高压盐层固井水泥浆研究

Slurry for High Pressure Salt Bed Cementing

针对高压盐层的油气井固井特点,注水泥时常采用高密度含盐水泥浆。以颗粒分布原理为基础,优化出加重材料BCW-3S和BCW-1S;采用优化出的加重材料和抗盐的外加剂配制出了含盐及不含盐的、最高密度可达2.6g/cm3的高密度高性能水泥浆。该水泥浆在淡水和含15%NaCl的情况下均具有较低的失水、较好的流变性能和沉降稳定性等性能,凝固水泥石具有较高的强度,适用于高压盐层油气井的固井施工。

In consideration of the characteristics of high pressure salt bed cementing of oil and gas wells, high density salt slurry is often used for cementing. Weighted materials BCW-3S and BCW-1S are optimally designed based on the theory of particle distribution. High density and high performance slurries containing and without containing salt with density as high as 2.6 g/cm3 are prepared respectively by using the weighted materials with salt-resisting additive. Under the condition of fresh water and 15%NaCl solution, the slurry is lower fluid loss, good rheological property and stable settlement, the set cement has higher compressive strength, which is suitable for cementing oil and gas wells in high pressure salt bed.