high permeability unconsolidated sandstone reservoir.According to the reservoir damage characteristics of speed sensitivity,water sensitivity,stone sensitivity,alkali sensitivity and acid sensitivity,we recommend to use implicit acid completion fluid for directional well and optimize the adding amounts of chelating agent,clay stabilizer and corrosion inhibitor,then determine the formulation.The results of laboratory study and field application show that the recessive acid completion fluid can effectively dissolve the stemming from the reservoir and improve reservoir permeability and oil well production,which have a vital significance for increasing storage and production.