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乐安油田草4沙二-三单元是一个具有强边水的稠油油藏,且与馆陶组的隔层局部缺失,在开发过程中面临着边水推进与顶部动用油藏开发水水侵等问题。本文结合开发实际,分析了此类油藏的水侵方式以及水侵对水驱特征曲线和油井生产周期效果的影响。并根据分析结果及时采取N2调剖等针对措施,取得了良好效果,2012年含水上升率控制在2.4%,为边底水稠油油藏的稳产提供了思路与方法。
Yue’an Oilfield Grass 4 Sand II - III unit is a heavy oil reservoir with strong edge water, and the Guantao Formation is partially missing. In the process of development, it is faced with the development of edge water and the development of water reservoir Intrusion and other issues. Based on the actual development, this paper analyzes the water intrusion patterns of these reservoirs and the effects of water inrush on the water flooding characteristic curve and the oil well production cycle effect. According to the results of the analysis, it took timely measures such as N2 profile control and achieved good results. The rate of water cut in 2012 was controlled at 2.4%, providing ideas and methods for stable production of heavy oil-in-water reservoirs.