Title:
ASYNCHRONOUS CYCLE-BASED OIL EXTRACTION APPARATUS, METHOD AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/060415
Kind Code:
A1
Abstract:
Disclosed in the present invention are an asynchronous cycle-based oil extraction apparatus, method and system. The apparatus comprises at least one well group and a control unit; each well group comprises a shaft and at least one horizontal well group; each horizontal well group at least comprises a first well and a second well; the shaft is perpendicular to the ground; the well groups share one shaft; the first well and the second well are both horizontal wells parallel to the ground; a sleeve, an oil pipe and a packer are provided in the shaft; and the control unit is used for performing the following steps on the well group: injecting a gas into the first well by means of the sleeve, and soaking the second well; continuously injecting the gas into the first well so that crude oil displaces to the second well, and performing production in the second well by means of the oil pipe; soaking the first well and the second well, such that the gas enters a low-permeability area; and continuously soaking the first well, and performing production in the second well by means of the oil pipe. The present invention improves the oil extraction efficiency of a heterogeneous oil reservoir having a crack or a high-permeability strip.
Inventors:
WANG HAITAO (CN)
SUN HUANQUAN (CN)
HE YINGFU (CN)
LUO MING (CN)
LUN ZENGMIN (CN)
SUN HUANQUAN (CN)
HE YINGFU (CN)
LUO MING (CN)
LUN ZENGMIN (CN)
Application Number:
PCT/CN2022/137598
Publication Date:
March 28, 2024
Filing Date:
December 08, 2022
Export Citation:
Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
SINOPEC EXPLORATION & PROD RES INST (CN)
SINOPEC EXPLORATION & PROD RES INST (CN)
International Classes:
E21B43/16; E21B43/25
Domestic Patent References:
| WO2021004163A1 | 2021-01-14 |
Foreign References:
| CN106761606A | 2017-05-31 | |||
| CN107816340A | 2018-03-20 | |||
| CN106194131A | 2016-12-07 | |||
| CN106837290A | 2017-06-13 | |||
| CN109209306A | 2019-01-15 | |||
| CN111749658A | 2020-10-09 | |||
| CN112049614A | 2020-12-08 |
Attorney, Agent or Firm:
YUHUA UNITED INTELLECTUAL PROPERTY LAW FIRM (CN)
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