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Title: Electromagnetic Heating Methods for Heavy Oil Reservoirs

Abstract

The most widely used method of thermal oil recovery is by injecting steam into the reservoir. A well-designed steam injection project is very efficient in recovering oil, however its applicability is limited in many situations. Simulation studies and field experience has shown that for low injectivity reservoirs, small thickness of the oil-bearing zone, and reservoir heterogeneity limits the performance of steam injection. This paper discusses alternative methods of transferring heat to heavy oil reservoirs, based on electromagnetic energy. They present a detailed analysis of low frequency electric resistive (ohmic) heating and higher frequency electromagnetic heating (radio and microwave frequency). They show the applicability of electromagnetic heating in two example reservoirs. The first reservoir model has thin sand zones separated by impermeable shale layers, and very viscous oil. They model preheating the reservoir with low frequency current using two horizontal electrodes, before injecting steam. The second reservoir model has very low permeability and moderately viscous oil. In this case they use a high frequency microwave antenna located near the producing well as the heat source. Simulation results presented in this paper show that in some cases, electromagnetic heating may be a good alternative to steam injection or maybe used in combinationmore » with steam to improve heavy oil production. They identify the parameters which are critical in electromagnetic heating. They also discuss past field applications of electromagnetic heating including technical challenges and limitations.« less

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (US)
Sponsoring Org.:
USDOE Office of Defense Programs (DP) (US)
OSTI Identifier:
790586
Report Number(s):
UCRL-JC-138802
TRN: US200206%%79
DOE Contract Number:  
W-7405-Eng-48
Resource Type:
Conference
Resource Relation:
Conference: 2000 Society of Petroleum Engineers SPE/AAPG Western Regional Meeting, Long Beach, CA (US), 06/19/2000--06/23/2000; Other Information: PBD: 1 May 2000
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 58 GEOSCIENCES; HEAT SOURCES; HEAT TREATMENTS; HEATING; PERMEABILITY; PETROLEUM; STEAM INJECTION; VISCOSITY

Citation Formats

Sahni, A, Kumar, M, and Knapp, R B. Electromagnetic Heating Methods for Heavy Oil Reservoirs. United States: N. p., 2000. Web. doi:10.2118/62550-MS.
Sahni, A, Kumar, M, & Knapp, R B. Electromagnetic Heating Methods for Heavy Oil Reservoirs. United States. doi:10.2118/62550-MS.
Sahni, A, Kumar, M, and Knapp, R B. Mon . "Electromagnetic Heating Methods for Heavy Oil Reservoirs". United States. doi:10.2118/62550-MS. https://www.osti.gov/servlets/purl/790586.
@article{osti_790586,
title = {Electromagnetic Heating Methods for Heavy Oil Reservoirs},
author = {Sahni, A and Kumar, M and Knapp, R B},
abstractNote = {The most widely used method of thermal oil recovery is by injecting steam into the reservoir. A well-designed steam injection project is very efficient in recovering oil, however its applicability is limited in many situations. Simulation studies and field experience has shown that for low injectivity reservoirs, small thickness of the oil-bearing zone, and reservoir heterogeneity limits the performance of steam injection. This paper discusses alternative methods of transferring heat to heavy oil reservoirs, based on electromagnetic energy. They present a detailed analysis of low frequency electric resistive (ohmic) heating and higher frequency electromagnetic heating (radio and microwave frequency). They show the applicability of electromagnetic heating in two example reservoirs. The first reservoir model has thin sand zones separated by impermeable shale layers, and very viscous oil. They model preheating the reservoir with low frequency current using two horizontal electrodes, before injecting steam. The second reservoir model has very low permeability and moderately viscous oil. In this case they use a high frequency microwave antenna located near the producing well as the heat source. Simulation results presented in this paper show that in some cases, electromagnetic heating may be a good alternative to steam injection or maybe used in combination with steam to improve heavy oil production. They identify the parameters which are critical in electromagnetic heating. They also discuss past field applications of electromagnetic heating including technical challenges and limitations.},
doi = {10.2118/62550-MS},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {5}
}

Conference:
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