新庄特稠油藏蒸汽吞吐井动态特征及水侵识别分析

The dynamic characteristic of producing wells during the huff and puff in the Xinzhuang field,Henan,China

河南新庄油田核桃园组的油藏是典型的边水驱动特稠油藏,在分析温度对分流方程的影响后,对该区蒸汽吞吐生产井的含水率变化规律进行了总结。根据油藏的实际地质特征,建立了数值模型,对所总结的含水率变化规律进行了模拟验证。在此基础上,结合存水量变化等参数,提出了一种综合判断地层水侵入规律的方法。实际的开采井动态分析证明了该判断方法的可行性,对类似的水侵特稠油藏的生产动态分析有借鉴作用。

The oil reservoir of the Hetaoyuan group in the Xinzhuang oil field is a typical ultra-high viscous oil reservoir with underground water. Based on the effect of temperature on fractional flow equation, the transformation law of water cut during huff and puff production is summarized and afterward verified by digital simulation of the actual reservoir model. Taken into account the character of water cut and other factors such as the difference between injected steam and prouced water, a comprehensive discriminance to judge underground water is put forward. The methods suggested herein have been proved successfully by actual examples, and could offer perfect refence for the development and analysis of the same kind of reservoirs.