Chemical inhibitor interactions with reservoir rock

[Buddies2013]

Hi there

I am new to this so forgive me for my lack of knowledge

I am currently working on a project which relates to chemical inhibitors.  The base of the project revolves around using PHREEQC to understand the effect chemical inhibitors can have on scale problems.  Scale problems promote sand production.

I am essentially using PHREEQC to see the effects different chemicals have on reservoir formation.  This can be best done by comparing chemicals which are injected into a reservoir that isn't producing sand and a reservoir that is producing sand followed by sorption and desorption graphs etc to help evaluate the results.

Any help would be much appreciated regarding where to begin.  I know this is a vague topic however, i welcome any more questions to help make it more understandable.

thank you

[Tom]

Hi Buddies2013,

Perhaps you could provide a bit more detail regarding your background to PHREEQC? Are you a very new user or have you worked through the examples in the user manual?

In terms of your study, it will of course be important to first conceptualise your problem and determine the geochemistry of the solutions in your reservoirs (and any additional chemicals that are added during the drilling process).

It sounds like the best application of PHREEQC may be either using the REACTION or MIX blocks, depending on what you are trying to achieve. If you are going to add the inhibit to the reservoir solution in stages, INCREMENTAL REACTIONS may be important.

If you come up with a specific problem, we might be able to help frame this into an input file. For example you might have a rock formation with known mineralogy (calculate the moles) and pore water chemistry (pH, pE, temperature, anions, cations, alkalinity etc). You may also know the chemical phase of your inhibitor as well as its molecular mass and number of moles added.

You may have already done the above and in which case please feel free to share your progress and others will be able assist further with specific questions.

Best of luck,

Tom