Co-optimization of Oil Recovery and Carbon Dioxide Storage
Abstract/Contents
- Abstract
- Geologic sequestration of carbon dioxide (CO2) in oil and gas reservoirs is one option to reduce the amount of CO2 released to the atmosphere. Carbon dioxide injection has been used in enhanced oil recovery (EOR) processes since the 1970s; the traditional approach is to reduce the amount of CO2 injected per barrel of oil produced. This minimizes the purchase cost of CO2. For a sequestration process, however, the aim is to maximize both the amount of oil produced and the amount of CO2 stored. It is not readily apparent how this aim is achieved in practice. In this study, several strategies are tested via compositional reservoir simulation to find injection and production procedures that "co-optimize" oil recovery and CO2 storage. Flow simulations are conducted on a synthetic, three dimensional, heterogeneous reservoir model. The reservoir description is stochastic in that multiple realizations of the reservoir are available. The reservoir fluid description is compositional and incorporates 14 distinct chemical components. The results show that traditional reservoir engineering techniques such as injecting CO2 and water in a sequential, so-called water-alternating-gas process are not conducive to maximizing CO2 stored within the reservoir. A well control process that shuts in (i.e., closes) wells producing large volumes of gas and allows shut-in wells to open as reservoir pressure increases is a successful strategy for co-optimization. This result holds for immiscible and miscible gas injection. The results improve when miscible gas injection is followed by pure CO2 injection. Combining this strategy with well-control technique produced the maximum amount of oil and simultaneously stored the most CO2. The results are robust. Multiple realizations of the reservoir model all confirm that the well control technique perform better than WAG or continuous gas injection.
Description
| Type of resource | text |
|---|---|
| Date created | December 2003 |
Creators/Contributors
| Author | Cakici, Mahmut Deniz |
|---|---|
| Primary advisor | Kovscek, Anthony R. |
| Advisor | Orr, Jr., Franklin M. |
| Degree granting institution | Stanford University, Department of Petroleum Engineering |
Subjects
| Subject | School of Earth Energy & Environmental Sciences |
|---|---|
| Genre | Thesis |
Bibliographic information
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Preferred citation
- Preferred Citation
- Cakici, Mahmut Deniz. (2003). Co-optimization of Oil Recovery and Carbon Dioxide Storage. Stanford Digital Repository. Available at: https://purl.stanford.edu/bj378nr9050
Collection
Master's Theses, Doerr School of Sustainability
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