The Changqing Iron Border Town Oilfields Of $ 48 Mayor 4 +5 Reservoir Evaluation And Modeling

This paper in view of Chang 4+5 reservoir of Yuan 48 area, Tie Biancheng oilfield, Ordos basin measures geological feature, which is ultra-low permeability, thickness thin, anisotropism is strong, the crack growth, has established the research area isochronism stratigraphic correlation rack useing the high-resolution sequence stratigraphy's basic principle. In the establishment stratum isochronism rack foundation, through the core sample observation, distinguished the submarine distributary channel, the river mouth dam, the river course flank and so on has deposited micro, has clarified this district Chang 4+5 layer on deposition evolution rule. Has calculated the core sample analysis penetration coefficient variation using the Lorentz coefficient method, has carried on the quota description to the goal layer's non-homogeneous degree. Using fractal theory (R/S), according to the reservoir crack in interval transit-time in the bore log response characteristic, the qualitative distinction goal stratigraphic interval crack relative growth degree, draws up its minute shape dimension isogram, the union core sample, the image formation oil well logging as well as the hydraulic fracturing fracture azimuth monitor result, forecast the Chang 4+5 reservoirs crack relative growth area, had pointed out the crack affects one of individual well productivity primary factors, the crack relative growth area, the reservoir transformation effect good, the individual well productivity is high. Synthesis utilization many kinds of reservoirs three dimensional geology modeling technology, has established Chang 4+5 reservoirs the 3D accurate modeling, the direct-viewing reflection sand body, each kind have deposited micro as well as the oil layer mops the characteristic in the three-dimensional space, has established reservoir attribute parameter the and so on porosity permeability saturation distributed model, description reservoir anisotropism, and confirmed mutually through the many kinds of methods, proved this model comparison conformed to the oil deposit geology reality. According to the crack relative growth area forecast result, the 3D accurate modeling, has carried on the synthesis classification appraisal to the reservoir, has pointed out the oil-field development advantageous area.