建南某气井井口压力恢复“尖峰”式波动情况分析

Analysis of“peak”type fluctuation of wellhead pressure recovery in Jiannan gas well

建南某气井在进行压力恢复试井时,井口压力恢复速度缓慢且压力呈现阶段“尖峰”式上升。经分析,压力恢复缓慢的原因主要受邻井生产干扰及自身能量低影响;压力呈现阶段“尖峰”式上升主要受环境温度的变化、压力计精度高、灵敏度强影响,并且根据压力波动标准,判断该井压力波动属正常范围。该结果为气井压力恢复缓慢及异常提供了分析思路,为压力恢复是否达到标准要求提供了依据,具有一定的参考价值。

During the pressure build-up test of a well in Jiannan,the build-up speed of wellhead pressure was slow and the pressure showed a“spike”type rise.Through analysis,the slow pressure recovery is mainly caused by the production interference of adjacent well and low self energy;The“spike”type rise of the pressure is mainly affected by the change of ambient temperature and the high sensitivity of the pressure gauge.According to the pressure fluctuation standard,it is judged that the pressure fluctuation of the well is within the normal range.The results provide an analysis idea for the slow and abnormal pressure recovery of gas wells,and give a basis for whether the pressure recovery meets the standard requirements,which has certain reference value.