基于注气井刻度法凝析油气产出剖面解释方法

Production Profile Log Interpretation Based on Condensate Gas of Calibration in Gas Injection Wells

通过对循环注气XY凝析油气田注产剖面测井特性的研究,提出并建立注气井刻度法产出剖面测井解释方法和模型。研究分析23口井注气井干气密度值与温度、压力数据关系,拟合出干气密度值与温度、压力的关系式,应用Standing公式计算的凝析油地层体积系数推算出井下凝析油的密度值。干气的体积系数利用地面干气密度值与计算出井下干气密度值的比值确定。在1口凝析油气井产出剖面测井解释实例中计算出的油、气单相误差在9%以内。该方法为循环注气凝析油气田产出剖面测井解释提出新的解释方法,取得了较好的应用效果。

A new production profile logging interpretation method with its model is proposed in this paper after the calibration in the gas injection wells, and study about the logging characteristics of the input/output profiles in the recycle gas injection XY condensate gas fields. Based on the logging data analyses of 23 gas injection wells, the fitting expression for the dry gas density relative to the temperature and the pressure is acquired, the density of down hole condensate oil can be derived with the condensate oil formation volume factor from the Standing＇s formula. The dry gas formation volume factor can be acquired by the gas volume at reservoir conditions divided by its volume at standard conditions. The method is applied in a condensate gas well＇s production profile logging interpretation, from which the oil and gas mono-phases errors are less than 9%. This method is a novel one compared with the conventional logging interpretation of the input/output profiles in the recycle gas injection condensate gas fields, and gains a good application result.