Study on permeability interpretation method of calcium-bearing sandstone in D oilfield

Abstract Calcium-containing sandstone layer is widely developed in the sandstone reservoir of D oilfield, accounting for 27.3% on average, with its cemented compaction, poor material property and poor oil content. The calcium-containing sandstone layer has been interpreted as a low hole and low permeability layer in the study area. According to the analysis of the closed core data, the medium and high permeability reservoir in the calcium content layer accounts for more than 60%, and the yield of oil immersion accounts for more than 50%, which is the reserve force for reserve replacement. Researchers from the origin of calcium layer, calcium layer core form, further study of calcium layer lithology, electrical, physical characteristics, the decomposition of calcium sandstone layer, by explaining the influence of calcium layer and calcium sandstone permeability on permeability, calcium permeability interpretation model, calcium layer permeability interpretation accuracy is greatly improved, explain the relative error from 898% to 50%, calcium layer between layers and layer differences get more accurate understanding, provide a more solid guarantee for reservoir fine development.