裂缝性气藏水侵强度判断及水侵量计算

Strength Estimate and the Volume Calculation for Water-approaching of the Fractured Gas Reservoirs

对于裂缝-孔隙型气藏,边水窜进将严重影响气井产能及生产稳定性,甚至导致气井水淹。气藏的见水使得很多储层中的天然气被地层水封隔,可以采取排水措施有效地将地层气释放出来。物质平衡方法是一种有效的水侵计算方法,能够较为准确地计算水侵量,为制定生产计划提供依据。通过采用柯尔图版法,有效地确定气藏的驱替类型,同时应用修正的裂缝性物质平衡方法进行水侵量计算,得到了较为理想的结果。

For fractured-porous gas reservoir,the influence of margin water approaching is serious for the production of the gas well and the stabilization,even resulting in flooding in the gas well.After the water getting to the bottom of well,a large volume of gas is blockaded by water influx,only when the drainage gas production method is used this kind of gas can be recovered.Then,material balance method is a well known method to conclude the water influx effectively,it can support the data to make production plan of the gas well.This paper distinguishes the water cut strength by Cole plot and concludes the water influx by modified material balance method,and it obtains good conclusions finally.