石油与天然气化工2025，Vol.54Issue(5)：58-64,7.DOI:10.3969/j.issn.1007-3426.2025.05.007
深井超深井油基钻井液堵漏材料的研究及应用
Research and application of plugging materials for oil-based drilling fluid in deep and ultra-deep wells
摘要
Abstract
Objective To address the technical challenges in plugging oil-based drilling fluid losses in deep and ultra-deep wells,such as materials failure at high-temperature,poor compatibility with oil-based drilling fluids,and inadequate matching with multi-scale fractures,research and performance evaluation of high-temperature-resistant plugging materials have been carried out.Method Based on the characteristics of leakage environment in deep and ultra-deep wells,a composite plugging material system with both high-temperature tolerance and oil-based compatibility was developed by evaluating the materials'resistance to high-temperature aging in oil-based drilling fluids,their compatibility with such fluids,and their fracture-sealing capabilities.Result The indoor test results showed that the developed plugging material system composited by flaky resin GPJ,organic particles and mineral particles GTK,and mineral fibre FHX had excellent resistance(maximum mass loss rate of 19.70%,maximum granularity degradation rate of 15.54%)to high-temperature aging at 200℃,24 h,and had good compatibility with oil-based drilling fluids,the demulsification voltage drop rate was below to 10%,with a plugging pressure capacity of over 20 MPa for fractures ranging from 1 mm to 5 mm.The research results were applied on site in X-1 Well in the Xihu Sag of the East China Sea,the bearing capacity of the formation has been enhanced by 6.4 MPa(a drill fluid equvalent density of 0.17 g/cm3),and effectively resolved lost circulation issues with oil-based drilling fluid.Conclusion The research achievement can effectively solve key technical challenges such as performance degradation,poor compatibility with oil-based drilling fluid,and insufficient coverage of multi-scale fractures at high-temperature environments of deep and ultra-deep wells.It provides valuable insights for treatment of drilling fluid leakage in deep formations and holds promising prospects for engineering applications.关键词
深井超深井/油基钻井液/井漏/堵漏材料/高温失稳/东海西湖凹陷Key words
deep and ultra-deep wells/oil-based drilling fluid/drilling fluid leakage/plugging materia/material failure at high-temperature/Xihu Sag of East China Sea引用本文复制引用
李乾,王睿,杨斌,黄达,张世斌,龙海锋..深井超深井油基钻井液堵漏材料的研究及应用[J].石油与天然气化工,2025,54(5):58-64,7.基金项目
中国石化科技攻关项目"东海大位移井安全高效钻井关键技术研究"(P21067) （P21067）
