钻井液与完井液2025，Vol.42Issue(3)：368-378,11.DOI:10.12358/j.issn.1001-5620.2025.03.013
巴彦油田深层高温高密度韧性水泥浆体系构建
Construction of a deep high-temperature high-density resilient cement slurry system for the bayan oilfield
摘要
Abstract
For the gypsum salt layer encountered in wells deeper than 6,000 meters in the Bayan-Hetao Basin,where the bottom hole circulating temperature is around 180℃,conventional high-temperature and high-density cement slurries present several technical challenges,including poor rheological performance and stability,high fluid loss,difficult control of thickening time,and slow early strength development.There is an urgent need to develop a salt-resistant,high-temperature,and high-density resilient cement slurry system with a density range of 2.30 to 2.50 g/cm3.In view of the cement slurry admixture,the fluid loss agent(LHF)was prepared by the structure design of'inorganic nanoparticles+polymer weak crosslinking',the retarder(LHR)was prepared by the structure design of'strong adsorption cationic monomer+anionic monomer',and the suspension stabilizer(LHX)was prepared by the structure design of'temperature sensitive association+micro crosslinking'.The fluid loss,thickening time and sedimentation stability of cement slurry were controlled respectively.Relying on the theory of close packing,and adopting a modified MAA model by correcting the Andrease equation with Dinger and Funk's approach,a high-density cement slurry system with densities of 2.30 g/cm3,2.40 g/cm3,and 2.50 g/cm3 is constructed using iron ore powder as the primary weighting agent and GM-1 as a supplementary weighting agent.The particles interact in a ball-bearing manner to reduce friction.To address the issue of slow early development of the mechanical properties of the cement stone,both strength enhancers and toughness improvers are introduced.These additives work at both the nanoscale and microscale to improve the mechanical properties of the cement stone:some fill the pores,while others act as a skeletal structure,forming a configuration similar to"reinforced concrete,"which reduces the brittleness of the cement stone.The final cement slurry systems formed with densities of 2.30,2.40,and 2.50 g/cm3 exhibit good rheological properties,high stability,fluid loss of less than 50 mL,and adjustable thickening times.关键词
超深井/高温/水泥石/增韧剂/抗盐/高密度Key words
Ultra-deep well/High temperature/Cement stone/Toughening agent/Salt resistance/High density分类
能源科技引用本文复制引用
段永强,王秀影,罗玉财,罗敏,孙德,黄盛,李早元..巴彦油田深层高温高密度韧性水泥浆体系构建[J].钻井液与完井液,2025,42(3):368-378,11.基金项目
中国石油天然气股份有限公司项目"超深层高温高压井钻井关键技术研究与试验"(2023ZZ14YJ06) （2023ZZ14YJ06）
华北油田公司重大科技专项"河套盆地油气成藏富集规律与高效勘探关键技术研究"(2024-HB-ZD01) （2024-HB-ZD01）
华北油田公司科研项目"华北油田固井质量提升工程技术研究与应用"(2024-HB-D02). （2024-HB-D02）
