石油与天然气化工2025，Vol.54Issue(3)：102-107,152,7.DOI:10.3969/j.issn.1007-3426.2025.03.014
南海气井环空带压诊断与封堵体系性能评价
Diagnosis of annular pressure and performance evaluation of plugging system for the gas well in the South China Sea
摘要
Abstract
Objective In view of the complicated and unclear reasons for the annular pressure of X gas well on a certain platform in the South China Sea,a diagnosis of annular pressure and performance evaluation of plugging system was carried out.Method The depressurization-pressure recovery curve and gas components analysis were used to diagnosis the annular pressure and identify the leakage point location,and the multi-factor coupled with annular pressure diagnosis model was used to quantitatively characterize the parameters of leakage point.Based on the results of the annular pressure diagnosis,the chemical plugging system suitable for gas wells was optimized through the evaluation experiments of viscosity,curing time,compressive strength,cementation strength and plugging performance.Result The A annulus of X gas well was thermodynamic trapped annulus pressure,and the B annulus was sustained annular pressure.The average permeability of the B annulus cement ring was about 33×10-3 μm2,and there existed a significant channel.If other well barriers have a leakage aperture greater than 10 mm,the well integrity risk level is medium risk.In order to solve the problem of channeling in a cement ring,a WS-1 resin plugging system with good injection performance,high compressive strength and bonding strength was selected,and the plugging pressure difference was greater than 15 MPa/m,which had good plugging ability.Conclusion The research findings can provide a scientific basis for addressing annular pressure issues in offshore gas wells,while also offering valuable references for gas production regulation and wellbore integrity management.关键词
环空带压/诊断模型/水泥环窜流/化学封堵体系Key words
annulus pressure/diagnosis model/cement ring channeling/chemical plugging system引用本文复制引用
廖云虎,李力,郑华安,贾辉,王闯,朱彤宇,郑玉飞..南海气井环空带压诊断与封堵体系性能评价[J].石油与天然气化工,2025,54(3):102-107,152,7.基金项目
中国海洋石油有限公司综合科研项目"高温高压气井增产与治理关键技术研究"(KJZH-2023-2204). （KJZH-2023-2204）
