基于等效模量法的数字岩芯三轴压缩行为研究

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A Study on Triaxial Compression Behavior of Digital Core Based on EquivalentModulus Method

LIN Tiejun1*， ZENG Xin1，SUN Xin2 ，YU Hao1 ，YU Wenshuai3

1.StateKybdploaiotsi 2.Engineeringoehsiteilnidi 3.EngineeringTchologResearchIstitute，etroChinaouthwestOilandGasfieldCompany，Chengdu，icuanO，ina

Abstract：Tddresthechalengesoforingideephard，andbitleformations，suchsdicultiesiobtainngoplete coresamplesandthe highcostof indoorrock mechanics experiments，anumericalapproach is employed.Amulti-component digitalcore model，structuredonaVoronoipolyhedron frameworkisestablishedaccording tomineralcompositioncontent.An equivalentmodulusmethodisproposedtodynamicallyadjustthemechanicalpropertiesofmineralsundertriaxialcompression conditions.Theigitalore'striaxialcompreionprocssissimulated，yielingfracturepaers，tress-strainc，and elastic modulusvalues，whichalignwith indoorexperimentalresults.Acomparativeanalysisof theeffectsoftraxialpressure on theoverallrockstructureandmineralgrains isconductedfcusingondamageandstress distribution.Thefindingsreveal thattheimpactoftriaxialpressureonmineralgrainsvariesdependingonthetypeand spatialdistributionofminerals，while also nhibitingcrack propagation intherock.Thisapproachandtheresultsprovidenewinsights intostudiesonthemechanical andfracturebehaviorofdigitalcores，andeffectivelysimulatesrockmechanicsresponsesand fracturepaternsundercomplex geologicalconditions，andoferingtechnicalsupportforsolving thecoringchallenges indeephardandbritle formations.

Keywords：digital core;triaxial compression;rock mechanics;crack propagation; stress distribution 网络出版地址：http：//link.cnki.net/urlid/51.1718.TE.20250328.1115.004

引言

深部难钻地层通常存在取芯困难问题，难以通过室内实验获取其岩石力学性质，对此，数字岩芯是一种非常有效的解决手段[I。（剩余13717字）