Downhole steam generator control system

摘要

A control system for controlling the operation of a Downhole Steam Generator (DHSG) system includes a cascade control strategy for control of individual final control elements in communication with a local well master controller. The final control elements may control fuel, oxidant, feedwater, and/or carbon dioxide flow to the downhole steam generator. The local well master controller may monitor and adjust the flows to the DHSG to control the operating performance of the DHSG.

主权项

1. A method of controlling a downhole steam generator, comprising:
supplying a fuel, an oxidant, and feedwater to the downhole steam generator; flowing the fuel, the oxidant, and the feedwater through at least one flow rate control valve, wherein the flow rate control valve includes a flow controller and a flow valve; combusting the fuel and the oxidant in the downhole steam generator; measuring operational characteristics of the downhole steam generator; communicating the measured operational characteristics of the downhole steam generator to a firing rate controller; calculating a firing rate demand using the firing rate controller based on the measured operational characteristics; communicating the firing rate demand to the flow controller; and adjusting the flow valve using the flow controller based on the firing rate demand to control flow of at least one of the fuel, the oxidant, and the feedwater to the downhole steam generator to obtain a predetermined injection rate and steam quality.