Shale　reservoirs　are　usually　developed　by　horizontal　wells　and　staged　fracturing,　and　severe　casing　deformation　occurs　during　development.　The　main　deformation　form　is　shear　deformation.　The　main　reason　for　casing　shear　deformation　is　that　during　hydraulic　fracturing,　when　the　fracturing　fluid　enters　the　natural　fracture　or　weak　cementation　surface,　the　normal　stress　between　the　fracture　surface　or　bedding　surface　will　be　significantly　reduced,　and　the　friction　coefficient　between　the　two　will　also　be　substantially　reduced,　which　will　lead　to　relative　sliding　of　the　rock　mass　on　both　sides　of　the　fracture　or　bedding.　Once　the　rock　mass　slips,　it　will　lead　to　shear　deformation　of　the　casing.　Given　this,　a　method　of　reducing　casing　shear　deformation　using　composite　cement　slurry　column　structure　is　proposed:　inject　conventional　cement　slurry,　elastic　and　ductile　cement　slurry,　and　cement　slurry　containing　hollow　glass　beads　into　the　wellbore　in　sections.　The　high　porosity　cement　sheath　formed　by　cement　slurry　containing　hollow　glass　beads　can　effectively　reduce　the　degree　of　casing　shear　deformation　during　formation　slip,　and　the　elastic　and　ductile　cement　slurry　can　effectively　seal　the　possible　gas　channeling　problem.　During　the　research,　the　optimal　rheological　model　of　the　composite　cement　slurry　column　was　optimized,　the　change　of　the　annulus　pressure　loss　caused　by　the　mixing　was　calculated,　and　the　influence　of　the　cement　sheath　formed　by　the　structure　solidification　of　the　composite　cement　slurry　column　on　the　reduction　of　the　shear　deformation　of　the　casing　was　analyzed.　The　research　results　show　that　the　established　rheological　composite　cement　slurry　column　model　can　be　well　applied　to　the　project　site.　Still,　the　influence　of　the　cement　slurry　system　on　friction　should　be　considered　in　the　use　process.　The　cement　sheath　formed　by　cement　slurry　containing　hollow　glass　beads　can　effectively　reduce　the　shear　deformation　of　the　casing.　With　the　continuous　increase　of　the　content　of　hollow　glass　beads,　the　ability　to　reduce　the　shear　deformation　of　the　casing　is　continuously　improved.　The　research　results　provide　a　new　way　to　solve　the　problem　of　casing　deformation　caused　by　interlayer　slip　and　shear　during　hydraulic　fracturing.　©　2023　57th　US　Rock　Mechanics/Geomechanics　Symposium.　All　Rights　Reserved.