高含CO_(2)井产出剖面测试物性参数研究

Study on physical property parameters of production profile test in wells with high CO_(2)content

针对CO_(2)在临界点附近流体性质变化剧烈,气体状态方程难以准确表征临界点附近CO_(2)的物性参数问题,在高含CO_(2)井产出剖面测试解释中,采用流体物性参数修正、优化测试制度以及流量计算段卡取等方法来解决或规避资料解释中流体物性参数计算偏差问题。实例A井分别通过上述三种方法来处理在层1、层2中流体物性参数计算异常问题,处理效果明显,解释结果与地面计量数据匹配性好,结果可靠。利用上述几种方法可有效解决在高含CO_(2)井产出剖面测试中参数计算异常的问题,有助于提高资料录取的质量以及提高资料解释的准确性。

In the context of significant changes in fluid properties near the critical point of CO_(2),and the difficulty in accurately representing the physical parameters of CO_(2)near the critical point using gas state equations,when interpreting the production profile tests in wells with high CO_(2)content,various methods were employed to address or avoid deviations in fluid property parameter calculations.These methods include fluid property parameter corrections,optimization of testing procedures,and segment-based flow calculation adjustments.In case Well A,the three mentioned methods were applied to address abnormal fluid property parameter calculations in layer 1 and layer 2.The results showed significant improvements,and the interpretation results matched well with surface metering data,providing reliable outcomes.By utilizing these methods,the issue of abnormal parameter calculations in production profile tests in wells with high CO_(2)content can be effectively addressed,which contributes to enhancing the quality of data acquisition and the accuracy of data interpretation during testing processes.