稠油油藏水平井过热蒸汽吞吐储层适应性评价

Adaptability Evaluation for Superheated Steam Huff and Puff with Horizontal Well in Heavy Oil Reservoirs

过热蒸汽吞吐是目前开采稠油油藏的一种有效技术。由于过热蒸汽与普通湿蒸汽存在明显差异,基于普通湿蒸汽而建立的稠油蒸汽吞吐储层筛选标准并不完全适用于过热蒸汽吞吐。针对这一问题,以哈萨克斯坦K油藏水平井过热蒸汽吞吐先导试验区为研究对象,根据经济收支平衡原理,建立了水平井过热蒸汽吞吐的经济极限指标,并在此基础上以单井极限收益为依据,利用数值模拟方法确定了水平井过热蒸汽吞吐的地质及流体参数经济界限值,最终得到了水平井过热蒸汽吞吐的储层筛选标准。该储层筛选标准的建立为稠油油藏实施水平井过热蒸汽吞吐经济高效开发提供了理论指导。

Nowadays,the heavy oil reservoir can be effectively recovered by superheated steam huff and puff.Due to the significant difference between the superheated steam and general wet steam,the reservoir screening criteria for steam huff and puff based on general wet steam cannot be applied to superheated steam.To solve this problem,apilot test zone of superheated steam huff and puff with horizontal well in Kazakhstan K Oilfield was studied.According to the input and output balance principle,the economic limit indexes of the superheated steam huff and puff was built.Moreover,on the basis of the economic limit benefit,the economic limit values of reservoir petrophysical parameters for superheated steam huff and puff were obtained with numerical simulation.Finally,the reservoir screening criteria for superheated steam huff and puff with horizontal well were formed.The results may provide theoretical guidance for conducting superheated steam huff and puff with horizontal well in heavy oil reservoirs.