System and method for plugging a downhole wellbore

1. A method for plugging a downhole wellbore, comprising:

running an anchor and swellable seal disposed at a mandrel within the downhole wellbore;

setting the anchor within the downhole wellbore;

releasing the anchor and the swellable seal;

swelling the swellable seal into contact with another downhole structure; and

plugging the downhole wellbore to flow therethrough past the swellable seal.

2. The method for plugging a downhole wellbore of claim 1 , wherein the releasing is disconnecting the anchor and the swellable seal from a wireline.

3. The method for plugging a downhole wellbore of claim 1 , wherein the releasing occurs prior to the swelling into contact with the downhole structure.

4. The method for plugging a downhole wellbore of claim 1 , wherein the swelling further includes sealing the swellable seal to the downhole structure.

5. The method for plugging a downhole wellbore of claim 4 , further comprising initiating swelling of the swellable seal with one of a change in pressure, a change in temperature, a change in time and exposure to a chemical.

6. The method for plugging a downhole wellbore of claim 4 , wherein the swelling of the swellable seal is in response to exposure of the swellable seal to a fluid.

7. The method for plugging a downhole wellbore of claim 6 , wherein the fluid is at least one of, oil, water, hydrocarbon and a gas.

8. The method for plugging a downhole wellbore of claim 1 , wherein the swelling of the swellable seal into contact with the downhole structure is delayed more than twenty-four hours from initiation of swelling of the swellable seal.

9. The method for plugging a downhole wellbore of claim 1 , further comprising initiating setting of the anchor with one of time lapse, a change in pressure, a change in temperature and exposure to a chemical.

10. The method for plugging a downhole wellbore of claim 1 , further comprising triggering a setting tool to set the anchor.

11. The method for plugging a downhole wellbore of claim 10 , wherein the triggering is initiated at surface.

12. The method for plugging a downhole wellbore of claim 10 , wherein the triggering employs a wireline.

13. The method for plugging a downhole wellbore of claim 12 , wherein the wireline is electrically conductive.

14. A downhole wellbore plugging system, comprising:

a mandrel being runnable within a downhole wellbore and releasable therewithin;

an anchor disposed at the mandrel being anchorable to the downhole wellbore; and

a swellable seal disposed at the mandrel being sealable with the downhole wellbore and the mandrel in response to swelling thereof to thereby plug the downhole wellbore to fluid flow therethrough.

15. A method for plugging a downhole wellbore comprising:

running a tool having an anchor and a swellable seal into the downhole wellbore with a wireline;

anchoring the tool within the downhole wellbore;

retrieving the wireline; and

swelling the swellable seal into contact with another downhole structure subsequent to retrieval of the wireline thereby plugging the downhole wellbore to fluid flow past the swellable seal.