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Drill Cores From a Large-Scale CO₂ Storage Reservoir at Cranfield, Mississippi

Thursday, 31 March 2022, 12:15 p.m.–1:45 p.m.  |  Houston, Texas

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Room Assignment:
Hilton Univeristy of Houston
Jiemin Lu, Ph.D., Bureau of Economic Geology, The University of Texas at Austin (Now with Schlumberger Reservoir Laboratories)
Included with registration

To verify the viability of saline storage of carbon dioxide (CO), the downdip saline part of a depleted oil reservoir was selected as an experimental injection site at the Cranfield field in Mississippi. An array of one injection and two observation wells were drilled in the lower Tuscaloosa D and E sandstones. One million metric tons (MMT) of CO was injected under an extensive monitoring preprogram.

Drill cores of the storage formation and overlying seal from these two monitoring wells (60 and 100 meters [~197 to 328 feet] away from the injector) will be presented at the conference. The reservoir cores consist of porous fluvial sandstones and conglomeratic sandstone characterized with abundant chlorite rims covering quartz grains. The chlorite, a diagenetic product of dissolution of the volcanoclastic grains in the original deposits, prevented precipitation of later cements and preserved high porosity even to 3 kilometers (~1.86 miles) of burial. The seal rock of the Tuscaloosa Marine Shale forms a continuous regional confining zone in the area. These seal cores display high sealing capacity with characteristics of high clay content, low porosity/permeability, high capillary entry pressure, etc.


Drill Cores From a Large-Scale CO₂ Storage Reservoir at Cranfield, Mississippi
Hilton University of Houston
4450 University Dr
Houston, Texas 77204
United States