河套盆地巴彦强构造挤压地层各向异性地应力计算方法

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中图分类号：TE21 文献标志码：A 文章编号：1000-7393（2025）-04-0397-10

Abstract：Duetothiuenceofitensietectonicompresonfodedbeltsinayn，HetaoBasin，eockmechaicsotis varyacrossdifferentdirections，sultinginfrequentdownoleomplicationsduringdriling.Indertoimprove theauacyofock

mechanics parameterscalculationandreveal the stress distribution paterms in dep strata，basedonthe assumptionof anisotropy， throughanalogyand simplificationof therelationshipbetwenrock ultrasonictest experimentand formation acoustic loging， combinedwiththediferentialresponseofsandstoneandmudstone totectoniccompresion，amicroelementmodelforsandy-muddy strata wasdeveloedtovaatethefomatinansotropycharacteristis.Attesametie，testre-strncostitutivequationwas adopted tocalculate theaisotropicrockmechanicsparameters，ndtheTiercelinmodelwas introducedtodrawtheansotropicinsitustress profiles.Themodel predictionresultswere validatedbytriaxialcompressiontestsandacousticemission Kaiser experiments.Theresultsshowthatafterentering theintensivetectonicallcompressdstratum，thehorzontalmaximumprincipal stressexcedtheoverburdenpressureandbecomesthedominantfactorcontrolingrock mechanicsproperties，andthelateralrock mechanics propertiesareenhanced.Maintaining the directionof dynamicand staticrock mechanicsparametersconsistent，the establishedanisotropicmechanicsparametersconversionmodelismoresuitableforintensive tectonicallycompressd strata. Comparedwiththetraditionalisotropicin-situstresscalculationmodels，theanisotropicmodelbasedonacoustictimedifference logingcan more acuratelyreflectthe variation lawof in-situ stress with depth，andthe predictionaccuracy is improved by 8.22% Theestablishdaisotropicin-situstresscalculationmetodproidesaelablethoreticalbasisandegineeringgudaneforaead efficient drilling in intensive tectoniccally compressed formations.

Keywors：Hetaasin;tesitoicomprion;lboabilityockmhaicsramers;cousticlgg;elin model

0 引言

巴彦油田在吉兰泰中浅层勘探获得突破后，将勘探目标逐渐向河套盆地北部兴隆构造带深层拓展。（剩余16923字）