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research-article

Numerical Modeling of Heavy-Oil Recovery Using Electromagnetic Radiation/Hydraulic Fracturing Considering Thermal Expansion Effect

[+] Author and Article Information
Alfred Davletbaev

Bashkir State University
DavletbaevAY@rambler.ru

Liana Kovaleva

Bashkir State University
Liana@ic.bashedu.ru

Aleksey Zainulin

Bashkir State University
zainal@list.ru

Tayfun Babadagli

University of Alberta
tayfun@ualberta.ca

1Corresponding author.

ASME doi:10.1115/1.4038853 History: Received January 30, 2017; Revised December 07, 2017

Abstract

Production of heavy oil from deep/tight formation using traditional technologies ("cold" production, injection of hot steam, etc.) is ineffective or inapplicable. An alternative is electromagnetic (EM) heating after fracturing. This paper presents the results of a numerical study of heavy oil production from a well with hydraulic fracture under radio-frequency (RF) electromagnetic radiation. Two parameters ignored in our previous modeling studies, namely adiabatic effect and the thermal expansion of oil, are considered in the new formulation while high gradients of pressure/temperature and high temperature occur around the well. The mathematical model is simulated distribution of pressure and temperature in the system of "well-fracture- formation". The distribution of thermal heat source is given by the Abernetty expression. The mathematical model takes into account the adiabatic effect and thermal expansion of heavy oil. The latter makes a significant contribution to heavy oil production. Multi-stage heavy production technology with heating is assumed and several stages are recognized: Stage 1: "Cold" heavy oil production, Stage 2: RF-EM heating, Stage 3: RF is turned off and "hot" oil production continues until the flow rate reaches its initial (before heating) value. These stages are repeated starting from the second stage. Finally, RF-EM heating technology is compared to "cold" production in terms of additional oil production and economics.

Copyright (c) 2017 by ASME
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