西安石油大学学报（自然科学版）2024，Vol.39Issue(3)：50-57,8.DOI:10.3969/j.issn.1673-064X.2024.03.006
高压集输气井井筒积液量与流压计算方法
Calculation Method for Wellbore Liquid Volume and Bottom-hole Flowing Pressure of High-pressure Gathering and Transmission Natural Gas Wells
摘要
Abstract
In order to accurately calculate the wellbore fluid volume and bottom-hole flowing pressure of water-producing natural gas wells using high-pressure gathering and transmission technology to guide the implementation of foam drainage technology,a calculation method for wellbore fluid volume and bottom-hole flowing pressure was established.By simplifying the gas-water distribution in tubing and annulus,and based on the principle that the flowing pressure calculated by casing pressure is equal to the flowing pressure calculat-ed by tubing pressure,a calculation equation was derived that includes three key parameters:pressure p1 at the equivalent liquid level of the tubing,pressure p2 at the equivalent liquid level of the annulus,and the ratio of the equivalent liquid column heights of the annulus to the tubing,k.Based on dynamic monitoring data,a solution method for three key parameters was provided to iteratively calculate the wellbore fluid volume and bottomhole flowing pressure.Verified by actual data from 45 gas wells,the average error of the method in flowing pressure calculation is 4.4%,and the average error in liquid volume calculation is 14.8%.Meanwhile,this method mainly utili-zes production data and a small amount of flowing pressure test data for parallel iterative calculation,which has the advantages of low cost and fast calculation speed.关键词
高压集输气井/井筒积液量/井底流压Key words
high-pressure gathering and transmission gas well/wellbore liquid volume/bottom-hole flowing pressure分类
能源科技引用本文复制引用
王锦昌,赵润冬..高压集输气井井筒积液量与流压计算方法[J].西安石油大学学报（自然科学版）,2024,39(3):50-57,8.基金项目
中国石化华北油气分公司"东胜气田钻采工艺关键技术研究"项目(KJGLB-2022-13) （KJGLB-2022-13）
