Heat recovery method for wellpad SAGD steam generation

摘要

A method of recovering heat from hot produced fluids at SAGD facilities is described that utilizes wellpad steam generation such as Direct Steam Generators (DSG). Heated fluids produced by SAGD are used to preheat the water that is used to make steam for SAGD. Feedwater is conveniently preheated at the wellpads by the produced fluids, emulsions, and/or gases before feeding to the DSGs.

主权项

1. A system for recovering heat in wellpad Steam Assisted Gravity Drainage (SAGD) steam generation, comprising:
wellpads; at least one steam generator located at or near the wellpads, wherein feedwater is supplied to the steam generator; a produced fluids line conveying produced fluids from the well pad to pad separators, the pad separators located on the wellpads, each of the pad separators having
an inlet,a gas outlet, andan emulsion outlet,wherein the produced fluids enter the pad separators through the inlet, and separated produced gases exit the pad separators through the gas outlet, and separated produced emulsion exits the pad separator through the emulsion outlet; a produced gas line conveying produced gases from the pad separator gas outlet, a produced emulsion line conveying produced emulsion from the pad separator emulsion outlet, and a wellpad heat exchanger located on the wellpads connected to one or more lines on the wellpad wherein produced fluids, produced gases, or produced emulsion provide heat for the wellpad heat exchanger and wherein the feedwater is preheated at the wellpad heat exchanger by the produced fluids before the produced fluids enter the pad separators.