一点法产能公式在延安气田上古生界气藏中的应用  

Application of single-point productivity formula in Upper Paleozoic gas reservoir of Yan'an gasfield

作　　者：郑艳 ZHENG Yan(Gas Production Plant 1 of Yanchang Gasfield of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Yan'an Shaanxi 716000,China)

机构地区：[1]陕西延长石油(集团)有限责任公司延长气田采气一厂,陕西延安716000

出　　处：《石油化工应用》2021年第3期59-61,75,共4页Petrochemical Industry Application

摘　　要：一点法产能公式在气田产能评价中应用广泛,不同气田都会不断修正各自的一点法产能公式,但针对延安气田具有低压低渗、纵向气层多、单气层厚度薄、差异性大等特征,一点法产能公式中的α系数值为整个气田平均值,则会出现较大差异,为了能够更准确评价气井产能,本文根据研究区已有的修正等时试井成果,将气井按照不同层系、不同产能进行分类,求得不同层系和不同产能范围内的平均α系数值,验证对比后,一点法产能公式较之前更加准确,符合现场应用实际。The single-point productivity formula is widely used in gasfield productivity evaluation.Different gasfields will continuously modify their own single-point productivity formula.However,for the Yan'an gasfield,it has the characteristics of low pressure and low permeability,multiple vertical gas layers,thin single gas layer thickness,and large differences.Theαcoefficient in the single-point productivity formula is the average value of the entire gasfield,so there will be big differences.In order to be able to evaluate the gas well productivity more accurately,this paper,based on the existing revised isochronous well test results in the study area,divides the gas wells into different strata systems.Classify different production capacities,and obtain the averageαcoefficient values in different layers and different production ranges.After verification and comparison,the single-point productivity formula is more accurate than before,which is in line with the actual field application.

关 键 词：一点法产能公式 延安气田 多套层系 产能分类 

分 类 号：TE312[石油与天然气工程—油气田开发工程]