高含硫气藏气井产能试井解释理论

气井产能是气田开发方案设计、气井配产、地面建设以及开发方案调整的依据和基础，对其进行分析研究，可以准确地预测气井的动态，了解气层的特性，为合理、科学地开发气田提供充分依据。川东北罗家寨、普光等高含硫气田由于单井产量高、部分井存在硫堵塞等现象，导致产能试井曲线异常，部分井资料出现负斜率现象。从渗流力学出发，分析了高含硫气藏存在的渗流模式，建立了附加表皮、复合渗流模型等产能试井解释数学模型。对川东北罗家寨气田某井实测产能资料进行处理，取得了较好的效果。这对高含硫气藏进行合理配产具有指导意义。

INTERPRETATING THEORY OF GAS WELL PRODUCTIVITY TEST FOR HIGH SULFUR GAS RESERVOIRS

The gas well productivity is the basis and foundation for gas field development plan design, gas well production allocation, surface construction and adjustment of development plan. The analysis of gas well productivity can predict the dynamics of gas wells accurately and investigate characteristics of gas bearing formation, which provide sufficient basis for developing the gas field in rational and scientific way. The abnormal productivity test curve and the negative slop appearing in some well data resulted from the characteristics of high single well production and sulfur blocking in some wells in the Luojiazhai and Puguang gas field of the northeastern Sichuan basin. Therefore, starting from seepage mechanics, after having analyzed the seepage model existed in high sulfur gas reservoir, the productivity well test interpretation models, such as the additional epidermis model, the compound seepage model, have been established. Having processed the measured data of a well in the Luojiazhai gas field of the northeastern Sichuan basin with this model, it is proved that such model has guiding significance for production allocation of high sulfur gas reservoirs.