Asynchronous cycle-based oil extraction apparatus, method and system

An asynchronous cycle-based oil extraction apparatus, comprising at least one well group and a control unit, each well group including a wellbore vertical to the ground, and at least one horizontal well group each at least including a first well and a second well,

• wherein the first well and the second well of each well group share one said wellbore, and both the first well and the second well are horizontal wells parallel to the ground;
• a casing, a tubing and a packer are arranged within the wellbore, wherein the casing is configured to inject gas into the first well, the tubing is configured to produce crude oil in the second well, and the packer is configured to isolate an annular space between the tubing and the casing;
• and
• the control unit is configured to perform:
• Step 1, injecting gas into the first well through the casing, and soaking the second well;
• Step 2, 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;
• Step 3, soaking the first well and the second well to allow the gas to enter a low-permeability area;
• and
• Step 4, continuing to soak the first well and producing oil by the second well through the tubing.