Method for steam assisted gravity drainage with pressure differential injection
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United States of America Patent
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Feb 23, 2016
Grant Date -
Nov 1, 2012
app pub date -
Mar 28, 2012
filing date -
Apr 26, 2011
priority date (Note) -
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Abstract
A process for recovering hydrocarbons with steam assisted gravity drainage (SAGD) with pressure differential injection. Methods for producing hydrocarbons in a subterranean formation having at least two well pairs include installing a highest pressure well pair in the subterranean formation; installing a lowest pressure well pair in the subterranean formation; applying a pressure differential across the highest pressure well pair and the lowest pressure well pair; injecting steam into the first injection well to form a first steam chamber; injecting steam into the final injection well to form an adjacent steam chamber; monitoring the steam chambers until they merge into a final steam chamber; ceasing the flow of steam into the first injection well; and injecting steam into the final injection well to maintain the final steam chamber.
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