摘要
本文通过对孔隙介质中热源传热的数学物理方程分析,并结合沙桶中热源传热物理试验,发现在对储层加热过程中,油气层中点热源处的温度与水层(或干层)中点热源处的温度相比增温的速度明显地快,而在加热过程后,油气层中点热源处的温度与水层(或干层)中点热源处的温度相比降低的慢。据此提出用人工热源(炸药热源、电热源等)对地层进行加热,然后测量井中温度的动态变化,据此思想,提出了一种从孔隙介质传热出发解释油气层、预测油气产能的传热测井新方法。
The results of a heat-conduction experiment with a central point source in a sand barrel shows that the temperature of the heat source increase much faster in sand saturated with oil and air （dry sand） than in water sand. During cooling the temperature of the central heat source goes down slower in oil- or air-saturated sands than in water sands. Based on the theory of heat-conduction in porous media and the experimental results, we developed a new heat-conduction logging technique which utilizes an artificial heat source （dynamite charge or electric heater） to heat up target forma- tions in the borehole and then measure the change of temperature at a later time. Post-frac oil production is shown to be directly proportional to the size of the temperature anomaly when other reservoir parameters are fairly consistent. The method is used to evaluate potential oil production for marginal reservoirs in the FY formation in Song-Liao basin of China.
