排水采气井井底压力测试计算方法研究与应用--油套环空物质平衡测压仪器研制及测试流程设计(之二)

应用套管物质平衡法测压时 ,需要通过环空测试计量套管压力变化、套管产气量和套管放空气量 ,从而计算环空拟气柱的长度。有了环空拟气柱长度这一关键参数 ,就能计算出井底压力。为此 ,从现场工程要求出发 ,通过对测试仪表的精度分析 ,研制了一套既满足现场工程要求又经济适用的地面测试装置 ,同时根据气井生产情况配套研制了一套测试流程以及测试方法。为现场生产提供了一种快捷、方便的测试计算井底压力手段

Study on Calculation Method of Downhole Pressure Testing in Drainage Gas Recovery Wells and Its Application

When using casing material balance method tests pressure,first,the change of metering casing pressure,casing gas production and casing discharge air should be tested,as a result,the length of annular pseudogas column is calculated.On the basis of the key parameter on the length of annular pseudogas column,BHP(bottomhole pressure)can be calculated.So,taking the engineering requirement in situ as the point of departure,through the accuracy analysis of testing instrument,sureface testing unit is developed which can meet the need of field engineering,and is economic and suitable as well as.Meanwhile,based on the cases of gas well production,a set of testing process and testing method are developed.It supplies a new and convenient testing method of BHP for field production.