水力压裂钻孔抗高压封孔材料研发及带压封堵特征研究OA北大核心CSTPCD
Research and development of anti-high pressure sealing material and sealing characteristics in hydraulic fracturing borehole
为解决因封孔质量不达标导致的水力压裂卸压增透技术在井下现场应用的难题,在总结国内外抗高压封孔材料及封孔方法的基础上,通过系统性基础实验,探究了普通水泥添加特种复合水泥、膨胀剂和减水剂等辅助材料对抗高压封孔材料的凝结时间、流动性、抗压强度以及膨胀倍率等基础性能的影响规律.研究表明:抗高压封控材料最佳水灰比为 0.5,特种复合水泥添加量为 20%～25%,复合膨胀剂添加量为 4%,萘系减水剂添加量为 1.6%时,抗高压封孔材料在保障流动度及膨胀倍率前提下呈现早强高强特性.为验证新材料性能,在龙煤集团平岗煤矿进行现场工业性试验,其凝固时间及抗压强度等参数均达到性能要求.
In order to solve the problem of hydraulic fracturing presure relief and permeability improvement technology applied in underground field due to the substandard sealing and control quality,in this paper,on the basis of summarizing the existing hole seal-ing materials and sealing methods at home and abroad,through a large number of basic experiments,the influence of auxiliary mater-ials such as ordinary cement added with special composite cement,swelling agent and water reducing agent on the basic properties of anti-high pressure sealing materials such as setting time,fluidity,compressive strength and swelling multiplication rate was studied.The best water-cement ratio of 0.5,20%-25%of special composite cement,4%of compound expander and 1.6%of naphthalene wa-ter reducer were determined to ensure the early strength and high strength of the anti-high-pressure sealing material with the premise of flowability and expansion rate.It also conducted on-site industrial experiments in Pinggang Coal Mine of Longmei Coal Group,and its parameters such as solidification time and compressive strength met the performance requirements.
王蔚鸣;张超
西安科技大学 安全科学与工程学院,陕西 西安 710054||国家电网陕西省电力有限公司,陕西 西安 710048西安科技大学 安全科学与工程学院,陕西 西安 710054
矿山工程
抗高压封孔材料水力压裂凝结时间流动性抗压强度
anti-high pressure sealing materialshydraulic fracturingsetting timefluiditycompressive strength
《煤矿安全》 2024 (008)
8-15 / 8
国家自然科学基金资助项目(51974241)
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