Method for treating a tar sand reservoir to enhance petroleum production by cyclic steam stimulation
US4607699A · kind A · utility
32Cited by
10References
8Claims
0Family size
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Key dates
| Filing date | Jun 3, 1985 |
| Grant date | Aug 26, 1986 |
| Priority date | — |
| Expiry date | Jun 3, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/2405
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for conditioning the virgin drainage area of a tar sand formation that is penetrated by a well for enhanced petroleum production by cyclic steam stimulation is described. The method comprises fracturing the drainage area by injection of liquid carbon dioxide. While carbon dioxide is still in place within the formation, steam is injected into the formation. After a suitable soaking period, the well is opened to production. This method achieves better petroleum recovery than conventional huff-puff steam stimulation techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.