Detection of hydrocarbon reservoir in an offshore environment is a very challenging task for deep target. Magnitude of electromagnetic field response is still very low and cannot be able to detect the deep target reservoir by dipole antenna. To detect the deep target in an offshore environment antenna is designed by using computer simulation technology (CST) software. Modeling with Antenna in marine environment was done by Finite integration method (FIM). Model area was assigned as (40�40 km) to replicate the real seabed environment with array of receivers placed on the sea floor. New antenna radiation pattern shows 8.4dBi gain which is 6.3 times more as compared to the dipole antenna used for seabed logging. An electric and magnetic field component study was also done in an offshore environment. Ex and Hz field component response with the new antenna was measured in deep water environment. It was analyzed that the new dipole antenna shows a 232 improvement in magnitude verses offset in seawater. Experimental testing was also done at lab scale in air. New antenna experimental results show 200 higher field strength than dipole antenna. This antenna can be used for deep target hydrocarbon exploration. © 2013 IEEE.