Wireline log signatures Pulling it all Together: Geological Techniques and Analyses for Correlation Depth Porosity GR TVD NPHI Evaluating Potential Sites for CO2 Storage Reservoirs in Ohio 0 GAPI 200 30 PU -10 RHOB 2 G/C3 3 1300 Sunbury Shale Berea Sandstone 1400 1500 1600 1700 Wireline logging truck on location of a drill rig in operation. 1800 1900 Chagrin Shale Member 2000 2100 2200 2300 1 inch Thin section photo (photomicrograph) of the Lower Huron Shale Member of the Ohio Shale interval. Note the absence of any porosity (void space) 2400 Core photo of the Devonian Shale interval. within the rock matrix. 2500 2600 Lower Huron Shale Member Guernsey County Knox Township Large vugs Permit No. 3923 2700 No. 1 Ringer 2800 Java Formation Pipe Creek Member 2900 Angola Shale Member Beekmantown 3000 ÒB PorosityÓ zone Caverns Rhinestreet Shale Member 3100 Hamilton Group Marcellus Shale Onondaga Limestone 3200 Tables summarizing results of routine core analyses. This data includes measurements such as the porosity (the total volume of empty space [pore space] in a material, usually expressed as a percentage), permeability Wireline log signature of the Devonian Shale interval. This is (the degree to which a material allows fluids to pass through it via an interconnected network of pores one of the primary confining intervals (caprock/seal) for the FMI (Formation Microscanner Image) of the Beekmantown dolomite exhibiting large vugs and cracks). and cavern-size voids. underlying reservoirs for potential CO2 sequestration. Thin section photos (photomicrographs) of the Beekmantown Correlation Depth Porosity dolomite. Note the well-developed porosity or void space (blue GR TVD RHOB epoxy) between and within the individual dolomite grains. 0 GAPI 200 23G/C3 NPHI 30 PU -10 6600 ÒGull RiverÓ Wells Creek Formation 6700 Knox Unconformity Beekmantown dolomite 6800 Core barrel extends out of the rotary sidewall coring tool. Rose Run sandstone 6900 7000 Copper Ridge dolomite .25 inch Thin section photos (photomicrographs) of the Rose Run sandstone interval. Note the presence of good porosity (P) 7100 Sidewall core photos of the Rose Run sandstone. development indicated by the blue epoxy within the individual quartz grains (Q). Courtesy Schlumberger Small sidewall cores. Wireline log signature of the Beekmantown dolomite, Rose Run sandstone, and Copper Ridge sandstone (Knox) intervals. These are potential reservoirs for CO2 sequestration..