Page 21 - Petroleum and Gas Field Processing
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Figure 1 A reservoir formed by folding of rock layers.




























            Figure 2 A cross section of a faulted reservoir.

                 3.  Salt-Dome Reservoirs: This type of reservoir structure, which
                    takes the shape of a dome, was formed due to the upward
                    movement of large, impermeable salt dome that deformed and
                    lifted the overlying layers of rock. As shown in Figure 3,
                    petroleum is trapped between the cap rock and an underlying
                    impermeable rock layer, or between two impermeable layers of
                    rock and the salt dome.






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