Formation of carbonate fractured-vuggy reservoirs is controlled by palaeogeomorphology

tectonic movement and karstification.The main storage spaces are large-scale caves

small-scale dissolved pores and multi-scale fractures with different geometry.Because of complicated genetic mechanisms and highly discrete

traditional continuum reservoir characterization methods are difficult to apply directly.Based on the recognition and description of fractured-vuggy reservoir

we use the classification characterization method to characterize various reservoirs.Guided by karst genetic mechanisms and outcrops studies

in combination with seismic qualitative forecast and quantitative inversion results

we simulate wea-thering karst caves and faults-controlled caves using sequential indicator and the object-based method respectively.We use the method of collaborative sequential indicator simulation to establish the distribution model of the small scale dissolution pore.Based on the seismic information

we establish the multi-scale discrete fracturing network using the artificial interpretation

ant tracking and random simulation methods.Based on karst genetic mechanisms

we construct fusion principle for different types of reservoirs

and thus effectively integrated different types of reservoirs.The results show that the idea of the classification and characterization method can effectively describe the strong heterogeneity of S80 unit.Based on the model

we can refine the reserve classification in different the reservoir pay sections

evaluate the new well design

identify the target area

and apply it to the numerical simulation of reservoirs.The method lays the geological foundation to guide discovery of remaining oil potential

and modification of development plan.