地层压力取值误差对低渗气藏气井产能方程的影响及矫正方法  

Influence of Formation Pressure Value Error on Gas Well Productivity Equation in Low Permeability Gas Reservoir and Correction Method

作　　者：于伟强 YU Wei-qiang(China France Bohai Geoservices Co.,Ltd.,Tianjin 300457,China)

机构地区：[1]中法渤海地质服务有限公司,天津300457

出　　处：《承德石油高等专科学校学报》2024年第2期40-44,64,共6页Journal of Chengde Petroleum College

摘　　要：气井产能试井有时会因为开发或测试工艺等因素造成二项式产能方程出现较大误差,甚至会有负斜率的异常情况。对于低渗气井,供给范围内的平均地层压力随着生产会有较大幅度下降,如果没有准确的地层压力参考,将无法获得符合实际情况的产能方程和无阻流量。针对低渗储层气井探测范围内平均地层压力的测量或取值误差问题,利用不同制度的产量和井底流压数据,结合二项式压力平方产能方程,利用回归方法确定平均地层压力。通过低渗气井产能测试实例计算,回归分析得到的平均地层压力能够较准确地计算出二项式产能方程和无阻流量,为后续生产井的开发和配产提供有效指导。Due to factors such as development or testing technology,the binomial deliverability equation of gas well sometimes has big errors and even has an abnormal situation of negative slope.For low permeability gas wells,the average formation pressure within the supply range will drop significantly with production.Without accurate reference of formation pressure,it is impossible to obtain the deliverability equation and unobstructed flow rate in line with the actual situation.In view of the measurement or value error of the average formation pressure within the detection range of gas wells in low permeability reservoirs,by using the production and bottom hole flowing pressure data of different test procedure and combining the binomial productivity equation in the form of pressure square,the average formation pressure is obtained through regression method.Through the calculation of productivity test examples of low permeability gas wells,the average formation pressure obtained through regression analysis can accurately calculate the binomial productivity equation and unobstructed flow rate,providing effective guidance for the development and production allocation of subsequent production wells.

关 键 词：低渗气藏气井 二项式产能方程 平均地层压力 负斜率 压力平方 

分 类 号：TE328[石油与天然气工程—油气田开发工程]