Integrated construction method of fracturing and tertiary oil recovery for low-permeability reservoir
US11136865B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2019 |
| Grant date | Oct 5, 2021 |
| Priority date | — |
| Expiry date | Feb 6, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/003
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Disclosed is an integrated construction method of fracturing and tertiary oil recovery for low-permeability reservoir, including the following steps: dividing the target layer into several fracturing intervals; determining the amount of fracturing fluid required for the target fracturing interval; determining the flow rate of the target fracturing interval; determining the pumping construction procedure for the target fracturing interval; perforating the target fracturing interval; injecting oil displacement fracturing fluid into the target fracturing interval for fracturing construction; wherein the oil displacement fracturing fluid is a fracturing fluid to which an oil displacement agent is added. The beneficial effect of the technical scheme proposed in this disclosure is: by adding an oil displacing agent to the fracturing fluid, the fracturing and tertiary oil recovery are integrated, thereby improving the effect of fracturing and tertiary oil recovery, while also avoiding the water lock effect of the reservoir. Compared with the existing “first fracturing then tertiary oil recovery” scheme, it has obvious advantages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.