井底压力温度测试技术在充气欠平衡钻井中的应用

升2-17井是大庆油田在外围深层天然气勘探开发的一口重要的勘探开发评价井．该井在三开井段采用充氮气钻井液进行欠平衡钻进．应用改进后的并下压力温度测试工具实测出了三开充氮气并段不同工况下的并底压力、温度数据，并据此准确计算出了充气后钻井液的当量密度．准确掌握了充气量与钻井液当量密度之间的关系．比较准确地确定了地层压力的大小，精确计算出了井底负压值的大小。应用井底压力温度测试技术有利于发现和保护储层．提高勘探开发的效果。介绍了井底压力温度测试技术在升2-17井三开井段充氮气欠平衡钻进时的应用情况．并分析了井底压力温度测试数据。

Monitoring Bottom-Hole Pressure and Temperature in an Aerated Under-Balanced Drilling Well

Well Sheng-2-17 is an important evaluating well to gather data about deep natural gas reservoirs that is drilled in the periphery of the Daqing oilfield. The third hole section is deepened with drilling fluids containing nitrogen. Down hole pressure and temperature of this hole section at different situations are surveyed by an improved down hole pressure and temperature testing tool. Based on them, the equivalent density of aerated mud is accurately computed, relationships between quantity of aerated and the density is known well. Formation pressure and bottom hole negative pressure are also calculated with high precision. This technology can protect the reservoir effectively and improve the exploration and development effects. This article also introduces Well Sheng-2-17 geology characteristic and the gasification well drilling difficulty, as well as carries on the analysis situation using the bottom hole pressure measured data.