Method for removing bitumen to enhance formation permeability
US10385259B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Aug 7, 2014 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Mar 27, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/2605
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Treatment methods and treatment fluids for increasing permeability of organic shale formations are described herein. The treatment method includes treating an organic shale formation with a treatment fluid. The treatment fluid includes a solvent that dissolves bitumen in the shale formation. After treating the shale formation with the treatment fluid, oil is recovered from the shale formation. By removing bitumen from pores and pore throats within the formation, the solvent increases permeability of the formation and allows mobile oil to flow more easily through the formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.