divorce

1.if a person(male) done registry marriage in time of 1992-93 month betwen jan to august.in legel point of view its valid? and the person still now not done any social marrage with her and now denying to marry her socialyand accept her as wife.there is almont 15 years gone as ,per registration ,and does not have any type of husband wife relation ship even then donot hve any type of personal meetings alone.with that period of time.if he now want 2 separate from her in which ground he claim the divorce or he will get any type of legal help?