A Surface Supply System for Downhole Miscible Thermal Fluid Generators

Abstract

The invention discloses a ground supply system used for a downhole miscible phase thermal fluid generator, and relates to the field of petroleum development, in particular to a system used for supplying, monitoring and remote control of the downhole miscible phase thermal fluid generator. The system comprises an oxidant supply system, a fuel supply system, a cooling water supply system, an electric ignition system and a control system; the ground supply system provides working pressure for the downhole miscible phase thermal fluid generator. The ground supply system is simple in structure, small in size, convenient to install and disassemble and suitable for repeated use, can be applied to well sites or offshore platforms in various environments, can effectively reduce the cost of oil production, the monitoring system performs real-time monitoring on the supply flow, pressure and temperature generated by the ground supply system and the pressure and temperature of the downhole miscible phase thermal fluid generator during operation, remote control can be achieved, and the accuracy and safety of production are ensured.

Description

technical field [0001] The present invention relates to the field of petroleum development, in particular to a surface supply system for downhole miscible thermal fluid generators, in particular to a system for supplying, monitoring and remote control to downhole miscible thermal fluid generators. Background technique [0002] Miscible thermal fluid is formed by combining the flue gas generated by the combustion of high-pressure oxidant and high-pressure fuel with superheated steam. The injection of miscible thermal fluid into the oil layer to improve oil recovery has been applied in oil fields. Compared with the traditional heavy oil thermal recovery technology , miscible thermal fluid flooding is more effective in enhancing oil recovery and single well productivity. [0003] The downhole miscible thermal fluid generator is composed of a top connection assembly, a combustion assembly, a vaporization assembly, a screw pressurization assembly and an injection assembly. Throu...

AI Technical Summary

Problems solved by technology

[0005] 1. The structure is relatively complex, there are many parts in each part, and the corners and joint connections used in the ground manifold are relatively cumbersome, and it is difficult to achieve multiple disassembly and assembly

[0006] 2. The volume is large, and it is difficult to operate in some special well site environments, which increases a lot of manpower and capital investment, resulting in higher oil production costs

[0007] 3. The traditional surface supply system is often difficult to monitor and remotely control the production situation in real time, making it difficult to ensure the accuracy and safety of oil production

[0008] 4. The ground operation process is complex. Due to formation pressure, when the surface supply system performs surface operations such as replacement of parts, equipment, and pipeline connections, it is necessary to consider preventing the downhole fluid from overflowing, which increases the operation process and operation time

Images