A Feasibility Study of In Situ Combustion for the C Zone of the Buracica Field, Brazil
Abstract/Contents
- Abstract
- The Buracica Field is located in the Reconcavo Basin, 60 mi southwest of Salvador city, capital of Bahia state, in Brazil. It was discovered in 1960. The Buracica field is divided into four blocks (East Block, West Block, North Block, and Main Block) by tv;o geological faults as shown on the map on figure 1. It contains seven producing zones: A, I3, C, D, E, F, and G. Figure 2 presents a rough schematic of the oil zones of the field. Zones C, E, and G are the main oil producing zones. The other zones A, B, D, and F are shaly sands. Zones A and B are not producers, but zones D and F produce oil in a few wells or the Main Block. The well spacing is ten acres. The production wells are completed with pumping units and produce a dead oil from all producing zones, commingled. The original water saturation was 23 percent, p.v. Water flooding has been applied to the Main Block and Last Block since 1970. The North Block is small, 150 acres, and no secondary recovery technique has been used in it. The C zone is a friable sand., and it is considered the best producing zone of the field. Table 1 presents the properties of the C zone in the North Block of Buracica field, and Table 2 presents the sand size analysis of the C zone in the Main Block. The In Situ Combustion process is a well-known thermal oil recovery process. It is suitable for shallow reservoirs with porosities in the order of 20 percent or more, high permeabilities, and oil gravities a.s high as 40 %PI. An In Situ Combustion Pilot Field Test was proposed for the C zone of the North Block of the Buracica field for the following reasons: 1) The reservoir properties presented in Table 1 satisfy the conditions mentioned above. 2) It is a small field (150 acres), and no other secondary success, the of failure, recovery technique has been utilized in it. In case of process could be extended to the other Blocks. In case no damage would be done to the other blocks. 3) The expected. oil recovery using In Situ Comb1 be high ranging from 30% to 80% of the oil in place.
Description
| Type of resource | text |
|---|---|
| Date created | November 1977 |
Creators/Contributors
| Author | Campos, Antonio de Souza |
|---|---|
| Primary advisor | Ramey Jr., Henry J. |
| Degree granting institution | Stanford University, Department of Petroleum Engineering |
Subjects
| Subject | School of Earth Energy & Environmental Sciences |
|---|---|
| Genre | Thesis |
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Preferred citation
- Preferred Citation
- Campos, Antonio de Souza. (1977). A Feasibility Study of In Situ Combustion for the C Zone of the Buracica Field, Brazil. Stanford Digital Repository. Available at: https://purl.stanford.edu/cm791pv8632
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Master's Theses, Doerr School of Sustainability
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