LOGAN, DALE, JACK HORKOWITZ, ROB LARONGA and DAVE CROMWELL
In carbonate reservoirs dominated by intercrystalline or intergranular porosity, NMR can deliver accurate estimates of porosity, permeability, bound fluid volume and residual oil saturation. However, in vuggy, heterogeneous carbonates more complex interpretation models, based on the integration of whole core and log data, are required for reliable answers. The new models handle both homogeneous reservoirs dominated by primary porosity and heterogeneous reservoirs dominated by vuggy porosity. NMR answer products, based on these new models, are validated through production results and by comparison to other logging measurements. Six applications of NMR interpretation are demonstrated using logs from six different formations (San Andres, Grayburg, Clearfork, Glorietta, Tubb and Drinkard).
AAPG Search and Discovery Article #90936©1998 AAPG Southwest Section Meeting, Wichita Falls, Texas