Abstract:

Following methods were adopted to predict the pinch out traps of braided deltaic sandbodies in southern part of Akekule Rise:1.drilling profile correlation was made in the study area and two pinch out were found on the top of Akekule Rise and Paleo sag respectively;2.seismic response was used to trace the pinch outs and the weak blank reflection corresponded well with the pinch outs;3.forward model was made to verify the pinch outs.The results indicate that short distance rapid pinch outs developed in the braided river deltaic sandbodies in southern Akekule Rise.It thus predicted that there are two sandstone pinch out traps with the areas of 56 km² and 160 km² respectively in the middle and lower oil reservoir set.The traps,situated on the passageway of multiphase oil migration since late Cretaceous with fractures as the passageways,are easy to trap oil and gas and are prospects in oil and gas exploration.

Key words: braided river, deltaic sanbody, pinch trap, Trassic, Akekule Rise