膨润土低密度水泥浆体系的实验研究与现场应用

Experimental study and Field application of low density Cement slurry with bentonite

针对胜利海上埕岛油田老区调整井固井封固段长、目的层易漏难点。文章主要作了如下工作:研究了膨润土低密度水泥浆的综合性能,并结合海上平台实际工况,将其应用于封固油气层顶200m以上非目的层水泥充填井段,目的层段应用常规密度防漏水泥浆体系封固,取得了良好的应用效果。现已应用了100多口井,满足了海上安全生产要求,保证了固井质量,该固井模式在胜利海上油田和陆地油田调整井固井中具有较高的推广应用价值。

For the Shengli Offshore Chengdao oil field,the adjustment well cementing section is long and the target layer is easy to leak.The main work of this paper is as follows:The comprehensive performance of low density cement slurry with bentonite is studied,and combined with the actual working condition of offshore platform,it is applied to cementing the cementing filling section of non-target formation over 200 mabove the top of oil and gas reservoir,and the cementing system of conventional density anti-leakage cement slurry is applied to cementing the target formation,good results are obtained.More than 100 wells have been used to meet the requirements of safe production at sea and to ensure the quality of cementing.The cementing mode has high popularization and application value in Shengli offshore oilfield and land oilfield adjustment wells.