Title:
RECOVERY METHOD FOR CRUDE OIL
Document Type and Number:
WIPO Patent Application WO/2023/119491
Kind Code:
A1
Abstract:
This recovery method for crude oil includes: a stratum improvement fluid injection step for injecting, through an injection well into a stratum that includes crude oil between the injection well and a production well, a stratum reforming fluid for improving the wettability of the stratum; a first crude oil recovery step for injecting an over-flash fluid into the stratum through the injection well, causing the crude oil included in the stratum to move from the injection well side toward the production well side, and recovering the crude oil from the stratum through the production well; and a second crude oil recovery step for injecting a fluid for forming a foam with a fluid for stabilizing the foam into the stratum through the injection well, causing the crude oil included in the stratum to move from the injection well side toward the production well side, and recovering the crude oil from the stratum through the production well.
Inventors:
ITO AYAE (JP)
ITO DAISUKE (JP)
KAITO YUTARO (JP)
ITO DAISUKE (JP)
KAITO YUTARO (JP)
Application Number:
PCT/JP2021/047607
Publication Date:
June 29, 2023
Filing Date:
December 22, 2021
Export Citation:
Assignee:
JAPAN PETROLEUM EXPLORATION CO LTD (JP)
International Classes:
E21B43/00; C09K8/58; E21B43/16; E21B43/22
Domestic Patent References:
| WO2014056948A1 | 2014-04-17 |
Foreign References:
| US20150175876A1 | 2015-06-25 | |||
| US20170058186A1 | 2017-03-02 | |||
| US5295540A | 1994-03-22 | |||
| US20170292354A1 | 2017-10-12 | |||
| US20150198018A1 | 2015-07-16 | |||
| US20200102490A1 | 2020-04-02 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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