With the gradually development of the petroleum exploration, more and more lens reservoirs have been discovered and been paid more and more attention. Many academicians researched their formation and accumulation mechanism and put forward manifold mechanisms, including the special mechanism of minority liquid molecular controlling the accumulation of lens reservoir by unknown gravitation, difference between liquid pressure compelling hydrocarbon to accumulate firstly in the lens reservoir, along cranny in the case of hydrocarbon replacing pore water in the lenticular body under capillary pressure, difference breakthrough employing hydrocarbon entering lens reservoir and so on .Present modeling experiments for petroleum formation and accumulation are focus on microcosmic mechanisms and future study direction would be accumulation  dynamics, model ,main control factors, quantitative research, physical simulation experiment , distribution forecasting  and so on.  