基于压力的气井二项式产能方程曲线校正新方法  

A new correction method of gas well binomial productivity equation curve based on pressure

作　　者：吴英 马焕英[2] 张子前 叶旭峰 WU Ying;MA Huanying;ZHANG Ziqian;YE Xufeng(Hydrates and Marine Resources Strategic Research Center,CNOOC Research Institute Co.,Ltd.,Beijing 100192,China;Well Tech Division,China Oilfield Services Co.,Ltd.,CNOOC,LangFang HeBei 065201,China;Oil Testing Company of PetroChina Daqing Drilling Engineering Company,Daqing Heilongjiang 163412,China)

机构地区：[1]中海油研究总院有限责任公司水合物和海洋资源战略研究中心,北京100192 [2]中海油田服务股份有限公司油田技术事业部,河北廊坊065201 [3]中国石油大庆钻探工程公司试油测试公司,黑龙江大庆163412

出　　处：《油气井测试》2022年第6期1-5,共5页Well Testing

摘　　要：渤海海上气田在实际系统试气时,受多种因素影响,许多井的系统试气资料出现异常,现场实际工作中气井系统试井资料由于各种原因出现异常情况,导致出现异常产能曲线,不能直接利用指数式和二项式气井产能方程得到准确评价气井产能的相关参数和重要指标,无法计算气井无阻流量。通过现场实际经验,结合油藏工程理论方法,分析气井系统试井资料出现异常的4种可能原因,理论推导出气井二项式产能曲线校正新方法,并采用试凑法对理论公式中的测试压力进行校正,经实例气井测试资料计算得到校正后的二项式产能方程系数A为0.0016、B为0.3889、回归系数R 2为1,计算的无阻流量480×10^(4)m^(3)/d,气井投产后产量高,证明基于压力校正后的二项式产能方程理论公式和曲线符合气井产能规律,能真实反映气井实际产能,可为渤海海上气田勘探开发提供科学依据,类似气井可借鉴和应用。In view of the abnormal situation of the well test data of the gas well system in Bohai field work due to various reasons,the abnormal shape of the productivity curve,the relevant parameters and important indicators for the accurate evaluation of the gas well productivity cannot be directly obtained by the exponential method and binomial method,so the open flow calculation can’t be carried out.Based on the practical experience in the field and the theoretical method of reservoir engineering,this paper analyzes four possible causes of anomalies in the well test data of the gas well system,theoretically deduces a new method for correcting the binomial productivity curve of the gas well,and uses the trial and error method to correct the test pressure in the theoretical formula.The corrected binomial productivity equation coefficients A=0.0016,B=0.3889 and regression coefficient R 2=1 are calculated from the test data of Bohai gas Wells.The calculated open flow is 480×104 m 3/d,and the production is high after the gas well is put into operation.It is proved that the theoretical formula and curve based on pressure correction not only accord with the productivity law,but also can reflect the actual productivity of gas Wells,which can provide scientific basis for the exploration and development of Bohai offshore gas fields,and can be used for reference and application in similar gas Wells.

关 键 词：气井 系统试井 二项式产能方程 压力校正 无阻流量 试凑法 产能曲线 

分 类 号：TE353[石油与天然气工程—油气田开发工程]