安岳气田磨溪009-4-X2井尾管固井技术

针对磨溪009-4-X2井φ177.8 mm尾管固井存在的井底温度高、封固段长、油气显示活跃且跨度长、钻井液密度高且污染严重、下开钻井液密度降低等难题，通过开展加重材料进行优选、对膨胀增韧机理、污染机理、优化工艺参数等研究，形成了高强高密度韧性防窜水泥浆体系、高效抗污染/冲洗隔离液体系及配套工艺技术等措施，解决了顶部水泥浆强度发展慢、高密度水泥石韧性改造难度大、水泥浆与钻井液污染严重、界面胶结质量差等问题，保证了固井施工安全，固井质量合格率为94.5%，优质率为74.8%，解决了固井质量差的难题，为该区块整体固井质量的提高提供技术支撑，为安岳气田高压深井的安全高效开发提供保障。 

Liner Cementing Technology for Well Moxi009-4-X2 in Block Anyue

In running the φ177.8 mm liner string in well Moxi009-4-x2, many difficulties have been expected to be encountered, such as high bottom hole temperature, long cementing section, long and active oil and gas shows, drilling fluid of high density that are severely contaminated, and decreased mud density in the next interval, etc. To deal with these difficulties, a high strength high density anti-gas-migration cement slurry and a high performance contamination-resistant spacer fluid have been developed based on the choice of weighting materials and studies on these issues such as the mechanisms of enhancing the toughness of set cement through expansion, the mechanism of cement slurry contamination, and the optimization of cementing techniques. With the cement slurry, the spacer, and the corresponding techniques, the development of the strength of the top cement slurry has been accelerated, and the toughness of the high density set cement has been improved. The contamination of cement slurry and drilling fluid has been minimized, and the bond strengths of set cement with casing string and borehole wall have been enhanced. 94.5% of the liner string cemented has been up to the standard, and the merit factor of cementing job has reached 74.8%. This cementing technology provides a support for the improvement of the quality of well cementing in the area, and a guarantee for the safe and efficient development of the deep high pressure wells in Anyue gas field.