应用数学和力学2026，Vol.47Issue(8)：999-1008,10.DOI:10.21656/1000-0887.460178
全过程下钻速度对地层裂缝宽度影响
Effects of Entire Process Tripping-in Speeds on Formation Fracture Widths During the Entire Process
摘要
Abstract
The tripping-in speed affects the wellbore effective pressure,leading to changes in formation frac-ture widths and posing a risk of mud loss.The tripping-in speed and drilling fluid compressibility,along with the well depth,the bottom-hole assembly,the formation petrophysical parameters,and the drilling fluid prop-erties were incorporated to build a mathematical model coupling wellbore pressure transients and fracture de-formation.The model was solved with the finite element-finite volume coupling method and validated with data from the hard-brittle shale formation of the Longmaxi formation in the Zi X well of the Weiyuan Block in the Si-chuan Basin.The results show that,i.when the tripping-in speed increase from 0.5 m/s to 2.0 m/s,the well-bore pressure will increase from 86.0 MPa to 106.6 MPa,while the fracture width will rise from 0.478 mm to 0.881 mm.ii.Bigger fracture widths go with greater tripping-in depths and higher drill string annular ratios.At a tripping-in speed of 0.5 m/s,when the tripping depth increases from 1 500 m to 5 500 m,the fracture width will rise from 0.432 mm to 0.478 mm;when the drill string annular ratio increases from 0.59 to 0.65,the fracture width will rise from 0.463 mm to 0.487 mm.iii.As the tripping-in speed increases from 0 to 1.5 m/s,at a trip-ping depth of 1 500 m,the fracture width will rise from 0.4 mm to 0.474 mm;at a tripping depth of 5 500 m,the fracture width will rise from 0.5 mm to 0.624 mm.Bigger fracture widths go with higher tripping-in speeds,and the rising trend will be more pronounced once the tripping-in speed exceeds 1.0 m/s;further,this rise becomes more pronounced with greater tripping depths.This study provides a theoretical basis for optimizing tripping-in operation parameters and offers an important guidance for preventing mud loss incidents during drilling.关键词
下钻速度/裂缝宽度/井筒压力/流-固耦合Key words
tripping-in speed/fracture width/wellbore pressure/fluid-solid coupling分类
数理科学引用本文复制引用
赵世贵,孔祥伟,钟森..全过程下钻速度对地层裂缝宽度影响[J].应用数学和力学,2026,47(8):999-1008,10.基金项目
"十五五"新型油气勘探开发国家科技重大专项(SQ2025AAA120076) （SQ2025AAA120076）
