Casing　deformation　problems　occur　frequently　during　volume　fracturing　of　shale　gas　wells.　It　is　crucial　to　assess　the　casing　deformation　near　heel　(the　beginning　of　the　horizontal　wellbore　trajectory)　where　natural　faults　exist　among　84.6%　of　the　deformation　positions　in　some　shale　plays.　Based　on　the　source　mechanism,　the　fault　slip　distance　was　derived　from　microseismic　inversion.　Then,　three-dimensional　physical　and　finite　element　models　were　established　using　a　stage　finite　element　model　procedure　to　investigate　the　influences　of　fault　slippage　on　casing　stress　and　displacement.　Other　factors　such　as　pump　rate,　fracturing　pressure,　formation　anisotropy,　formation　elastic　modulus,　cement　sheath　elastic　modulus,　casing　size,　and　cement　sheath　thickness　were　taken　into　consideration.　The　results　show　that　(1)　fault　slippage　is　an　important　mechanism　of　casing　deformation　near　heel.　The　casing　has　a　higher　risk　of　deformation　under　the　conditions　of　fault　slippage　combined　with　high　external　stress　and　internal　pressure.　(2)　Under　different　slip　distances,　the　casing　Mises　stress　dramatically　increases　with　an　increase　in　the　cement　sheath　and　formation　elastic　moduli　and　the　ratio　of　the　casing　diameter　to　the　thickness　D-out/t.　(3)　The　high　pump　rate,　high　inner　casing　pressure,　large　formation　anisotropy,　and　small　cement　sheath　thickness　can　aggrandize　casing　stress.　The　calculated　casing　displacements　using　this　model　obtained　good　agreement　when　compared　to　the　deformations　of　the　actual　wells.　Countermeasures　such　as　avoiding　natural　fault　areas,　using　cement　with　an　elastic　modulus　smaller　than　10　GPa,　using　a　higher　grade　and　smaller　diameter　casing　with　a　value　of　D-out/t　smaller　than　12.7　can　be　effective　to　prevent　casing　deformation　during　multi-fracturing　operation.