TITLE:
Analysis of the Law of Organic Solid Phase Precipitation and Deposition during Carbon Dioxide Displacement Process
AUTHORS:
Peng Yu
KEYWORDS:
Organic Solid Phase, Precipitaion and Deposition, Carbon Dioxide Displacement, Blockage, Near Minimum Miscibility Pressure
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.7 No.1,
January
30,
2019
ABSTRACT: Carbon Capture, Utilization and Storage (CCUS) has been regarded as an indispensable,
strategic and pressing technology to reduce anthropogenic carbon
dioxide emissions, and mitigate the severe consequences of climate
change. Its utilization and storage play important roles in this system and
they can be applied for oceanic and underground geological sequestration
especially for the oil gas reservoir that needs to improve recovery. For the
carbon dioxide flooding process, the crude oil displacement generally shows a
better performance with the increase of the pressure. However, carbon disposal
is always complex. It could encounter organic solid phase precipitation
and deposition in near miscibility environment. The law of multiphase and
multicomponent diversification in the whole processes is still poorly understood.
We thus used the method of slim tube to get dynamic data during the
process. Indeed, the interval of near minimum miscibility pressure was determined.
Analysis results of injectivity index and productivity index show
that the reservoir blockage primarily appears as the displacement pressure is
higher than the near minimum miscibility lower limit pressure and plays an
important role in the production capacity. Extortionate or low pressure is not
conducive to carbon dioxide displacement.