Figure 1. The diagram on the left shows the reflection coverage (red line) obtained from a single shot location using an older style wireline based receiver array that is 330 ft long. The diagram on the right shows that a much larger reflection coverage area is obtained with a single source point when a tubing deployed long receiver array is used to record data in the borehole. The increasing reflection coverage per shot provided by an 80 level 3C receiver array allows 3D/3C VSP imaging to be an economically feasible approach to high resolution reservoir imaging.