M区稠油油藏边水水淹规律研究

Study on Edge Water Flooding Law of Heavy Oil Reservoir in M Block

稠油蒸汽吞吐是降压开采的过程,油藏压力大幅度下降,导致边水侵入现象日益加剧。水侵油层采出程度低,热利用率低,水淹区储量动用程度低,因此,要抑制边水,提高边水侵入区的采出程度,确保稠油热采的持续稳产,首先要搞清楚边水水淹规律,为以后针对不同程度水淹程度进行剩余油挖潜提供依据。根据区块的动态数据和静态数据,建立地质模型,进行数值模拟,对区块划分不同的水淹级别,分析其水淹规律,为今后边水侵入稠油油藏的高效开发提供一定的理论基础。

The heavy oil steam stimulation is a depressurizing production process. Because of the decline of reservoir pressure, the edge water invasion phenomenon is more and more serious. The water invasion reservoir has low recovery degree, low heat utilization rate, and low producing degree. In order to curb edge water, improve the recovery degree of edge water invasion area, ensure continuous and stable yield of heavy oil thermal recovery, the edge water flooding rule should be studied. In this paper, according to dynamic data and static data, geological model was established, and numerical simulation was carried out, different water flooding level of the blocks was classified, the water flooding law was analyzed, which could provide theory basis for the efficient development of edge water invasion heavy oil reservoir in the future.