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Title: Gas-assisted gravity drainage (GAGD) process for improved oil recovery

Abstract

A rapid and inexpensive process for increasing the amount of hydrocarbons (e.g., oil) produced and the rate of production from subterranean hydrocarbon-bearing reservoirs by displacing oil downwards within the oil reservoir and into an oil recovery apparatus is disclosed. The process is referred to as "gas-assisted gravity drainage" and comprises the steps of placing one or more horizontal producer wells near the bottom of a payzone (i.e., rock in which oil and gas are found in exploitable quantities) of a subterranean hydrocarbon-bearing reservoir and injecting a fluid displacer (e.g., CO.sub.2) through one or more vertical wells or horizontal wells. Pre-existing vertical wells may be used to inject the fluid displacer into the reservoir. As the fluid displacer is injected into the top portion of the reservoir, it forms a gas zone, which displaces oil and water downward towards the horizontal producer well(s).

Inventors:
 [1]
  1. Baton Rouge, LA
Publication Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1069107
Patent Number(s):
8,215,392
Application Number:
11/399,831
Assignee:
Board of Supervisors of Louisiana State University And Agricultural and Mechanical College (Baton Rouge, LA)
DOE Contract Number:  
FC26-02NT15323
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM

Citation Formats

Rao, Dandina N. Gas-assisted gravity drainage (GAGD) process for improved oil recovery. United States: N. p., 2012. Web.
Rao, Dandina N. Gas-assisted gravity drainage (GAGD) process for improved oil recovery. United States.
Rao, Dandina N. Tue . "Gas-assisted gravity drainage (GAGD) process for improved oil recovery". United States. https://www.osti.gov/servlets/purl/1069107.
@article{osti_1069107,
title = {Gas-assisted gravity drainage (GAGD) process for improved oil recovery},
author = {Rao, Dandina N},
abstractNote = {A rapid and inexpensive process for increasing the amount of hydrocarbons (e.g., oil) produced and the rate of production from subterranean hydrocarbon-bearing reservoirs by displacing oil downwards within the oil reservoir and into an oil recovery apparatus is disclosed. The process is referred to as "gas-assisted gravity drainage" and comprises the steps of placing one or more horizontal producer wells near the bottom of a payzone (i.e., rock in which oil and gas are found in exploitable quantities) of a subterranean hydrocarbon-bearing reservoir and injecting a fluid displacer (e.g., CO.sub.2) through one or more vertical wells or horizontal wells. Pre-existing vertical wells may be used to inject the fluid displacer into the reservoir. As the fluid displacer is injected into the top portion of the reservoir, it forms a gas zone, which displaces oil and water downward towards the horizontal producer well(s).},
doi = {},
url = {https://www.osti.gov/biblio/1069107}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {7}
}

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Works referenced in this record:

Review of WAG Field Experience
conference, April 2013


Experimental Investigation of Miscible Secondary Gas Injection
conference, April 2013


Characterization of Operative Mechanisms in Gravity Drainage Field Projects Through Dimensional Analysis
conference, April 2013


Development of Gas Assisted Gravity Drainage (GAGD) Process for Improved Light Oil Recovery
conference, April 2013


On the Investigation of Gravity-Assisted Inert Gas Injection Using Micromodels, Long Berea Sandstone Cores, and Computer-Assisted Tomography
conference, April 2013


Experimental Investigation of Various Methods of Tertiary Gas Injection
conference, April 2013