| With the deepening of the exploration degree in the Mahu Sag,the slope area has become the main development area,and the Baikouquan Formation has become a key exploration and development object of the Triassic.The reservoir rock type of the Baikouquan Formation is mainly conglomerate,which is the main oil-bearing layer of the Triassic system.The sedimentary facies and lithofacies are spread on the plane with poor continuity.The pore throat structure is complex.The problem of large degree of oil and high oil saturation leads to that it can only be determined that the Baiyi 1 and Bai2 are the main oil-producing layers,but the main oil-producing small layers cannot be further accurately defined,and the exploration and development are more difficult.The development of this type of conglomerate reservoir is of great significance.In this paper,the Baikouquan Formation of the BH block in the Maxi slope is taken as the research goal.On the basis of the investigation of the geological situation of the Mahu sag,petrological methods are used to determine the marker layer and the stratum based on the log curve.Contrast division;by studying rock characteristics and bedding structure,using sedimentary facies analysis method to determine sedimentary facies,sedimentary microfacies and sedimentary environment,and draw sedimentary facies distribution map;study microscopic pore structure and physical properties of reservoir To determine the reservoir type and analyze the relationship between porosity and permeability;finally,a stochastic modeling method was used to establish the lithofacies model of the reservoir,and the porosity-saturation attribute model was simulated under the condition of phase control,and the volume method was used to calculate The geological reserves of the block predict the main oil-producing small layer,and the results show that it is more consistent with the oil test results,which can be used as a reference basis for perforation of infill wells. |
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