Numerical　simulation　was　conducted　to　analyze　the　influence　of　energy　storage,　operation　frequency,　elastic　modulus,　and　stress　in　rocks　on　effective　repeated　pulse　shock　waves　for　well　stimulation.　The　simulation　results　show　that,　in　the　case　with　low　energy　storage,　only　plug　removal　can　be　achieved　with　no　reservoir　fracturing,　while　in　the　case　with　high　energy　storage,　micro　fractures　can　be　generated　that　can　induce　reservoir　fracturing　and　increase　the　formation　permeability.　With　the　increase　of　the　number　of　operations,　the　effective　influence　distance　of　the　shock　wave　can　be　increased　continuously　to　a　maximum　value.　After　that,　it　remains　constant.　The　rock　stress　has　a　great　effect　on　the　performance　of　the　shock　wave.　With　the　increase　of　the　rock　stress,　the　effective　distance　of　the　shock　wave　decreases　logarithmically,　and　when　the　rock　stress　is　low　and　the　elastic　modulus　is　high,　the　effective　distance　increases　as　the　number　of　operations　increases.　When　the　rock　stress　is　high,　the　operation　frequency　and　elastic　modulus　have　little　effect　on　the　effective　distance.　The　repeated　strong　shock　wave　can　enhance　plugging　removal　and　increase　production　or　injection　of　wells　for　the　reservoir　with　large　elastic　modulus　and　low　rock　stress.　In　practical　applications,　the　operation　frequency　can　be　optimized　based　on　specific　reservoir　conditions.　©　2016,　Periodical　Office　of　China　University　of　Petroleum.　All　right　reserved.