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FEASIBILITY OF IN-SITU COMBUSTION OF TAR FROM A TARMAT Sidqi A. Abu-Khamsin
 

Summary: FEASIBILITY OF IN-SITU COMBUSTION OF TAR FROM A TARMAT
RESERVOIR
Sidqi A. Abu-Khamsin
Department of Petroleum Engineering
King Fahd University of Petroleum & Minerals
Dhahran 31261, Saudi Arabia
ABSTRACT
Combustion-tube tests were conducted on a tar of physical and chemical
characteristics similar to a natural reservoir tar. Ottawa sand of 20-30 mesh size
was used to prepare tar-sand mixtures of about 37% porosity, 19 to 25% water
saturation and 21 to 32% tar saturation. In runs with distilled water, a
combustion front was successfully initiated and moved into the sand pack. Later,
however, the front's temperature dropped below 500 C causing the front to
stagnate and become extinguished a short distance away from the tube's inlet.
When ferric nitrate was added to the water, sustained combustion was achieved
with front temperatures maintained above 500 C and high oxygen utilization. It
appears that a minimum iron concentration in the water of about 2700 ppm is
required for stable combustion. Concentrations above 4200 ppm did not enhance
combustion performance.
INTRODUCTION

  

Source: Abu-Khamsin, Sidqi - Department of Petroleum Engineering, King Fahd University of Petroleum and Minerals

 

Collections: Fossil Fuels