井口监测压力分析在M气田低渗气井中的应用

Application of Wellhead Monitoring Pressure Analysis to Low Permeability Gas Well of M Gas Field

为了解决海上低渗气井测试资料品质差造成试井解释结果具有较大不确定性的问题,提出了井口监测压力分析技术。该技术以井口监测压力为研究对象,在关井压力恢复测试时,建立井口监测压力实时诊断曲线,对井口监测压力进行实时分析,从而确定实时关井压力恢复测试资料的质量和恢复测试时间。井口监测压力分析技术成功应用于崖城M气田M9低渗气井,大大地提高了试井解释精度,最大限度地节约了测试时间,且降低了测试作业成本,提高了生产实效。

At present,there is no effective and real-time monitoring method of determining the quality of the closed well pressure buildup testing data.Therefore,wellhead monitoring pressure analysis technique is proposed to meet this challenge by establishing real-time diagnosis curve of monitored wellhead pressure during shut-in pressure buildup,providing one method to judge the quality of shut-in pressure buildup test data and determine the shut-in time range.Wellhead monitoring pressure analysis technique mainly consists of well test design,wellhead monitoring pressure analysis and well test interpretation,which has been successfully applied in low permeability gas well M9 of M gas field,reaching reasonable expectations of accurate shut-in time range,reducing testing time and operating cost,and minimizing the influence to gas supply.