Composite nitrogen huff and puff method for bounded fault block reservoir
US11187065B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2019 |
| Grant date | Nov 30, 2021 |
| Priority date | — |
| Expiry date | Jan 24, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/168
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A composite nitrogen huff and puff method for a bounded fault block reservoir comprises: selecting the reservoir to be developed, wherein the reservoir to which the development method is applicable is roughly screened according to the following conditions: the reservoir is a bounded fault block reservoir, buried depth<5000 m, residual oil saturation>0.5, reservoir thickness>10 m, horizontal permeability>100 mD, vertical permeability to horizontal permeability ratio>0.35, reservoir porosity>0.20, and stratigraphic dip>8°; and sequentially performing the following huff and puff phases: a nitrogen huff and puff phase, a nitrogen and water composite huff and puff phase, a nitrogen and foaming agent composite huff and puff phase, and a nitrogen and carbon dioxide composite huff and puff phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.