Downhole core plug apparatuses and related methods

1. A downhole formation assessment and sampling tool comprising:

a tubular member configured to be installed into one of a plurality of side pocket mandrels; the tubular member having an uphole end, a downhole end; and a payload housing section positioned between the uphole and downhole ends, the payload housing section is configured to expose a payload, via one or more orifices in the payload housing section, to reservoir fluids from an area of interest in a hydrocarbon reservoir under reservoir conditions for one or more of microbiological monitoring, microbiological sampling, and/or geochemical sampling, wherein the downhole formation assessment and sampling tool is configured to serve as a dummy gas lift valve.

2. The downhole formation assessment and sampling tool of claim 1 , wherein the downhole formation assessment and sampling tool is configured for annular flow of reservoir fluids around the payload.

3. The downhole formation assessment and sampling tool of claim 1 , wherein the payload housing section is configured to house a plurality of payloads stacked end to end.

4. The downhole formation assessment and sampling tool of claim 1 , wherein one or more securing members are housed within the payload housing section for securing the payload.

5. The downhole formation assessment and sampling tool of claim 1 , further comprising a payload housed in the payload housing section, wherein the payload includes a porous material, further wherein the payload is representative of a particular region of the formation or has a desired characteristic.

6. The downhole formation assessment and sampling tool of claim 1 , further including a latch member at the uphole end of the tubular member.

7. A core plug holding apparatus comprising:

a tubular member configured to be inserted into a side pocket of a mandrel, the tubular member having an uphole end, a downhole end, and a core plug section located between the uphole end and the downhole end, wherein the core plug section is used for housing of one or more core plug samples and wherein tubular member includes one or more orifices formed in the core plug section, wherein the core plug samples are used for one or more of microbiological sampling, geochemical sampling, corrosion sampling, and geological sampling, wherein the one or more orifices formed in the core plug section allow a production fluid to contact the one or more core plug samples within the core plug section of the tubular member.

8. The core plug holding apparatus of claim 7 , wherein the core plug section is located more proximal to the uphole end than to the downhole end.

9. The core plug holding apparatus of claim 7 , wherein the one or more core plug samples include corrosion coupons.

10. The core plug holding apparatus of claim 7 , wherein a latch member is compatible with a wireline-retrievable gas lift system.

11. The core plug holding apparatus according to claim 10 , wherein the latch member includes an inlet orifice and an outlet orifice.

12. The core plug holding apparatus of claim 7 , further including one or more intake orifices at the downhole end.

13. A method of sampling a production well comprising:

deploying one or more core plug holding apparatuses into one or more side pocket mandrels of a completion, wherein

each core plug holding apparatuses comprising:

a tubular member configured to be inserted into a side pocket of a mandrel, the tubular member having an uphole end, a downhole end, and a core plug section located between the uphole end and the downhole end, wherein the core plug section is used for housing of one or more core plug samples and wherein tubular member includes one or more open orifices formed in the core plug section, wherein the core plug samples are used for one or more of microbiological sampling, geochemical sampling, corrosion sampling, and geological sampling;

holding the one or more core plug holding apparatuses in the one or more side pocket mandrels for an incubation period; and

retrieving the one or more core plug holding apparatuses from the one or more side pocket mandrels after the passage of the incubation period.

14. The method according to claim 13 , wherein the one or more core plug holding apparatuses are deployed and/or retrieved via a wireline of a wireline-retrievable gas lift system.

15. The method of claim 13 , wherein the one or more side pocket mandrels are positioned at one or more depths of the completion.

16. The method of claim 13 , wherein the one or more core plug samples include microbial biomass or a biofilm.

17. The method of claim 13 , further comprising adjusting at least one parameter of the production well in response to an analysis of the one or more core plug samples.

18. A gas lift system for use in a production well, the gas lift system comprising:

a production tubing extending into the production well and including one or more side pocket mandrels at one or more depths; and

one or more core plug holding apparatuses, each of the one or more core plug holding apparatuses comprising:

a tubular member configured to be inserted into a side pocket of a mandrel, the tubular member having an uphole end, a downhole end, and a core plug section located between the uphole end and the downhole end, wherein the core plug section is used for housing of one or more core plug samples and wherein tubular member includes one or more open orifices formed in the core plug section, wherein the core plug samples are used for one or more of microbiological sampling, geochemical sampling, corrosion sampling, and geological sampling, and

wherein each of the one or more core plug holding apparatuses being installed in one or more of the side pocket mandrels.

19. The gas lift system according to claim 18 , wherein the gas lift system includes a wireline-retrievable gas lift system.