固井作业对油气层的损害主要反映在固井质量和水泥浆对油气层的损害两个方面。在分析和研究了水泥浆对地层损害机理的基础上,优选出了低损害的四种水泥浆配方。实践证明,这些配方性能优良,失水量低,防气窜效果好,固井质量高,能减少对油气层的损害。 Cementing operations damage to the oil and gas reservoirs are mainly reflected in the cementing quality and damage to the oil and gas layers of the two aspects. On the basis of analyzing and studying the damage mechanism of the grout to the strata, four kinds of grout formulations with low damage were optimized. Practice has proved that these formulations excellent performance, low water loss, anti-gas channeling effect is good, high-quality cementing, can reduce the damage to the oil and gas layers.