苏东南井区开发指标优化研究

Study on Optimization of Development Index of Well Block in Su Southeast Area

苏东南井区属于鄂尔多斯盆地苏里格气田,是典型低渗致密砂岩气藏。井区内主要以水平井开发,辅以直井,井网较完善。本文利用数值模拟对已有生产数据进行拟合,对已有的两项指标采气速度和井距进行预测,对比优化,得到井区内采气速度为3%时,递减较慢且日产气量能稳定在一较高值;当井距调整为600 m,累计采气量高,后期可以在井距过大地方进行加密,以便更好控制地质储量。

Su Southeast well area belongs to Sulige gas field of Ordos Basin and is a typical low permeability tight sandstone gas reservoir.The well area is mainly developed by horizontal wells,supplemented by vertical wells,and the well pattern is perfect.In this paper,the existing production data are fitted by numerical simulation,and the gas production rate and well spacing are predicted and optimized,when the well spacing is adjusted to 600 m,the cumulative gas production is high,and in the later stage,the gas production can be encrypted in the place where the well spacing is too large,so as to better control the geological reserves.