Electrical　submersible　pumps　(ESPs)　dealing　with　gas-liquid　multiphase　flow　face　great　challenges　in　the　oil　and　gas　industries.　The　main　problem　is　caused　by　the　accumulation　of　air　bubbles　inside　the　ESP,　which　degrade　the　pump　performance　ranging　from　minor　to　major　degradation　(surging　and　gas-locking).　Several　empirical　models　have　been　developed　to　predict　head　and　surging　mechanisms.　However,　the　feasibility　and　versatility　of　these　models　are　still　questionable.　Therefore,　this　study　focuses　on　experimental　analysis　and　their　comparison　with　the　existing　empirical　models　(developed　to　predict　Head　and　surging　characteristics　under　two-phase　flow　conditions)　to　examine　their　validity　and　versatility　in　predicting　the　multiphase　performance　of　pumps.　The　comparison　showed　that　some　models　agree　well　with　the　given　test　analysis.　However,　some　models　either　underestimate　or　overestimate　the　predicted　values　because　most　of　these　models　were　established　for　high　inlet　pressure,　no　water　but　oil　and　CO2,　several　impeller　and　diffusers,　different　rotational　speed,　and　different　pump　geometries.　Moreover,　this　study　also　compares　test　results　with　CFD　simulations　(using　Euler-Euler　two-fluid　model)　and　shows　that　the　experimental　results　are　consistent　and　reliable.　Furthermore,　this　study　provides　a　detailed　and　close　insight　into　the　different　aspects　of　empirical　models　to　check　whether　they　can　be　applied　for　wider　applications　or　are　limited　to　the　type　they　were　developed.