Preliminary geologic modeling and flow simulation study of CO2 sequestration in a depleted oil reservoir
Dates
Year
2001
Citation
Pawar, R.J., Zhang, D., Stubbs, B., and Westrich, H.R., 2001, Preliminary geologic modeling and flow simulation study of CO2 sequestration in a depleted oil reservoir: Los Alamos National Laboratory, 16 p.
Summary
Sequestration of carbon dioxide (CO2) in depleted oil reservoirs is one of the viable options for carbon management. This paper describes the preliminary modeling and flow simulation part of a DOE sponsored CO2 sequestration project. The main objective of the project is to understand the feasibility of long term sequestration of CO2 in a depleted oil reservoir through a field demonstration experiment. Before the actual CO2 injection begins, it was necessary to determine feasibility of injection. Advanced geologic modeling and flow simulation techniques were used to develop a model for the proposed target interval. A geologic model was developed using data available from well logs and cores. Subsequently, porous media flow simulations [...]
Summary
Sequestration of carbon dioxide (CO2) in depleted oil reservoirs is one of the viable options for carbon management. This paper describes the preliminary modeling and flow simulation part of a DOE sponsored CO2 sequestration project. The main objective of the project is to understand the feasibility of long term sequestration of CO2 in a depleted oil reservoir through a field demonstration experiment. Before the actual CO2 injection begins, it was necessary to determine feasibility of injection. Advanced geologic modeling and flow simulation techniques were used to develop a model for the proposed target interval. A geologic model was developed using data available from well logs and cores. Subsequently, porous media flow simulations were used to match the historic production data. Values of a number of unknown reservoir rock and fluid properties were determined by trial and error method due to lack of appropriate data. The reservoir model thus verified was subsequently used to determine feasibility of injecting CO2 over a period of one month. A number of injection scenarios were tested to determine the response of the reservoir over a wide range of injection rates and regulatory operational constraints. The preliminary injection studies indicate that proposed amount of CO2 could be injected in the target interval without violating regulatory constraints. It was also observed that the injected CO2 plume could be of an extent to be monitored through a variety of proposed monitoring techniques.
