延长主力油层泡沫水泥堵剂体系配方优化与性能研究

针对延长石油主力油层油井堵水及井壁再造问题,对泡沫水泥体系中发泡剂、稳泡剂、水灰比、缓凝剂、木纤维等添加剂进行了室内优化实验,确定了适合延长石油主力油层油井堵水的泡沫水泥浆体系配方:G级油井水泥浆体系为:0.5%AES+0.3%CMC+G级油井水泥浆(水灰比为0.44~0.55)+0.2%缓凝剂+0.2%木纤维;800目超细水泥浆体系为:0.5%AES+0.3%CMC+800目超细水泥浆(水灰比为0.55~0.60)+0.2%缓凝剂+0.2%木纤维。并对优化后的泡沫水泥浆体系进行了动态封堵性能评价实验。实验结果显示,优化后的泡沫水泥体系具有较强的封堵调剖能力以及封堵的稳定性。

The formula optimization and performance research of foamed cement plugging agent system in Yan Chang the major oil reservoir

Aiming at oil well water plugging and borehole wall reengineering problems of Yan Chang oil major reservoir, The indoor optimization experiments of foaming agent, stabilizing agent, water to cement ratio, retarder, wood fiber and other additives for the foamed cement system were carried on, The foamed cement slurry system formula that was suitable for Yan Chang oil major reservoir oil well water shutoff was determined: G graft oil well cement slurry system: 0.5% AES + 0.3% CMC + G graft oil well cement slurry (water to cement ratio is 0.44 ~ 0.55) + 0.2% retarder + 0.2% wood fiber; 800 mesh superfine cement slurry system: 0.5% AES + 0.3% CMC + 800 mesh superfine cement (water to cement ratio is 0.55 ~ 0.55) + 0.2% retarder + 0.2% wood fiber. In addition, the dynamic seal performance evaluation experiments for the optimized foamed cement slurry system were carried on, The experimental results showed that the optimized foamed cement system had the strong ability of sealing profile and the stability of plugging.