Uttam,
The answers to your first three questions are all "yes."
I don't have experience with a polymer wag.
Here are a couple of references for heavy oil CO2 EOR which I found to be very useful:
SPE 14438
Multiple-Contact Phase Behavior
Measurement and Application With Mixtures of Highly Asphaltic Crude
D.W. Bryant,* SPE, Louisiana State U.
T.G. Monger, SPE, Louisiana State U.
NIPER-297
OIL RECOVERY BY IMMISCIBLE C02 FLOODING
Topical Report
By Frank T. H. Chung
March 1988
NIPER-297
(DE88001220)
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Alexander Lamar
Sr. Res Engr
CapturePoint LLC
www.capturepointllc.comCapturePoint is currently earning 45Q Tax Credits on ~1.0 million tons per year of sequestered CO2
CapturePoint is currently developing Class VI injection sites in Colorado, Kansas, Louisiana, Oklahoma, Mississippi, and Texas
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Original Message:
Sent: 08-22-2023 08:03 PM
From: Uttam Gupta
Subject: Heavy Oils and Co2 injection
How successful is Immiscible CO2 flooding is for heavy oils (10-20 API) ? Is asphaltene dropout is significant from immiscible flood compared to miscible one ? Is it difficult to achieve the miscibility between Heavy oil and CO2 ?
How feasible is Polymer Alternate Co2 Gas flooding for heavy oils In case of limited Co2 supplies where using polymer to maintain the pressure needed for solubilization of Co2 in oil is achievable ?