摘要
积液是含水气井的常见问题,也是导致气井产量下降的主要因素。及时诊断气井是否积液并在必要时采取排液措施对气井生产至关重要。低产含水气井一般均存在积液现象,一旦已经形成积液,如果能够准确地计算积液液面的位置和积液量,将为后续的生产与排采提供重要参考依据。综合目前常见积液的预测方法,提出了一种新的积液高度计算方法。该方法将气井生产动态与气井产能相结合来判断气井的积液液面位置,并可以分析积液液面的动态变化。使用该方法通过产能方程以及井筒多相流动计算,得到井筒中压力分布特征,井筒底部纯液流与上部气液两相流的分界点,即可以认为是积液液面位置。通过不同生产日期的积液液面位置变化,可以判断后续生产的积液变化趋势。使用该方法对现场实际生产井进行计算,积液诊断的液面高度与实际液面测量结果非常接近。
As a common problem existing in most water-bearing gas wells, liquid loading is the main factor causing production drawdown. It is so important to diagnose the liquid loading in time and adopt drainage measures when necessary. Liquids generally accumulate in stripper water-bearing gas wells. Thus, accurate calculation of the liquid level and volume can offer valuable references for the follow- up drainage gas recovery. Based on the common method predicting liquid loading, a new approach calculating liquid level is put forward. In this approach, production performance is integrated with productivity to determine the liquid level and analyze its dynamic changes. By the productivity equation and wellbore multiphase flow, the pressure distribution can be calculated. And the demarcation between the liquid flow in downhole and gas-liquid two-phase flow in the upper wellbore may be considered as the liquid level. According to the changes of liquid level in different date, we can estimate the tendency of the change in the subsequent production. Field application shows that the diagnosed liquid level is very close to the actual one.
出处
《天然气技术与经济》
2016年第2期43-46,83,共4页
Natural Gas Technology and Economy
基金
国家科技重大专项"南海深水油气开发示范工程"(编号:2011ZX05056)
关键词
气井积液
积液高度
多相流
积液动态
liquid loading
liquid level
multiphase flow
liquidloading dynamic
作者简介
郭玲玲（1982-），女，工程师，从事采油气工程，人工举升方面的管理工作。E-mail：lily_guo2014@126.com
