10,323
edits
Changes
Jump to navigation
Jump to search
Line 18:
Line 18: − + − [[file:cross-borehole-tomography-in-development-geology_fig1.png|300px|thumb|{{figure number|1}}Schematic illustration of tomographic data acquisition.]]+ − + − [[file:cross-borehole-tomography-in-development-geology_fig2.png|thumb|300px|{{figure number|2}}Ray path diagram documenting the distribution of ray paths across a thermal EOR project tomogram.]]+
→Tomographic data acquisition
==Tomographic data acquisition==
==Tomographic data acquisition==
<gallery mode=packed heights=300px widths=300px>
file:cross-borehole-tomography-in-development-geology_fig1.png|{{figure number|1}}Schematic illustration of tomographic data acquisition.
file:cross-borehole-tomography-in-development-geology_fig2.png|{{figure number|2}}Ray path diagram documenting the distribution of ray paths across a thermal EOR project tomogram.
</gallery>
To acquire seismic tomography data, a source of seismic energy is lowered to the survey depth in the source borehole, and receivers are lowered to an appropriate depth in one or more boreholes that are used to record the seismic data ([[:file:cross-borehole-tomography-in-development-geology_fig1.png|Figure 1]]). The source and receivers each occupy a number of stations, usually regularly spaced over a depth range that includes the zone of interest in the reservoir. The spacing of these stations and the vertical interval they cover (aperture) play a role in determining the final spatial resolution of the tomogram. With receivers operating in additional wells, data for several tomograms can be acquired simultaneously.
To acquire seismic tomography data, a source of seismic energy is lowered to the survey depth in the source borehole, and receivers are lowered to an appropriate depth in one or more boreholes that are used to record the seismic data ([[:file:cross-borehole-tomography-in-development-geology_fig1.png|Figure 1]]). The source and receivers each occupy a number of stations, usually regularly spaced over a depth range that includes the zone of interest in the reservoir. The spacing of these stations and the vertical interval they cover (aperture) play a role in determining the final spatial resolution of the tomogram. With receivers operating in additional wells, data for several tomograms can be acquired simultaneously.