Mineralogical Transformations as Indicators of Combustion Zone Temperatures During in Situ Combustion

摘要: ABSTRACT The maximum temperature reached in a reservoir is an important experimental parameter when evaluating the results of field or laboratory studies oil production by situ combustion methods. Minerological changes often occur rocks on heating, and these may serve as indicators combustion-zone temperatures. feasibility using method tests involving Alberta sands was investigated present study. Samples sand were exposed to simulated firetube apparatus, temperatures estimated mineralogical analysis postburn samples compared with those recorded thermocouples. It shown that number minerals commonly undergo potentially useful transformations. Those experimentally include: calcite, chlorite, dolomite, kaolinite, illite smectite, transformations which allowed be over range 350-700°C. Agreement between observed normally good, provided certain interfering factors taken into account. These include acids during combustion, effects combustion-gas concentrations some transformation temperatures, reaction under hydrothermal conditions. last not significant work, but its effect longer-term experiments requires further