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Study on Time-lapse seismic monitoring for the thermal recovery of heavy oil in land thin-interbedding reservoirs
陆相薄互层稠油油藏热采时移地震监测研究

Keywords: the thermal recovery of heavy oil reservoirs,time-lapse seismic,seismic monitoring,seismic petrophysics,velocity,temperature
稠油热采
,时移地震,地震监测,地震岩石物理学,速度,温度

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Abstract:

Till now, time-lapse seismic monitoring of land thin-interbedding reservoirs has not made a clear breakthrough. It has active significance to strengthen studies and application of the time-lapse seismic method and theory for development and application of this technique in our country. At First, according to reservoir engineering theory, the influence of fire flooding on reservoir property is analyzed in detail. Then we emphatically study for the variation of elastic property of reservoir rock and pore fluid in the thermal recovery of heavy oil reservoirs by the use of the previous petrophysical data from lab core test. Further, we make the seismic forward modeling of fire flooding in land thin-interbedding reservoirs. Results show that thermal recovery can obviously change the elastic property of pore fluid and rock at high temperature and pressure. Even for a thin reservoir or a thin interbed reservoir, the common variation both pore fluid and rock will produce a huge elastic property difference between pre- or post-thermal recovery and cause obvious seismic anomalies. Therefore it is feasible for us to apply the time-lapse seismic method to the monitoring of the thermal recovery of thin interbed heavy oil reservoirs, which has the solid petrophysical foundation.

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