Asynchronous cycle-based oil extraction apparatus, method and system

The asynchronous cycle-based oil extraction apparatus addresses low recovery rates in unconventional reservoirs by optimizing gas injection and production cycles, reducing gas channeling, and enhancing oil extraction efficiency.

US20260168365A1Pending Publication Date: 2026-06-18CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2022-12-08
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Unconventional oil reservoirs such as shale oil and tight oil reservoirs face low recovery rates due to poor physical properties and gas channeling issues during gas injection, limiting the effectiveness of gas injection development.

⚗Method used

An asynchronous cycle-based oil extraction apparatus and method involving a well group with a first and second horizontal well sharing a wellbore, where gas is injected into the first well, crude oil is produced from the second well, and the system controls extraction parameters based on real-time environmental data to optimize oil recovery.

🎯Benefits of technology

The apparatus improves oil extraction efficiency by reducing gas channeling and optimizing gas injection, enhancing the gas-oil ratio and cost-effectiveness through intelligent control of injection and production cycles.

✦ Generated by Eureka AI based on patent content.

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Abstract

An asynchronous cycle-based oil extraction apparatus has at least one well group and a control unit. Each well group has a wellbore vertical to the ground and at least one horizontal well group. The well group has a first well and a second well that share the wellbore. Both the first well and the second well are horizontal wells parallel to the ground. The control unit control operations to injecting gas into the first well through the casing, and soaking the second well; continuing to inject the gas into the first well to displace crude oil to the second well, and meanwhile, producing oil by the second well through the tubing; soaking the first well and the second well to allow the gas to enter a low-permeability area; and continuing to soak the first well, and producing oil by the second well through the tubing.
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