王南沟区块是安塞油田近几年勘探开发的重点。针对该区块目的层含油水层、底水油藏、原油伴生气和地层压力不平衡而严重影响封固段固井质量的问题 ,研制成功了GJR早强、降失水水泥浆体系 ,突出早强、微膨胀和触变性 ,适当放宽降失水控制。已固井 30 0口 ,固井一次合格率 10 0 % ,优质率 90 .6 % Wangnangou Block is Ansai Oilfield exploration and development in recent years the focus. Aiming at the problem of the cementing quality in the sealing section which is affected by the oil-bearing water layer in the block, the bottom water reservoir, the associated gas of crude oil and the formation pressure imbalance, the cement slurry system with early strength and loss of water of GJR was successfully developed. Early strength, slight swelling and thixotropy, appropriate to reduce loss of water control. Cementing 30 0, cementing a pass rate of 100%, high-quality rate of 90.6%