东海低渗区压裂诱导应力分析及施工参数优化郭照越1，孔祥伟1，陈峥嵘2，甘洲1，叶佳杰1（1．长江大学石油工程学院，湖北武汉430100；2．中海油研究总院有限责任公司，北京100028）摘要：考虑地层弹性模量、泊松比、地应力等参数，基于位移不连续理论、弹性理论，建立了诱导应力场数学模型，以东海低渗21-X井为例，开展了Abaqus数值模拟，分析了射孔角度、射孔排量、簇间距对裂缝转向扩展和诱导应力的影响，结果表明：随着簇间距的增大诱导应力增大，增大幅度呈平缓趋势，推荐簇间距为30～60m；随着射孔排量增大，诱导应力差异系数范围逐渐增大，推荐射孔排量为5～6m3/min；当射孔角度为0°时，裂缝长度最长，随着射孔角度增大，裂缝逐渐形成双翼型转向裂缝，且转向特征逐渐明显，推荐射孔角度为0°～30°；当水力裂缝偏转角＜90°或天然裂缝偏转角≤45°时，水力裂缝尖端诱导应力差较小，甚至为负，从而阻碍裂缝转向作用力较小，有利于形成复杂缝网，达到增产上储的目的。关键词：水力压裂；诱导应力；簇间距；射孔排量；射孔角度中图分类号：TE357.1文献标识码：A文章编号：1673-5285（2023）03-0058-06DOI:10.3969/j.issn.1673-5285.2023.03.012AnalysisoffracturinginducedstressandoptimizationofconstructionparametersinlowpermeabilityareaoftheEastChinaSeaGUOZhaoyue1，KONGXiangwei1，CHENZhengrong2，GANZhou1，YEJiajie1（1.SchoolofPetroleumEngineering，YangtzeUniversity，WuhanHubei430100，China；2.CNOOCResearchInstituteLtd.，Beijing100028，China）Abstract:Amathematicalmodelofinducedstressfieldwasestablishedbasedondisplace－mentdiscontinuitytheoryandelastictheory,consideringformationelasticmodulus,Poisson'sratioandin-situstress.Takingthelow-permeabilitywell21-XintheEastChinaSeaasanexample,Abaqusnumericalsimulationwascarriedouttoanalyzetheeffectsofperforationangle,perforationdisplacementandclusterspacingonfractureturningpropagationandin－ducedstress.Theresultsshowedthat,theinducedstressincreaseswiththeincreaseofclusterspacing,andtheincrementrangeisnotlarge.Theoptimaldatabetweenclustersis30～60m.Withtheincreaseofperforationdisplacement,therangeofinducedstressdifferencecoeffi－cientgraduallyincreases,andtheoptimalperforationdisplacementis5～6m3/min.Whenthepe...
