General Setting
Information Search and Selection

Com ments

on

Geo logic

Para meters

1 Depth:

2 Permeability/Hydraulic Conductivity:

3 Formation Thickness:
4 Net Sand Thickness:
5 Percent Shale:
6 Continuity:
7 Top Seal Thickness:
8 Continuity of top seal:
9 Hydrocarbon Production:
10 Fluid Residence Time:
11 Flow Direction Elevation:

12

CO2 Solu bility Brine

 12a Temperature:
12b Pressure:
12c Salinity:
13 Rock/Water Reaction:
14 Porosity:
15 Water Chemistry:
16 Rock Mineralogy:

Jasper Interval, East Texas Gulf Coast

Comments on Geologic Parameters

1 Depth::

The top of the Fleming (or Lagarto/Oakville) Formation occurs at about 1,200- to 1,300-m depth in the Texas City area and generally deepens seaward. The map depicting the altitude of the top of the Jasper aquifer (feet below mean sea level) in Baker (1986) was used in the GIS because it most clearly shows the top of the hydrogeologic unit of interest. Although this map provides an excellent regional perspective, it does not show local offsets associated with faulting, which will need to be considered when specific CO2 sequestration sites are located (see later discussion of parameter 8, continuity of top seal, for more information regarding the nature of faulting within the Miocene interval in the Texas City area). We gridded the structure map on top of the Jasper and then calculated depth to top Jasper (c1jasper) by subtracting subsea elevation of the top Jasper from land-surface elevation of a DEM generated from Digital Terrain Elevation Data (National Imagery and Mapping Agency, 2000).

1 Map:

1 Reference:

Baker, E. T., Jr., 1986, Hydrology of the Jasper Aquifer in the southeast Texas coastal plain: Texas Water Development Board, Report 295, 64 p.