Complex subtle trap further falls into structural lithology , structural unconformity and lithology unconformity reservoirs . so far , the main theories to study subtle trap include early seismic stratigraphy and late sequence stratigraphy , between them sequence stratigraphy is most effective , its stand tract concepts for different depositional systems is of important significance 目前,世界上研究隱蔽油氣藏的理論主要有早期的地震地層學(xué)理論及新興的層序地層學(xué)理論,其中層序地層學(xué)理論最為引人注目,且是尋找隱蔽油氣藏的最好的方法,其不同水位期對不同沉積體的尋找具有指導(dǎo)意義。