Self-driving well capable of achieving self-injection and self-production in same well and same layer and production method

Abstract

The invention provides a self-driving well capable of achieving self-injection and self-production in the same well and the same layer. The self-driving well comprises a straight well section, at least one production well section and at least one injection well section, wherein the straight well section is provided with an oil pipe and a casing pipe, the casing pipe is arranged outside the oil pipe in a sleeving mode, and an oil sleeve annulus is formed between the oil pipe and the casing pipe; the production well sections are located in an underground reservoir, the production well sections communicate with the oil pipe to form a production channel, and a first production mechanism is arranged in the production channel; and the injection well sections are located in the reservoir, and theinjection well sections communicate with the oil sleeve annulus to form an injection and production channel. The invention further provides a production method of the self-driving well capable of achieving self-injection and self-production in the same well and the same layer. The production method comprises the steps that (a) the injection well sections and the production well sections are laterally drilled at the positions, corresponding to the reservoir, of the straight well section; (b) injection fluid is injected along the injection and production channel, and the injection fluid entersthe injection well sections and then is injected into the reservoir; and (c) the injection fluid in the reservoir displaces the fluid in the reservoir to the production well sections, and the fluid isproduced to a well mouth through the first production mechanism. According to the self-driving well capable of achieving self-injection and self-production in the same well and the same layer and theproduction method, self-displacement and energy supplement in the same well and the same layer are achieved, the number of drilled wells is reduced, and the recovery efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of exploration and development of oil and gas fields, and refers to a self-driving well adopting a new well-type well pattern, in particular to a self-driving well and a mining method capable of self-injection and production in the same well and the same layer that can realize energy supplementation. Background technique [0002] The most commonly used well pattern in the development of existing oil and gas fields is the injection-production well group composed of injection wells and production wells. The fluid is injected through the injection wells, and the fluid in the reservoir is displaced to the adjacent production wells and produced on the surface of the wellhead. When the injection-production well group is used for the development of oil and gas fields, at least one injection well and one production well are required, and the number of drilling required is large, the area is large, the seepage resista...

AI Technical Summary

Problems solved by technology

[0002] The most commonly used well pattern in the development of existing oil and gas fields is the injection-production well group composed of injection wells and production wells. The fluid is injected through the injection wells, and the fluid in the reservoir is displaced to the adjacent production wells and produced on the surface of the wellhead. When the injection-production well group is used for the development of oil and gas fields, at least one injection well and one production well are required, which requires a large number of drilling wells, a large area, large seepage resistance, limited degree of direct connection to the reservoir, and low ultimate recovery. , high production cost, and heavy adjustment workload in the later stage of production

Images