Contamination prediction of downhole pumpout and sampling
A method may comprise positioning a downhole fluid sampling tool into a wellbore; performing a pressure test operation within the wellbore; performing a pumpout operation within the wellbore; identifying one or more formation parameters at least in part from the at least one pressure test operation or the at least one pumpout operation; building a correlation model that relates a pumpout trend to the one or more formation parameters; determining a time when the downhole fluid sampling tool takes a clean fluid sample utilizing at least the correlation model; and acquiring the clean fluid sample with the downhole fluid sampling tool from the wellbore. Additionally, a system may comprise a downhole fluid sampling tool configured to: perform a pressure test operation within a wellbore; and perform a pumpout operation within the wellbore.
1. A method comprising:
positioning a downhole fluid sampling tool into a wellbore;
performing at least one pressure test operation within the wellbore;
performing at least one pumpout operation within the wellbore;
identifying one or more formation parameters at least in part from the at least one pressure test operation or the at least one pumpout operation;
building a correlation model that relates a pumpout trend to the one or more formation parameters;
determining a time when the downhole fluid sampling tool takes a clean fluid sample utilizing at least the correlation model; and
acquiring the clean fluid sample with the downhole fluid sampling tool from the wellbore.
2. The method of claim 1 , further comprising generating the pumpout trend from the at least one pumpout operation.
3. The method of claim 2 , further comprising optimizing the one or more formation parameters with the pumpout trend.
4. The method of claim 2 , further comprising identifying a contamination within the at least one pumpout operation from the pumpout trend.
5. The method of claim 1 , further comprising relating the pumpout trend to the one or more formation parameters with a dataset.
6. The method of claim 5 , wherein the dataset includes one or more samples from at least one location outside the wellbore.
7. The method of claim 5 , wherein the dataset includes data from one or more previous pumpout operations within the wellbore.
8. The method of claim 5 , wherein the dataset includes a pumpout volume.
9. The method of claim 4 , further comprising mapping the contamination at an area.
10. The method of claim 1 , wherein the clean fluid sample is found by using at least two properties of a fluid density, a drawdown mobility, a formation pressure, a drawdown and overbalance pressure, a formation property, or a predicted contamination value.
11. A system for estimating at least one of a clean fluid composition comprising:
a downhole fluid sampling tool configured to:
perform a pressure test operation within a wellbore; and
perform a pumpout operation within the wellbore; and
an information handling system for:
building a correlation model that relates a pumpout trend to one or more formation parameters;
determining when the downhole fluid sampling tool may take a clean fluid sample from at least the correlation model; and
acquiring the clean fluid sample with the downhole fluid sampling tool from the wellbore.
12. The system of claim 11 , wherein the information handling system further generates the pumpout trend from the pumpout operation.
13. The system of claim 12 , wherein the information handling system further measures pumpout data including an accumulated volume and density.
14. The system of claim 12 , wherein the information handling system further identifies a contamination within the pressure test operation from the pumpout trend.
15. The system of claim 11 , wherein the information handling system further relates the pumpout trend to the one or more formation parameters with a dataset.
16. The system of claim 15 , wherein the dataset includes one or more samples from at least one location outside the wellbore.
17. The system of claim 15 , wherein the dataset includes data from one or more previous pumpout operations within the wellbore.
18. The system of claim 15 , wherein the dataset includes a pumpout volume.
19. The system of claim 14 , further comprising mapping the contamination at a certain area.
20. The system of claim 11 , wherein the clean fluid sample may be found by using at least two properties of a fluid density, a drawdown mobility, a formation pressure, a drawdown and overbalance pressure, a formation property, or a predicted contamination value.