Title

Advances in productivity evaluation of water producing gas wells

作者

孙兵¹ 秦凌嵩² 杨小松¹ 顾少华¹ 王妍妍¹

单位

中国石化石油勘探开发研究院，北京 100083 中国石化中原油田分公司勘探开发研究院，河南郑州 450000

Organization

Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China Research Institute of Exploration and Development, Zhongyuan Oilfield Company, SINOPEC, Zhengzhou 450000, China

摘要

气藏开发中后期，气井见水后的气液两相流动降低了近井地带气相相对渗透率，对气井产能影响显著。通过对国内外见水气井产能评价的相关研究进行调研，总结并分析了几种主要的产水气井产能评价方法的优势及存在的不足，并对未来研究产水气井产能的关键问题及攻关方向提出了建议。结果表明：采用液相伤害的复合模型和引入气水两相拟压力和水气比的二项式产能方程是目前常用的见水气井产能评价方法。含水饱和度的变化对气水相渗及近井非达西流影响较大，增加了含水气井产能预测的难度。井筒积液及气液两相管流对产能影响较大，但考虑井筒气藏耦合的产能模型研究较少。水侵量计算、气水相渗实验和计算以及井筒气藏耦合模型的研究应成为见水气井产能研究的重点。

Abstract

In the middle and late stage of gas reservoir development, the gas liquid two-phase flow can reduce the gas relative permeability in the near wellbore, and has a significant effect on gas well productivity. This paper investigates the related research progress of the gas well deliverability evaluation, analyzes the main advantages and disadvantages of various deliverability evaluation methods, and gives suggestions for future research and key issues of water production gas wells. The research results show that the composite liquid damage model, two-phase pseudo pressure and water gas ratio were commonly considered in the binomial deliverability equation. The change of water saturation has a great influence on gas relative permeability and non Darcy flow in the near wellbore. Liquid loading and gas liquid two phase flow have great influences on productivity, but the productivity model coupling wellbore and reservoir is less. The calculation of aquifer influx, gas relative permeability and coupling of wellbore gas reservoir model should be focused on in the future research.

关键词：

气水两相; 产能; 拟压力; 相渗; 数值模拟
;

Keywords:

two-phase flow; gas well deliverability; pseudo pressure; relative permeability; numerical simulation
;

基金项目

DOI

10.6056/dkyqt201801013

气井见水后产能评价研究进展