Options For Gas Utilization in the Niger Delta
Abstract/Contents
- Abstract
- Associated gas production in Nigeria is well in excess of local industrial needs and to date, most of the excess is flareb. This work evaluates two possible options to utilize the produced gas that could result id higher oil recoveries from other reservoirs.The question of whether gravity segregation occurs in depleted oil reservoirs after gas injection (for storage purposes) and its time frame were investigated using the Eclipse simulator. The results show that gravity segregation does indeed occur. However, qualitatively speaking, the time scale in which it happens would enhance project economics for gas injection, but not make it profitable. This needs to be verified by a study on an actual reservoir and actual well/facility costs.The degree of C3/C4 enrichment of associated gas required to achieve miscibility was studied for range of reservoir conditions. The results show that between 17 and 35% enrichment levels were required for the depths under consideration. A simplified analysis showed that this results in a net gain in hydrocarbon value for a 1-D study. The analysis did not evaluate facility costs, dell costs, or areal and vertical sweep efficiencies in a 3-D model.The miscible injection option qualitatively looks like a more attractive option, due to the waiting time associated with gravity segregation and its resulting small oil columns. In a way, miscible injection recovers the residual oil in the production phase when it is much easier. However, other methods will have to be considered in addition to miscible injection, due to the limited supply of enrichment gases.
Description
| Type of resource | text |
|---|---|
| Date created | June 1999 |
Creators/Contributors
| Author | Ogundana, Olawale J. |
|---|---|
| Primary 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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- User agrees that, where applicable, content will not be used to identify or to otherwise infringe the privacy or confidentiality rights of individuals. Content distributed via the Stanford Digital Repository may be subject to additional license and use restrictions applied by the depositor.
Preferred citation
- Preferred Citation
- Ogundana, Olawale J. (1999). Options For Gas Utilization in the Niger Delta. Stanford Digital Repository. Available at: https://purl.stanford.edu/gc192dv5791
Collection
Master's Theses, Doerr School of Sustainability
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