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针对涩北二号气田开发后期边水水侵方向预测、井网调整等问题,综合考虑背斜构造边水气藏特征,提出以微构造研究为基础,结合实际生产数据,分析微构造对气藏气水分布动态变化的控制作用。结果表明:微构造图所界定气水边界更符合实际生产,负向微构造所在位置可动水饱和度明显偏高,水侵面积与可动水饱和度具有较高的相关性,位于负向微构造开发井平均单井日产水量为10.26m~3,位于正向微构造开发井平均单井日产水量为1.52m~3。研究认为:(1)气水边界线分布趋势与气藏微构造等值线分布趋势有较好的相关性,表明气藏气水分布特征明显受微构造分布特征控制;(2)气藏内水侵常常首先发生在气藏边缘小低点、小沟槽等负向微构造内;(3)负向微构造带内边水水体量较大,边水驱动力强,边水推进速度较快;(4)涩北二号气田气藏下步实现高效开发,降低水淹速度,其有效方法是有效地控制沟槽带内开发井的产气速度,并在微构造高点增加新井以完善井网。
Aiming at such problems as prediction of edge water intrusion and adjustment of well pattern in the late Sebei gas field, considering the features of marginal water and gas reservoirs in anticline, it is proposed that based on the study of microstructure and actual production data, Control of the dynamic changes of water vapor in gas reservoir. The results show that the gas-water boundary defined by the micro-structure map is more in line with the actual production, the movable water saturation is obviously higher at the location where the negative micro-structure is located, and the water invasion area has a higher correlation with the movable water saturation, The average single-well daily production volume of micro-structure development wells is 10.26m 3, and the average single-well daily production water volume located in the forward micro-structure development wells is 1.52m 3. The study shows that: (1) The distribution trend of gas and water boundary is in good correlation with the distribution trend of microfacies of gas reservoirs, which indicates that the distribution of gas and water in gas reservoirs is obviously controlled by the microstructure distribution; (2) Water intrusion often occurs firstly in the negative micro-structures such as low troughs and small trenches at the margin of gas reservoirs. (3) In the negative micro-structural zone, there is a large amount of water and water in the inner edge, strong driving force of edge water, (4) Efficient development of Sebei gas field gas reservoir in the next step to reduce water flooding speed is an effective method to control the gas production rate in the development well in the trench zone and increase the new well at the micro structure height Improve the well network.